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Merge branch 'akpm' (patches from Andrew) 

Merge misc updates from Andrew Morton:

 - a few hotfixes

 - various misc updates

 - ocfs2 updates

 - most of MM

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (108 commits)
  mm, memory_hotplug: move movable_node to the hotplug proper
  mm, memory_hotplug: drop CONFIG_MOVABLE_NODE
  mm, memory_hotplug: drop artificial restriction on online/offline
  mm: memcontrol: account slab stats per lruvec
  mm: memcontrol: per-lruvec stats infrastructure
  mm: memcontrol: use generic mod_memcg_page_state for kmem pages
  mm: memcontrol: use the node-native slab memory counters
  mm: vmstat: move slab statistics from zone to node counters
  mm/zswap.c: delete an error message for a failed memory allocation in zswap_dstmem_prepare()
  mm/zswap.c: improve a size determination in zswap_frontswap_init()
  mm/zswap.c: delete an error message for a failed memory allocation in zswap_pool_create()
  mm/swapfile.c: sort swap entries before free
  mm/oom_kill: count global and memory cgroup oom kills
  mm: per-cgroup memory reclaim stats
  mm: kmemleak: treat vm_struct as alternative reference to vmalloc'ed objects
  mm: kmemleak: factor object reference updating out of scan_block()
  mm: kmemleak: slightly reduce the size of some structures on 64-bit architectures
  mm, mempolicy: don't check cpuset seqlock where it doesn't matter
  mm, cpuset: always use seqlock when changing task's nodemask
  mm, mempolicy: simplify rebinding mempolicies when updating cpusets
  ...
This commit is contained in:
Linus Torvalds 2017-07-06 22:27:08 -07:00
parent dc502142b6 4932381ee2
commit 9f45efb928
131 changed files with 3095 additions and 1725 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Documentation/admin-guide/kernel-parameters.txt
View File

@ -2315,8 +2315,11 @@
that the amount of memory usable for all allocations
is not too small.
movable_node [KNL] Boot-time switch to enable the effects
of CONFIG_MOVABLE_NODE=y. See mm/Kconfig for details.
movable_node [KNL] Boot-time switch to make hotplugable memory
NUMA nodes to be movable. This means that the memory
of such nodes will be usable only for movable
allocations which rules out almost all kernel
allocations. Use with caution!
MTD_Partition= [MTD]
Format: <name>,<region-number>,<size>,<offset>
@ -3772,8 +3775,14 @@
slab_nomerge [MM]
Disable merging of slabs with similar size. May be
necessary if there is some reason to distinguish
allocs to different slabs. Debug options disable
merging on their own.
allocs to different slabs, especially in hardened
environments where the risk of heap overflows and
layout control by attackers can usually be
frustrated by disabling merging. This will reduce
most of the exposure of a heap attack to a single
cache (risks via metadata attacks are mostly
unchanged). Debug options disable merging on their
own.
For more information see Documentation/vm/slub.txt.
slab_max_order= [MM, SLAB]

48
Documentation/cgroup-v2.txt
View File

@ -852,13 +852,25 @@ PAGE_SIZE multiple when read back.
The number of times the cgroup's memory usage was
about to go over the max boundary. If direct reclaim
fails to bring it down, the OOM killer is invoked.
fails to bring it down, the cgroup goes to OOM state.
oom
The number of times the OOM killer has been invoked in
the cgroup. This may not exactly match the number of
processes killed but should generally be close.
The number of time the cgroup's memory usage was
reached the limit and allocation was about to fail.
Depending on context result could be invocation of OOM
killer and retrying allocation or failing alloction.
Failed allocation in its turn could be returned into
userspace as -ENOMEM or siletly ignored in cases like
disk readahead. For now OOM in memory cgroup kills
tasks iff shortage has happened inside page fault.
oom_kill
The number of processes belonging to this cgroup
killed by any kind of OOM killer.
memory.stat
@ -956,6 +968,34 @@ PAGE_SIZE multiple when read back.
Number of times a shadow node has been reclaimed
pgrefill
Amount of scanned pages (in an active LRU list)
pgscan
Amount of scanned pages (in an inactive LRU list)
pgsteal
Amount of reclaimed pages
pgactivate
Amount of pages moved to the active LRU list
pgdeactivate
Amount of pages moved to the inactive LRU lis
pglazyfree
Amount of pages postponed to be freed under memory pressure
pglazyfreed
Amount of reclaimed lazyfree pages
memory.swap.current
A read-only single value file which exists on non-root

1
Documentation/dev-tools/kmemleak.rst
View File

@ -150,6 +150,7 @@ See the include/linux/kmemleak.h header for the functions prototype.
- ``kmemleak_init`` - initialize kmemleak
- ``kmemleak_alloc`` - notify of a memory block allocation
- ``kmemleak_alloc_percpu`` - notify of a percpu memory block allocation
- ``kmemleak_vmalloc`` - notify of a vmalloc() memory allocation
- ``kmemleak_free`` - notify of a memory block freeing
- ``kmemleak_free_part`` - notify of a partial memory block freeing
- ``kmemleak_free_percpu`` - notify of a percpu memory block freeing

63
Documentation/vm/ksm.txt
View File

@ -98,6 +98,50 @@ use_zero_pages - specifies whether empty pages (i.e. allocated pages
it is only effective for pages merged after the change.
Default: 0 (normal KSM behaviour as in earlier releases)
max_page_sharing - Maximum sharing allowed for each KSM page. This
enforces a deduplication limit to avoid the virtual
memory rmap lists to grow too large. The minimum
value is 2 as a newly created KSM page will have at
least two sharers. The rmap walk has O(N)
complexity where N is the number of rmap_items
(i.e. virtual mappings) that are sharing the page,
which is in turn capped by max_page_sharing. So
this effectively spread the the linear O(N)
computational complexity from rmap walk context
over different KSM pages. The ksmd walk over the
stable_node "chains" is also O(N), but N is the
number of stable_node "dups", not the number of
rmap_items, so it has not a significant impact on
ksmd performance. In practice the best stable_node
"dup" candidate will be kept and found at the head
of the "dups" list. The higher this value the
faster KSM will merge the memory (because there
will be fewer stable_node dups queued into the
stable_node chain->hlist to check for pruning) and
the higher the deduplication factor will be, but
the slowest the worst case rmap walk could be for
any given KSM page. Slowing down the rmap_walk
means there will be higher latency for certain
virtual memory operations happening during
swapping, compaction, NUMA balancing and page
migration, in turn decreasing responsiveness for
the caller of those virtual memory operations. The
scheduler latency of other tasks not involved with
the VM operations doing the rmap walk is not
affected by this parameter as the rmap walks are
always schedule friendly themselves.
stable_node_chains_prune_millisecs - How frequently to walk the whole
list of stable_node "dups" linked in the
stable_node "chains" in order to prune stale
stable_nodes. Smaller milllisecs values will free
up the KSM metadata with lower latency, but they
will make ksmd use more CPU during the scan. This
only applies to the stable_node chains so it's a
noop if not a single KSM page hit the
max_page_sharing yet (there would be no stable_node
chains in such case).
The effectiveness of KSM and MADV_MERGEABLE is shown in /sys/kernel/mm/ksm/:
pages_shared - how many shared pages are being used
@ -106,10 +150,29 @@ pages_unshared - how many pages unique but repeatedly checked for merging
pages_volatile - how many pages changing too fast to be placed in a tree
full_scans - how many times all mergeable areas have been scanned
stable_node_chains - number of stable node chains allocated, this is
effectively the number of KSM pages that hit the
max_page_sharing limit
stable_node_dups - number of stable node dups queued into the
stable_node chains
A high ratio of pages_sharing to pages_shared indicates good sharing, but
a high ratio of pages_unshared to pages_sharing indicates wasted effort.
pages_volatile embraces several different kinds of activity, but a high
proportion there would also indicate poor use of madvise MADV_MERGEABLE.
The maximum possible page_sharing/page_shared ratio is limited by the
max_page_sharing tunable. To increase the ratio max_page_sharing must
be increased accordingly.
The stable_node_dups/stable_node_chains ratio is also affected by the
max_page_sharing tunable, and an high ratio may indicate fragmentation
in the stable_node dups, which could be solved by introducing
fragmentation algorithms in ksmd which would refile rmap_items from
one stable_node dup to another stable_node dup, in order to freeup
stable_node "dups" with few rmap_items in them, but that may increase
the ksmd CPU usage and possibly slowdown the readonly computations on
the KSM pages of the applications.
Izik Eidus,
Hugh Dickins, 17 Nov 2009

2
arch/arm64/Kconfig
View File

@ -13,7 +13,7 @@ config ARM64
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
select ARCH_HAS_KCOV
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_SG_CHAIN

4
arch/arm64/include/asm/hugetlb.h
View File

@ -83,4 +83,8 @@ extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
extern void huge_ptep_clear_flush(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep);
#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
static inline bool gigantic_page_supported(void) { return true; }
#endif
#endif /* __ASM_HUGETLB_H */

53
arch/arm64/mm/hugetlbpage.c
View File

@ -42,15 +42,13 @@ int pud_huge(pud_t pud)
}
static int find_num_contig(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, size_t *pgsize)
pte_t *ptep, size_t *pgsize)
{
pgd_t *pgd = pgd_offset(mm, addr);
pud_t *pud;
pmd_t *pmd;
*pgsize = PAGE_SIZE;
if (!pte_cont(pte))
return 1;
pud = pud_offset(pgd, addr);
pmd = pmd_offset(pud, addr);
if ((pte_t *)pmd == ptep) {
@ -65,15 +63,16 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
{
size_t pgsize;
int i;
int ncontig = find_num_contig(mm, addr, ptep, pte, &pgsize);
int ncontig;
unsigned long pfn;
pgprot_t hugeprot;
if (ncontig == 1) {
if (!pte_cont(pte)) {
set_pte_at(mm, addr, ptep, pte);
return;
}
ncontig = find_num_contig(mm, addr, ptep, &pgsize);
pfn = pte_pfn(pte);
hugeprot = __pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^ pte_val(pte));
for (i = 0; i < ncontig; i++) {
@ -132,7 +131,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
pud_t *pud;
@ -184,21 +184,19 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
if (pte_cont(*ptep)) {
int ncontig, i;
size_t pgsize;
pte_t *cpte;
bool is_dirty = false;
cpte = huge_pte_offset(mm, addr);
ncontig = find_num_contig(mm, addr, cpte, *cpte, &pgsize);
ncontig = find_num_contig(mm, addr, ptep, &pgsize);
/* save the 1st pte to return */
pte = ptep_get_and_clear(mm, addr, cpte);
pte = ptep_get_and_clear(mm, addr, ptep);
for (i = 1, addr += pgsize; i < ncontig; ++i, addr += pgsize) {
/*
* If HW_AFDBM is enabled, then the HW could
* turn on the dirty bit for any of the page
* in the set, so check them all.
*/
++cpte;
if (pte_dirty(ptep_get_and_clear(mm, addr, cpte)))
++ptep;
if (pte_dirty(ptep_get_and_clear(mm, addr, ptep)))
is_dirty = true;
}
if (is_dirty)
@ -214,8 +212,6 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t pte, int dirty)
{
pte_t *cpte;
if (pte_cont(pte)) {
int ncontig, i, changed = 0;
size_t pgsize = 0;
@ -225,12 +221,11 @@ int huge_ptep_set_access_flags(struct vm_area_struct *vma,
__pgprot(pte_val(pfn_pte(pfn, __pgprot(0))) ^
pte_val(pte));
cpte = huge_pte_offset(vma->vm_mm, addr);
pfn = pte_pfn(*cpte);
ncontig = find_num_contig(vma->vm_mm, addr, cpte,
*cpte, &pgsize);
for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) {
changed |= ptep_set_access_flags(vma, addr, cpte,
pfn = pte_pfn(pte);
ncontig = find_num_contig(vma->vm_mm, addr, ptep,
&pgsize);
for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize) {
changed |= ptep_set_access_flags(vma, addr, ptep,
pfn_pte(pfn,
hugeprot),
dirty);
@ -247,13 +242,11 @@ void huge_ptep_set_wrprotect(struct mm_struct *mm,
{
if (pte_cont(*ptep)) {
int ncontig, i;
pte_t *cpte;
size_t pgsize = 0;
cpte = huge_pte_offset(mm, addr);
ncontig = find_num_contig(mm, addr, cpte, *cpte, &pgsize);
for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize)
ptep_set_wrprotect(mm, addr, cpte);
ncontig = find_num_contig(mm, addr, ptep, &pgsize);
for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize)
ptep_set_wrprotect(mm, addr, ptep);
} else {
ptep_set_wrprotect(mm, addr, ptep);
}
@ -264,14 +257,12 @@ void huge_ptep_clear_flush(struct vm_area_struct *vma,
{
if (pte_cont(*ptep)) {
int ncontig, i;
pte_t *cpte;
size_t pgsize = 0;
cpte = huge_pte_offset(vma->vm_mm, addr);
ncontig = find_num_contig(vma->vm_mm, addr, cpte,
*cpte, &pgsize);
for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize)
ptep_clear_flush(vma, addr, cpte);
ncontig = find_num_contig(vma->vm_mm, addr, ptep,
&pgsize);
for (i = 0; i < ncontig; ++i, ++ptep, addr += pgsize)
ptep_clear_flush(vma, addr, ptep);
} else {
ptep_clear_flush(vma, addr, ptep);
}

1
arch/hexagon/include/asm/pgtable.h
View File

@ -24,7 +24,6 @@
/*
* Page table definitions for Qualcomm Hexagon processor.
*/
#include <linux/swap.h>
#include <asm/page.h>
#define __ARCH_USE_5LEVEL_HACK
#include <asm-generic/pgtable-nopmd.h>

1
arch/hexagon/kernel/asm-offsets.c
View File

@ -25,7 +25,6 @@
#include <linux/compat.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/kbuild.h>
#include <asm/ptrace.h>

1
arch/hexagon/mm/vm_tlb.c
View File

@ -24,6 +24,7 @@
* be instantiated for it, differently from a native build.
*/
#include <linux/mm.h>
#include <linux/sched.h>
#include <asm/page.h>
#include <asm/hexagon_vm.h>

4
arch/ia64/mm/hugetlbpage.c
View File

@ -44,7 +44,7 @@ huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz)
}
pte_t *
huge_pte_offset (struct mm_struct *mm, unsigned long addr)
huge_pte_offset (struct mm_struct *mm, unsigned long addr, unsigned long sz)
{
unsigned long taddr = htlbpage_to_page(addr);
pgd_t *pgd;
@ -92,7 +92,7 @@ struct page *follow_huge_addr(struct mm_struct *mm, unsigned long addr, int writ
if (REGION_NUMBER(addr) != RGN_HPAGE)
return ERR_PTR(-EINVAL);
ptep = huge_pte_offset(mm, addr);
ptep = huge_pte_offset(mm, addr, HPAGE_SIZE);
if (!ptep || pte_none(*ptep))
return NULL;
page = pte_page(*ptep);

11
arch/ia64/mm/init.c
View File

@ -646,20 +646,13 @@ mem_init (void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
{
pg_data_t *pgdat;
struct zone *zone;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
pgdat = NODE_DATA(nid);
zone = pgdat->node_zones +
zone_for_memory(nid, start, size, ZONE_NORMAL, for_device);
ret = __add_pages(nid, zone, start_pfn, nr_pages);
ret = __add_pages(nid, start_pfn, nr_pages, want_memblock);
if (ret)
printk("%s: Problem encountered in __add_pages() as ret=%d\n",
__func__, ret);

3
arch/metag/mm/hugetlbpage.c
View File

@ -74,7 +74,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
pud_t *pud;

3
arch/mips/mm/hugetlbpage.c
View File

@ -36,7 +36,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr,
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
unsigned long sz)
{
pgd_t *pgd;
pud_t *pud;

2
arch/mn10300/include/asm/Kbuild
View File

@ -1,8 +1,10 @@
generic-y += barrier.h
generic-y += clkdev.h
generic-y += device.h
generic-y += exec.h
generic-y += extable.h
generic-y += fb.h
generic-y += irq_work.h
generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h

1
arch/mn10300/include/asm/device.h
View File

@ -1 +0,0 @@
#include <asm-generic/device.h>

23
arch/mn10300/include/asm/fb.h
View File

@ -1,23 +0,0 @@
/* MN10300 Frame buffer stuff
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#ifndef _ASM_FB_H
#define _ASM_FB_H
#include <linux/fb.h>
#define fb_pgprotect(...) do {} while (0)
static inline int fb_is_primary_device(struct fb_info *info)
{
return 0;
}
#endif /* _ASM_FB_H */

3
arch/parisc/mm/hugetlbpage.c
View File

@ -69,7 +69,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
pud_t *pud;

10
arch/powerpc/include/asm/book3s/64/hugetlb.h
View File

@ -50,4 +50,14 @@ static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
else
return entry;
}
#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
static inline bool gigantic_page_supported(void)
{
if (radix_enabled())
return true;
return false;
}
#endif
#endif

86
arch/powerpc/mm/hugetlbpage.c
View File

@ -17,6 +17,8 @@
#include <linux/memblock.h>
#include <linux/bootmem.h>
#include <linux/moduleparam.h>
#include <linux/swap.h>
#include <linux/swapops.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/tlb.h>
@ -55,7 +57,7 @@ static unsigned nr_gpages;
#define hugepd_none(hpd) (hpd_val(hpd) == 0)
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, unsigned long sz)
{
/* Only called for hugetlbfs pages, hence can ignore THP */
return __find_linux_pte_or_hugepte(mm->pgd, addr, NULL, NULL);
@ -617,62 +619,39 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb,
} while (addr = next, addr != end);
}
/*
* We are holding mmap_sem, so a parallel huge page collapse cannot run.
* To prevent hugepage split, disable irq.
*/
struct page *
follow_huge_addr(struct mm_struct *mm, unsigned long address, int write)
struct page *follow_huge_pd(struct vm_area_struct *vma,
unsigned long address, hugepd_t hpd,
int flags, int pdshift)
{
bool is_thp;
pte_t *ptep, pte;
unsigned shift;
unsigned long mask, flags;
struct page *page = ERR_PTR(-EINVAL);
pte_t *ptep;
spinlock_t *ptl;
struct page *page = NULL;
unsigned long mask;
int shift = hugepd_shift(hpd);
struct mm_struct *mm = vma->vm_mm;
local_irq_save(flags);
ptep = find_linux_pte_or_hugepte(mm->pgd, address, &is_thp, &shift);
if (!ptep)
goto no_page;
pte = READ_ONCE(*ptep);
/*
* Verify it is a huge page else bail.
* Transparent hugepages are handled by generic code. We can skip them
* here.
*/
if (!shift || is_thp)
goto no_page;
retry:
ptl = &mm->page_table_lock;
spin_lock(ptl);
if (!pte_present(pte)) {
page = NULL;
goto no_page;
ptep = hugepte_offset(hpd, address, pdshift);
if (pte_present(*ptep)) {
mask = (1UL << shift) - 1;
page = pte_page(*ptep);
page += ((address & mask) >> PAGE_SHIFT);
if (flags & FOLL_GET)
get_page(page);
} else {
if (is_hugetlb_entry_migration(*ptep)) {
spin_unlock(ptl);
__migration_entry_wait(mm, ptep, ptl);
goto retry;
}
}
mask = (1UL << shift) - 1;
page = pte_page(pte);
if (page)
page += (address & mask) / PAGE_SIZE;
no_page:
local_irq_restore(flags);
spin_unlock(ptl);
return page;
}
struct page *
follow_huge_pmd(struct mm_struct *mm, unsigned long address,
pmd_t *pmd, int write)
{
BUG();
return NULL;
}
struct page *
follow_huge_pud(struct mm_struct *mm, unsigned long address,
pud_t *pud, int write)
{
BUG();
return NULL;
}
static unsigned long hugepte_addr_end(unsigned long addr, unsigned long end,
unsigned long sz)
{
@ -763,8 +742,11 @@ static int __init add_huge_page_size(unsigned long long size)
* Hash: 16M and 16G
*/
if (radix_enabled()) {
if (mmu_psize != MMU_PAGE_2M)
return -EINVAL;
if (mmu_psize != MMU_PAGE_2M) {
if (cpu_has_feature(CPU_FTR_POWER9_DD1) ||
(mmu_psize != MMU_PAGE_1G))
return -EINVAL;
}
} else {
if (mmu_psize != MMU_PAGE_16M && mmu_psize != MMU_PAGE_16G)
return -EINVAL;

12
arch/powerpc/mm/mem.c
View File

@ -126,18 +126,14 @@ int __weak remove_section_mapping(unsigned long start, unsigned long end)
return -ENODEV;
}
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
{
struct pglist_data *pgdata;
struct zone *zone;
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int rc;
resize_hpt_for_hotplug(memblock_phys_mem_size());
pgdata = NODE_DATA(nid);
start = (unsigned long)__va(start);
rc = create_section_mapping(start, start + size);
if (rc) {
@ -147,11 +143,7 @@ int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
return -EFAULT;
}
/* this should work for most non-highmem platforms */
zone = pgdata->node_zones +
zone_for_memory(nid, start, size, 0, for_device);
return __add_pages(nid, zone, start_pfn, nr_pages);
return __add_pages(nid, start_pfn, nr_pages, want_memblock);
}
#ifdef CONFIG_MEMORY_HOTREMOVE

6
arch/powerpc/platforms/Kconfig.cputype
View File

@ -344,12 +344,18 @@ config PPC_STD_MMU_64
config PPC_RADIX_MMU
bool "Radix MMU Support"
depends on PPC_BOOK3S_64
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
default y
help
Enable support for the Power ISA 3.0 Radix style MMU. Currently this
is only implemented by IBM Power9 CPUs, if you don't have one of them
you can probably disable this.
config ARCH_ENABLE_HUGEPAGE_MIGRATION
def_bool y
depends on PPC_BOOK3S_64 && HUGETLB_PAGE && MIGRATION
config PPC_MMU_NOHASH
def_bool y
depends on !PPC_STD_MMU

2
arch/s390/Kconfig
View File

@ -68,7 +68,7 @@ config S390
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
select ARCH_HAS_KCOV
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_SG_CHAIN

5
arch/s390/include/asm/hugetlb.h
View File

@ -39,7 +39,7 @@ static inline int prepare_hugepage_range(struct file *file,
#define arch_clear_hugepage_flags(page) do { } while (0)
static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
pte_t *ptep, unsigned long sz)
{
if ((pte_val(*ptep) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3)
pte_val(*ptep) = _REGION3_ENTRY_EMPTY;
@ -112,4 +112,7 @@ static inline pte_t huge_pte_modify(pte_t pte, pgprot_t newprot)
return pte_modify(pte, newprot);
}
#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
static inline bool gigantic_page_supported(void) { return true; }
#endif
#endif /* _ASM_S390_HUGETLB_H */

3
arch/s390/mm/hugetlbpage.c
View File

@ -180,7 +180,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
return (pte_t *) pmdp;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgdp;
p4d_t *p4dp;

32
arch/s390/mm/init.c
View File

@ -166,43 +166,17 @@ unsigned long memory_block_size_bytes(void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
{
unsigned long zone_start_pfn, zone_end_pfn, nr_pages;
unsigned long start_pfn = PFN_DOWN(start);
unsigned long size_pages = PFN_DOWN(size);
pg_data_t *pgdat = NODE_DATA(nid);
struct zone *zone;
int rc, i;
int rc;
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
for (i = 0; i < MAX_NR_ZONES; i++) {
zone = pgdat->node_zones + i;
if (zone_idx(zone) != ZONE_MOVABLE) {
/* Add range within existing zone limits, if possible */
zone_start_pfn = zone->zone_start_pfn;
zone_end_pfn = zone->zone_start_pfn +
zone->spanned_pages;
} else {
/* Add remaining range to ZONE_MOVABLE */
zone_start_pfn = start_pfn;
zone_end_pfn = start_pfn + size_pages;
}
if (start_pfn < zone_start_pfn || start_pfn >= zone_end_pfn)
continue;
nr_pages = (start_pfn + size_pages > zone_end_pfn) ?
zone_end_pfn - start_pfn : size_pages;
rc = __add_pages(nid, zone, start_pfn, nr_pages);
if (rc)
break;
start_pfn += nr_pages;
size_pages -= nr_pages;
if (!size_pages)
break;
}
rc = __add_pages(nid, start_pfn, size_pages, want_memblock);
if (rc)
vmem_remove_mapping(start, size);
return rc;

3
arch/sh/mm/hugetlbpage.c
View File

@ -42,7 +42,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
pud_t *pud;

10
arch/sh/mm/init.c
View File

@ -485,20 +485,14 @@ void free_initrd_mem(unsigned long start, unsigned long end)
#endif
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
{
pg_data_t *pgdat;
unsigned long start_pfn = PFN_DOWN(start);
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
pgdat = NODE_DATA(nid);
/* We only have ZONE_NORMAL, so this is easy.. */
ret = __add_pages(nid, pgdat->node_zones +
zone_for_memory(nid, start, size, ZONE_NORMAL,
for_device),
start_pfn, nr_pages);
ret = __add_pages(nid, start_pfn, nr_pages, want_memblock);
if (unlikely(ret))
printk("%s: Failed, __add_pages() == %d\n", __func__, ret);

3
arch/sparc/mm/hugetlbpage.c
View File

@ -277,7 +277,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
pud_t *pud;

3
arch/tile/mm/hugetlbpage.c
View File

@ -102,7 +102,8 @@ static pte_t *get_pte(pte_t *base, int index, int level)
return ptep;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
pud_t *pud;

11
arch/tile/mm/pgtable.c
View File

@ -503,6 +503,17 @@ void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
}
EXPORT_SYMBOL(ioremap_prot);
#if !defined(CONFIG_PCI) || !defined(CONFIG_TILEGX)
/* ioremap is conditionally declared in pci_gx.c */
void __iomem *ioremap(resource_size_t phys_addr, unsigned long size)
{
return NULL;
}
EXPORT_SYMBOL(ioremap);
#endif
/* Unmap an MMIO VA mapping. */
void iounmap(volatile void __iomem *addr_in)
{

3
arch/x86/Kconfig
View File

@ -22,7 +22,7 @@ config X86_64
def_bool y
depends on 64BIT
# Options that are inherently 64-bit kernel only:
select ARCH_HAS_GIGANTIC_PAGE
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
select ARCH_SUPPORTS_INT128
select ARCH_USE_CMPXCHG_LOCKREF
select HAVE_ARCH_SOFT_DIRTY
@ -72,6 +72,7 @@ config X86
select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
select ARCH_WANT_FRAME_POINTERS
select ARCH_WANTS_DYNAMIC_TASK_STRUCT
select ARCH_WANTS_THP_SWAP if X86_64
select BUILDTIME_EXTABLE_SORT
select CLKEVT_I8253
select CLOCKSOURCE_VALIDATE_LAST_CYCLE

4
arch/x86/include/asm/hugetlb.h
View File

@ -85,4 +85,8 @@ static inline void arch_clear_hugepage_flags(struct page *page)
{
}
#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
static inline bool gigantic_page_supported(void) { return true; }
#endif
#endif /* _ASM_X86_HUGETLB_H */

2
arch/x86/mm/hugetlbpage.c
View File

@ -33,7 +33,7 @@ follow_huge_addr(struct mm_struct *mm, unsigned long address, int write)
if (!vma || !is_vm_hugetlb_page(vma))
return ERR_PTR(-EINVAL);
pte = huge_pte_offset(mm, address);
pte = huge_pte_offset(mm, address, vma_mmu_pagesize(vma));
/* hugetlb should be locked, and hence, prefaulted */
WARN_ON(!pte || pte_none(*pte));

7
arch/x86/mm/init_32.c
View File

@ -823,15 +823,12 @@ void __init mem_init(void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
{
struct pglist_data *pgdata = NODE_DATA(nid);
struct zone *zone = pgdata->node_zones +
zone_for_memory(nid, start, size, ZONE_HIGHMEM, for_device);
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
return __add_pages(nid, zone, start_pfn, nr_pages);
return __add_pages(nid, start_pfn, nr_pages, want_memblock);
}
#ifdef CONFIG_MEMORY_HOTREMOVE

11
arch/x86/mm/init_64.c
View File

@ -772,22 +772,15 @@ static void update_end_of_memory_vars(u64 start, u64 size)
}
}
/*
* Memory is added always to NORMAL zone. This means you will never get
* additional DMA/DMA32 memory.
*/
int arch_add_memory(int nid, u64 start, u64 size, bool for_device)
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
{
struct pglist_data *pgdat = NODE_DATA(nid);
struct zone *zone = pgdat->node_zones +
zone_for_memory(nid, start, size, ZONE_NORMAL, for_device);
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
init_memory_mapping(start, start + size);
ret = __add_pages(nid, zone, start_pfn, nr_pages);
ret = __add_pages(nid, start_pfn, nr_pages, want_memblock);
WARN_ON_ONCE(ret);
/* update max_pfn, max_low_pfn and high_memory */

83
drivers/base/memory.c
View File

@ -128,6 +128,9 @@ static ssize_t show_mem_removable(struct device *dev,
int ret = 1;
struct memory_block *mem = to_memory_block(dev);
if (mem->state != MEM_ONLINE)
goto out;
for (i = 0; i < sections_per_block; i++) {
if (!present_section_nr(mem->start_section_nr + i))
continue;
@ -135,6 +138,7 @@ static ssize_t show_mem_removable(struct device *dev,
ret &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
}
out:
return sprintf(buf, "%d\n", ret);
}
@ -388,39 +392,43 @@ static ssize_t show_valid_zones(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct memory_block *mem = to_memory_block(dev);
unsigned long start_pfn, end_pfn;
unsigned long valid_start, valid_end, valid_pages;
unsigned long start_pfn = section_nr_to_pfn(mem->start_section_nr);
unsigned long nr_pages = PAGES_PER_SECTION * sections_per_block;
struct zone *zone;
int zone_shift = 0;
unsigned long valid_start_pfn, valid_end_pfn;
bool append = false;
int nid;
start_pfn = section_nr_to_pfn(mem->start_section_nr);
end_pfn = start_pfn + nr_pages;
/* The block contains more than one zone can not be offlined. */
if (!test_pages_in_a_zone(start_pfn, end_pfn, &valid_start, &valid_end))
/*
* The block contains more than one zone can not be offlined.
* This can happen e.g. for ZONE_DMA and ZONE_DMA32
*/
if (!test_pages_in_a_zone(start_pfn, start_pfn + nr_pages, &valid_start_pfn, &valid_end_pfn))
return sprintf(buf, "none\n");
zone = page_zone(pfn_to_page(valid_start));
valid_pages = valid_end - valid_start;
start_pfn = valid_start_pfn;
nr_pages = valid_end_pfn - start_pfn;
/* MMOP_ONLINE_KEEP */
sprintf(buf, "%s", zone->name);
/* MMOP_ONLINE_KERNEL */
zone_can_shift(valid_start, valid_pages, ZONE_NORMAL, &zone_shift);
if (zone_shift) {
strcat(buf, " ");
strcat(buf, (zone + zone_shift)->name);
/*
* Check the existing zone. Make sure that we do that only on the
* online nodes otherwise the page_zone is not reliable
*/
if (mem->state == MEM_ONLINE) {
strcat(buf, page_zone(pfn_to_page(start_pfn))->name);
goto out;
}
/* MMOP_ONLINE_MOVABLE */
zone_can_shift(valid_start, valid_pages, ZONE_MOVABLE, &zone_shift);
if (zone_shift) {
strcat(buf, " ");
strcat(buf, (zone + zone_shift)->name);
nid = pfn_to_nid(start_pfn);
if (allow_online_pfn_range(nid, start_pfn, nr_pages, MMOP_ONLINE_KERNEL)) {
strcat(buf, default_zone_for_pfn(nid, start_pfn, nr_pages)->name);
append = true;
}
if (allow_online_pfn_range(nid, start_pfn, nr_pages, MMOP_ONLINE_MOVABLE)) {
if (append)
strcat(buf, " ");
strcat(buf, NODE_DATA(nid)->node_zones[ZONE_MOVABLE].name);
}
out:
strcat(buf, "\n");
return strlen(buf);
@ -685,14 +693,6 @@ static int add_memory_block(int base_section_nr)
return 0;
}
static bool is_zone_device_section(struct mem_section *ms)
{
struct page *page;
page = sparse_decode_mem_map(ms->section_mem_map, __section_nr(ms));
return is_zone_device_page(page);
}
/*
* need an interface for the VM to add new memory regions,
* but without onlining it.
@ -702,9 +702,6 @@ int register_new_memory(int nid, struct mem_section *section)
int ret = 0;
struct memory_block *mem;
if (is_zone_device_section(section))
return 0;
mutex_lock(&mem_sysfs_mutex);
mem = find_memory_block(section);
@ -741,11 +738,16 @@ static int remove_memory_section(unsigned long node_id,
{
struct memory_block *mem;
if (is_zone_device_section(section))
return 0;
mutex_lock(&mem_sysfs_mutex);
/*
* Some users of the memory hotplug do not want/need memblock to
* track all sections. Skip over those.
*/
mem = find_memory_block(section);
if (!mem)
goto out_unlock;
unregister_mem_sect_under_nodes(mem, __section_nr(section));
mem->section_count--;
@ -754,6 +756,7 @@ static int remove_memory_section(unsigned long node_id,
else
put_device(&mem->dev);
out_unlock:
mutex_unlock(&mem_sysfs_mutex);
return 0;
}
@ -820,6 +823,10 @@ int __init memory_dev_init(void)
*/
mutex_lock(&mem_sysfs_mutex);
for (i = 0; i < NR_MEM_SECTIONS; i += sections_per_block) {
/* Don't iterate over sections we know are !present: */
if (i > __highest_present_section_nr)
break;
err = add_memory_block(i);
if (!ret)
ret = err;

72
drivers/base/node.c
View File

@ -129,11 +129,11 @@ static ssize_t node_read_meminfo(struct device *dev,
nid, K(node_page_state(pgdat, NR_UNSTABLE_NFS)),
nid, K(sum_zone_node_page_state(nid, NR_BOUNCE)),
nid, K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
nid, K(sum_zone_node_page_state(nid, NR_SLAB_RECLAIMABLE) +
sum_zone_node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
nid, K(sum_zone_node_page_state(nid, NR_SLAB_RECLAIMABLE)),
nid, K(node_page_state(pgdat, NR_SLAB_RECLAIMABLE) +
node_page_state(pgdat, NR_SLAB_UNRECLAIMABLE)),
nid, K(node_page_state(pgdat, NR_SLAB_RECLAIMABLE)),
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
nid, K(sum_zone_node_page_state(nid, NR_SLAB_UNRECLAIMABLE)),
nid, K(node_page_state(pgdat, NR_SLAB_UNRECLAIMABLE)),
nid, K(node_page_state(pgdat, NR_ANON_THPS) *
HPAGE_PMD_NR),
nid, K(node_page_state(pgdat, NR_SHMEM_THPS) *
@ -141,7 +141,7 @@ static ssize_t node_read_meminfo(struct device *dev,
nid, K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED) *
HPAGE_PMD_NR));
#else
nid, K(sum_zone_node_page_state(nid, NR_SLAB_UNRECLAIMABLE)));
nid, K(node_page_state(pgdat, NR_SLAB_UNRECLAIMABLE)));
#endif
n += hugetlb_report_node_meminfo(nid, buf + n);
return n;
@ -368,21 +368,14 @@ int unregister_cpu_under_node(unsigned int cpu, unsigned int nid)
}
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
#define page_initialized(page) (page->lru.next)
static int __ref get_nid_for_pfn(unsigned long pfn)
{
struct page *page;
if (!pfn_valid_within(pfn))
return -1;
#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT
if (system_state < SYSTEM_RUNNING)
return early_pfn_to_nid(pfn);
#endif
page = pfn_to_page(pfn);
if (!page_initialized(page))
return -1;
return pfn_to_nid(pfn);
}
@ -468,10 +461,9 @@ int unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
return 0;
}
static int link_mem_sections(int nid)
int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages)
{
unsigned long start_pfn = NODE_DATA(nid)->node_start_pfn;
unsigned long end_pfn = start_pfn + NODE_DATA(nid)->node_spanned_pages;
unsigned long end_pfn = start_pfn + nr_pages;
unsigned long pfn;
struct memory_block *mem_blk = NULL;
int err = 0;
@ -559,10 +551,7 @@ static int node_memory_callback(struct notifier_block *self,
return NOTIFY_OK;
}
#endif /* CONFIG_HUGETLBFS */
#else /* !CONFIG_MEMORY_HOTPLUG_SPARSE */
static int link_mem_sections(int nid) { return 0; }
#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
#if !defined(CONFIG_MEMORY_HOTPLUG_SPARSE) || \
!defined(CONFIG_HUGETLBFS)
@ -576,39 +565,32 @@ static void init_node_hugetlb_work(int nid) { }
#endif
int register_one_node(int nid)
int __register_one_node(int nid)
{
int error = 0;
int p_node = parent_node(nid);
struct node *parent = NULL;
int error;
int cpu;
if (node_online(nid)) {
int p_node = parent_node(nid);
struct node *parent = NULL;
if (p_node != nid)
parent = node_devices[p_node];
if (p_node != nid)
parent = node_devices[p_node];
node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL);
if (!node_devices[nid])
return -ENOMEM;
node_devices[nid] = kzalloc(sizeof(struct node), GFP_KERNEL);
if (!node_devices[nid])
return -ENOMEM;
error = register_node(node_devices[nid], nid, parent);
error = register_node(node_devices[nid], nid, parent);
/* link cpu under this node */
for_each_present_cpu(cpu) {
if (cpu_to_node(cpu) == nid)
register_cpu_under_node(cpu, nid);
}
/* link memory sections under this node */
error = link_mem_sections(nid);
/* initialize work queue for memory hot plug */
init_node_hugetlb_work(nid);
/* link cpu under this node */
for_each_present_cpu(cpu) {
if (cpu_to_node(cpu) == nid)
register_cpu_under_node(cpu, nid);
}
return error;
/* initialize work queue for memory hot plug */
init_node_hugetlb_work(nid);
return error;
}
void unregister_one_node(int nid)
@ -657,9 +639,7 @@ static struct node_attr node_state_attr[] = {
#ifdef CONFIG_HIGHMEM
[N_HIGH_MEMORY] = _NODE_ATTR(has_high_memory, N_HIGH_MEMORY),
#endif
#ifdef CONFIG_MOVABLE_NODE
[N_MEMORY] = _NODE_ATTR(has_memory, N_MEMORY),
#endif
[N_CPU] = _NODE_ATTR(has_cpu, N_CPU),
};
@ -670,9 +650,7 @@ static struct attribute *node_state_attrs[] = {
#ifdef CONFIG_HIGHMEM
&node_state_attr[N_HIGH_MEMORY].attr.attr,
#endif
#ifdef CONFIG_MOVABLE_NODE
&node_state_attr[N_MEMORY].attr.attr,
#endif
&node_state_attr[N_CPU].attr.attr,
NULL
};

2
drivers/block/zram/zram_drv.c
View File

@ -469,6 +469,7 @@ static bool zram_same_page_write(struct zram *zram, u32 index,
zram_slot_unlock(zram, index);
atomic64_inc(&zram->stats.same_pages);
atomic64_inc(&zram->stats.pages_stored);
return true;
}
kunmap_atomic(mem);
@ -524,6 +525,7 @@ static void zram_free_page(struct zram *zram, size_t index)
zram_clear_flag(zram, index, ZRAM_SAME);
zram_set_element(zram, index, 0);
atomic64_dec(&zram->stats.same_pages);
atomic64_dec(&zram->stats.pages_stored);
return;
}

4
drivers/sh/intc/virq.c
View File

@ -94,10 +94,8 @@ static int add_virq_to_pirq(unsigned int irq, unsigned int virq)
}
entry = kzalloc(sizeof(struct intc_virq_list), GFP_ATOMIC);
if (!entry) {
pr_err("can't allocate VIRQ mapping for %d\n", virq);
if (!entry)
return -ENOMEM;
}
entry->irq = virq;

2
fs/dax.c
View File

@ -1213,7 +1213,7 @@ static int dax_iomap_pte_fault(struct vm_fault *vmf,
case IOMAP_MAPPED:
if (iomap.flags & IOMAP_F_NEW) {
count_vm_event(PGMAJFAULT);
mem_cgroup_count_vm_event(vmf->vma->vm_mm, PGMAJFAULT);
count_memcg_event_mm(vmf->vma->vm_mm, PGMAJFAULT);
major = VM_FAULT_MAJOR;
}
error = dax_insert_mapping(mapping, iomap.bdev, iomap.dax_dev,

18
fs/dcache.c
View File

@ -3546,8 +3546,6 @@ __setup("dhash_entries=", set_dhash_entries);
static void __init dcache_init_early(void)
{
unsigned int loop;
/* If hashes are distributed across NUMA nodes, defer
* hash allocation until vmalloc space is available.
*/
@ -3559,24 +3557,19 @@ static void __init dcache_init_early(void)
sizeof(struct hlist_bl_head),
dhash_entries,
13,
HASH_EARLY,
HASH_EARLY | HASH_ZERO,
&d_hash_shift,
&d_hash_mask,
0,
0);
for (loop = 0; loop < (1U << d_hash_shift); loop++)
INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
static void __init dcache_init(void)
{
unsigned int loop;
/*
/*
* A constructor could be added for stable state like the lists,
* but it is probably not worth it because of the cache nature
* of the dcache.
* of the dcache.
*/
dentry_cache = KMEM_CACHE(dentry,
SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_MEM_SPREAD|SLAB_ACCOUNT);
@ -3590,14 +3583,11 @@ static void __init dcache_init(void)
sizeof(struct hlist_bl_head),
dhash_entries,
13,
0,
HASH_ZERO,
&d_hash_shift,
&d_hash_mask,
0,
0);
for (loop = 0; loop < (1U << d_hash_shift); loop++)
INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
/* SLAB cache for __getname() consumers */

22
fs/file.c
View File

@ -30,21 +30,6 @@ unsigned int sysctl_nr_open_min = BITS_PER_LONG;
unsigned int sysctl_nr_open_max =
__const_min(INT_MAX, ~(size_t)0/sizeof(void *)) & -BITS_PER_LONG;
static void *alloc_fdmem(size_t size)
{
/*
* Very large allocations can stress page reclaim, so fall back to
* vmalloc() if the allocation size will be considered "large" by the VM.
*/
if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
void *data = kmalloc(size, GFP_KERNEL_ACCOUNT |
__GFP_NOWARN | __GFP_NORETRY);
if (data != NULL)
return data;
}
return __vmalloc(size, GFP_KERNEL_ACCOUNT, PAGE_KERNEL);
}
static void __free_fdtable(struct fdtable *fdt)
{
kvfree(fdt->fd);
@ -131,13 +116,14 @@ static struct fdtable * alloc_fdtable(unsigned int nr)
if (!fdt)
goto out;
fdt->max_fds = nr;
data = alloc_fdmem(nr * sizeof(struct file *));
data = kvmalloc_array(nr, sizeof(struct file *), GFP_KERNEL_ACCOUNT);
if (!data)
goto out_fdt;
fdt->fd = data;
data = alloc_fdmem(max_t(size_t,
2 * nr / BITS_PER_BYTE + BITBIT_SIZE(nr), L1_CACHE_BYTES));
data = kvmalloc(max_t(size_t,
2 * nr / BITS_PER_BYTE + BITBIT_SIZE(nr), L1_CACHE_BYTES),
GFP_KERNEL_ACCOUNT);
if (!data)
goto out_arr;
fdt->open_fds = data;

14
fs/inode.c
View File

@ -1915,8 +1915,6 @@ __setup("ihash_entries=", set_ihash_entries);
*/
void __init inode_init_early(void)
{
unsigned int loop;
/* If hashes are distributed across NUMA nodes, defer
* hash allocation until vmalloc space is available.
*/
@ -1928,20 +1926,15 @@ void __init inode_init_early(void)
sizeof(struct hlist_head),
ihash_entries,
14,
HASH_EARLY,
HASH_EARLY | HASH_ZERO,
&i_hash_shift,
&i_hash_mask,
0,
0);
for (loop = 0; loop < (1U << i_hash_shift); loop++)
INIT_HLIST_HEAD(&inode_hashtable[loop]);
}
void __init inode_init(void)
{
unsigned int loop;
/* inode slab cache */
inode_cachep = kmem_cache_create("inode_cache",
sizeof(struct inode),
@ -1959,14 +1952,11 @@ void __init inode_init(void)
sizeof(struct hlist_head),
ihash_entries,
14,
0,
HASH_ZERO,
&i_hash_shift,
&i_hash_mask,
0,
0);
for (loop = 0; loop < (1U << i_hash_shift); loop++)
INIT_HLIST_HEAD(&inode_hashtable[loop]);
}
void init_special_inode(struct inode *inode, umode_t mode, dev_t rdev)

10
fs/namespace.c
View File

@ -3239,7 +3239,6 @@ static void __init init_mount_tree(void)
void __init mnt_init(void)
{
unsigned u;
int err;
mnt_cache = kmem_cache_create("mnt_cache", sizeof(struct mount),
@ -3248,22 +3247,17 @@ void __init mnt_init(void)
mount_hashtable = alloc_large_system_hash("Mount-cache",
sizeof(struct hlist_head),
mhash_entries, 19,
0,
HASH_ZERO,
&m_hash_shift, &m_hash_mask, 0, 0);
mountpoint_hashtable = alloc_large_system_hash("Mountpoint-cache",
sizeof(struct hlist_head),
mphash_entries, 19,
0,
HASH_ZERO,
&mp_hash_shift, &mp_hash_mask, 0, 0);
if (!mount_hashtable || !mountpoint_hashtable)
panic("Failed to allocate mount hash table\n");
for (u = 0; u <= m_hash_mask; u++)
INIT_HLIST_HEAD(&mount_hashtable[u]);
for (u = 0; u <= mp_hash_mask; u++)
INIT_HLIST_HEAD(&mountpoint_hashtable[u]);
kernfs_init();
err = sysfs_init();

2
fs/ncpfs/mmap.c
View File

@ -89,7 +89,7 @@ static int ncp_file_mmap_fault(struct vm_fault *vmf)
* -- nyc
*/
count_vm_event(PGMAJFAULT);
mem_cgroup_count_vm_event(vmf->vma->vm_mm, PGMAJFAULT);
count_memcg_event_mm(vmf->vma->vm_mm, PGMAJFAULT);
return VM_FAULT_MAJOR;
}

1
fs/ocfs2/cluster/netdebug.c
View File

@ -426,6 +426,7 @@ static int sc_fop_release(struct inode *inode, struct file *file)
struct o2net_sock_container *dummy_sc = sd->dbg_sock;
o2net_debug_del_sc(dummy_sc);
kfree(dummy_sc);
return seq_release_private(inode, file);
}

2
fs/ocfs2/inode.c
View File

@ -136,7 +136,7 @@ struct inode *ocfs2_ilookup(struct super_block *sb, u64 blkno)
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, unsigned flags,
int sysfile_type)
{
int rc = 0;
int rc = -ESTALE;
struct inode *inode = NULL;
struct super_block *sb = osb->sb;
struct ocfs2_find_inode_args args;

5
fs/ocfs2/ocfs2_fs.h
View File

@ -25,6 +25,8 @@
#ifndef _OCFS2_FS_H
#define _OCFS2_FS_H
#include <linux/magic.h>
/* Version */
#define OCFS2_MAJOR_REV_LEVEL 0
#define OCFS2_MINOR_REV_LEVEL 90
@ -56,9 +58,6 @@
#define OCFS2_MIN_BLOCKSIZE 512
#define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE
/* Filesystem magic number */
#define OCFS2_SUPER_MAGIC 0x7461636f
/* Object signatures */
#define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2"
#define OCFS2_INODE_SIGNATURE "INODE01"

2
fs/ocfs2/stackglue.c
View File

@ -631,7 +631,7 @@ static struct attribute *ocfs2_attrs[] = {
NULL,
};
static struct attribute_group ocfs2_attr_group = {
static const struct attribute_group ocfs2_attr_group = {
.attrs = ocfs2_attrs,
};

12
fs/userfaultfd.c
View File

@ -214,6 +214,7 @@ static inline struct uffd_msg userfault_msg(unsigned long address,
* hugepmd ranges.
*/
static inline bool userfaultfd_huge_must_wait(struct userfaultfd_ctx *ctx,
struct vm_area_struct *vma,
unsigned long address,
unsigned long flags,
unsigned long reason)
@ -224,7 +225,7 @@ static inline bool userfaultfd_huge_must_wait(struct userfaultfd_ctx *ctx,
VM_BUG_ON(!rwsem_is_locked(&mm->mmap_sem));
pte = huge_pte_offset(mm, address);
pte = huge_pte_offset(mm, address, vma_mmu_pagesize(vma));
if (!pte)
goto out;
@ -243,6 +244,7 @@ out:
}
#else
static inline bool userfaultfd_huge_must_wait(struct userfaultfd_ctx *ctx,
struct vm_area_struct *vma,
unsigned long address,
unsigned long flags,
unsigned long reason)
@ -448,7 +450,8 @@ int handle_userfault(struct vm_fault *vmf, unsigned long reason)
must_wait = userfaultfd_must_wait(ctx, vmf->address, vmf->flags,
reason);
else
must_wait = userfaultfd_huge_must_wait(ctx, vmf->address,
must_wait = userfaultfd_huge_must_wait(ctx, vmf->vma,
vmf->address,
vmf->flags, reason);
up_read(&mm->mmap_sem);
@ -1114,11 +1117,6 @@ static ssize_t userfaultfd_read(struct file *file, char __user *buf,
static void __wake_userfault(struct userfaultfd_ctx *ctx,
struct userfaultfd_wake_range *range)
{
unsigned long start, end;
start = range->start;
end = range->start + range->len;
spin_lock(&ctx->fault_pending_wqh.lock);
/* wake all in the range and autoremove */
if (waitqueue_active(&ctx->fault_pending_wqh))

4
include/asm-generic/hugetlb.h
View File

@ -31,10 +31,12 @@ static inline pte_t huge_pte_modify(pte_t pte, pgprot_t newprot)
return pte_modify(pte, newprot);
}
#ifndef huge_pte_clear
static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
pte_t *ptep, unsigned long sz)
{
pte_clear(mm, addr, ptep);
}
#endif
#endif /* _ASM_GENERIC_HUGETLB_H */

1
include/linux/bootmem.h
View File

@ -358,6 +358,7 @@ extern void *alloc_large_system_hash(const char *tablename,
#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
* shift passed via *_hash_shift */
#define HASH_ZERO 0x00000004 /* Zero allocated hash table */
/* Only NUMA needs hash distribution. 64bit NUMA architectures have
* sufficient vmalloc space.

8
include/linux/compiler-clang.h
View File

@ -15,11 +15,3 @@
* with any version that can compile the kernel
*/
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
/*
* GCC does not warn about unused static inline functions for
* -Wunused-function. This turns out to avoid the need for complex #ifdef
* directives. Suppress the warning in clang as well.
*/
#undef inline
#define inline inline __attribute__((unused)) notrace

18
include/linux/compiler-gcc.h
View File

@ -66,18 +66,22 @@
/*
* Force always-inline if the user requests it so via the .config,
* or if gcc is too old:
* or if gcc is too old.
* GCC does not warn about unused static inline functions for
* -Wunused-function. This turns out to avoid the need for complex #ifdef
* directives. Suppress the warning in clang as well by using "unused"
* function attribute, which is redundant but not harmful for gcc.
*/
#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) || \
!defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
#define inline inline __attribute__((always_inline)) notrace
#define __inline__ __inline__ __attribute__((always_inline)) notrace
#define __inline __inline __attribute__((always_inline)) notrace
#define inline inline __attribute__((always_inline,unused)) notrace
#define __inline__ __inline__ __attribute__((always_inline,unused)) notrace
#define __inline __inline __attribute__((always_inline,unused)) notrace
#else
/* A lot of inline functions can cause havoc with function tracing */
#define inline inline notrace
#define __inline__ __inline__ notrace
#define __inline __inline notrace
#define inline inline __attribute__((unused)) notrace
#define __inline__ __inline__ __attribute__((unused)) notrace
#define __inline __inline __attribute__((unused)) notrace
#endif
#define __always_inline inline __attribute__((always_inline))

5
include/linux/filter.h
View File

@ -16,13 +16,10 @@
#include <linux/sched.h>
#include <linux/capability.h>
#include <linux/cryptohash.h>
#include <linux/set_memory.h>
#include <net/sch_generic.h>
#ifdef CONFIG_ARCH_HAS_SET_MEMORY
#include <asm/set_memory.h>
#endif
#include <uapi/linux/filter.h>
#include <uapi/linux/bpf.h>

11
include/linux/gfp.h
View File

@ -432,14 +432,13 @@ static inline void arch_alloc_page(struct page *page, int order) { }
#endif
struct page *
__alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist, nodemask_t *nodemask);
__alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid,
nodemask_t *nodemask);
static inline struct page *
__alloc_pages(gfp_t gfp_mask, unsigned int order,
struct zonelist *zonelist)
__alloc_pages(gfp_t gfp_mask, unsigned int order, int preferred_nid)
{
return __alloc_pages_nodemask(gfp_mask, order, zonelist, NULL);
return __alloc_pages_nodemask(gfp_mask, order, preferred_nid, NULL);
}
/*
@ -452,7 +451,7 @@ __alloc_pages_node(int nid, gfp_t gfp_mask, unsigned int order)
VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES);
VM_WARN_ON(!node_online(nid));
return __alloc_pages(gfp_mask, order, node_zonelist(nid, gfp_mask));
return __alloc_pages(gfp_mask, order, nid);
}
/*

7
include/linux/huge_mm.h
View File

@ -113,6 +113,7 @@ extern unsigned long thp_get_unmapped_area(struct file *filp,
extern void prep_transhuge_page(struct page *page);
extern void free_transhuge_page(struct page *page);
bool can_split_huge_page(struct page *page, int *pextra_pins);
int split_huge_page_to_list(struct page *page, struct list_head *list);
static inline int split_huge_page(struct page *page)
{
@ -231,6 +232,12 @@ static inline void prep_transhuge_page(struct page *page) {}
#define thp_get_unmapped_area NULL
static inline bool
can_split_huge_page(struct page *page, int *pextra_pins)
{
BUILD_BUG();
return false;
}
static inline int
split_huge_page_to_list(struct page *page, struct list_head *list)
{

85
include/linux/hugetlb.h
View File

@ -14,6 +14,30 @@ struct ctl_table;
struct user_struct;
struct mmu_gather;
#ifndef is_hugepd
/*
* Some architectures requires a hugepage directory format that is
* required to support multiple hugepage sizes. For example
* a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables"
* introduced the same on powerpc. This allows for a more flexible hugepage
* pagetable layout.
*/
typedef struct { unsigned long pd; } hugepd_t;
#define is_hugepd(hugepd) (0)
#define __hugepd(x) ((hugepd_t) { (x) })
static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
unsigned pdshift, unsigned long end,
int write, struct page **pages, int *nr)
{
return 0;
}
#else
extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
unsigned pdshift, unsigned long end,
int write, struct page **pages, int *nr);
#endif
#ifdef CONFIG_HUGETLB_PAGE
#include <linux/mempolicy.h>
@ -113,19 +137,27 @@ extern struct list_head huge_boot_pages;
pte_t *huge_pte_alloc(struct mm_struct *mm,
unsigned long addr, unsigned long sz);
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz);
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
int write);
struct page *follow_huge_pd(struct vm_area_struct *vma,
unsigned long address, hugepd_t hpd,
int flags, int pdshift);
struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
pmd_t *pmd, int flags);
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
pud_t *pud, int flags);
struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address,
pgd_t *pgd, int flags);
int pmd_huge(pmd_t pmd);
int pud_huge(pud_t pud);
unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
unsigned long address, unsigned long end, pgprot_t newprot);
bool is_hugetlb_entry_migration(pte_t pte);
#else /* !CONFIG_HUGETLB_PAGE */
static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
@ -147,8 +179,10 @@ static inline void hugetlb_report_meminfo(struct seq_file *m)
static inline void hugetlb_show_meminfo(void)
{
}
#define follow_huge_pd(vma, addr, hpd, flags, pdshift) NULL
#define follow_huge_pmd(mm, addr, pmd, flags) NULL
#define follow_huge_pud(mm, addr, pud, flags) NULL
#define follow_huge_pgd(mm, addr, pgd, flags) NULL
#define prepare_hugepage_range(file, addr, len) (-EINVAL)
#define pmd_huge(x) 0
#define pud_huge(x) 0
@ -157,7 +191,7 @@ static inline void hugetlb_show_meminfo(void)
#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
#define hugetlb_mcopy_atomic_pte(dst_mm, dst_pte, dst_vma, dst_addr, \
src_addr, pagep) ({ BUG(); 0; })
#define huge_pte_offset(mm, address) 0
#define huge_pte_offset(mm, address, sz) 0
static inline int dequeue_hwpoisoned_huge_page(struct page *page)
{
return 0;
@ -217,29 +251,6 @@ static inline int pud_write(pud_t pud)
}
#endif
#ifndef is_hugepd
/*
* Some architectures requires a hugepage directory format that is
* required to support multiple hugepage sizes. For example
* a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables"
* introduced the same on powerpc. This allows for a more flexible hugepage
* pagetable layout.
*/
typedef struct { unsigned long pd; } hugepd_t;
#define is_hugepd(hugepd) (0)
#define __hugepd(x) ((hugepd_t) { (x) })
static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
unsigned pdshift, unsigned long end,
int write, struct page **pages, int *nr)
{
return 0;
}
#else
extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
unsigned pdshift, unsigned long end,
int write, struct page **pages, int *nr);
#endif
#define HUGETLB_ANON_FILE "anon_hugepage"
enum {
@ -466,7 +477,11 @@ extern int dissolve_free_huge_pages(unsigned long start_pfn,
static inline bool hugepage_migration_supported(struct hstate *h)
{
#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
return huge_page_shift(h) == PMD_SHIFT;
if ((huge_page_shift(h) == PMD_SHIFT) ||
(huge_page_shift(h) == PGDIR_SHIFT))
return true;
else
return false;
#else
return false;
#endif
@ -501,6 +516,14 @@ static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
{
atomic_long_sub(l, &mm->hugetlb_usage);
}
#ifndef set_huge_swap_pte_at
static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, unsigned long sz)
{
set_huge_pte_at(mm, addr, ptep, pte);
}
#endif
#else /* CONFIG_HUGETLB_PAGE */
struct hstate {};
#define alloc_huge_page(v, a, r) NULL
@ -518,6 +541,11 @@ struct hstate {};
#define vma_mmu_pagesize(v) PAGE_SIZE
#define huge_page_order(h) 0
#define huge_page_shift(h) PAGE_SHIFT
static inline bool hstate_is_gigantic(struct hstate *h)
{
return false;
}
static inline unsigned int pages_per_huge_page(struct hstate *h)
{
return 1;
@ -545,6 +573,11 @@ static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m)
static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
{
}
static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, unsigned long sz)
{
}
#endif /* CONFIG_HUGETLB_PAGE */
static inline spinlock_t *huge_pte_lock(struct hstate *h,

7
include/linux/kmemleak.h
View File

@ -22,6 +22,7 @@
#define __KMEMLEAK_H
#include <linux/slab.h>
#include <linux/vmalloc.h>
#ifdef CONFIG_DEBUG_KMEMLEAK
@ -30,6 +31,8 @@ extern void kmemleak_alloc(const void *ptr, size_t size, int min_count,
gfp_t gfp) __ref;
extern void kmemleak_alloc_percpu(const void __percpu *ptr, size_t size,
gfp_t gfp) __ref;
extern void kmemleak_vmalloc(const struct vm_struct *area, size_t size,
gfp_t gfp) __ref;
extern void kmemleak_free(const void *ptr) __ref;
extern void kmemleak_free_part(const void *ptr, size_t size) __ref;
extern void kmemleak_free_percpu(const void __percpu *ptr) __ref;
@ -81,6 +84,10 @@ static inline void kmemleak_alloc_percpu(const void __percpu *ptr, size_t size,
gfp_t gfp)
{
}
static inline void kmemleak_vmalloc(const struct vm_struct *area, size_t size,
gfp_t gfp)
{
}
static inline void kmemleak_free(const void *ptr)
{
}

25
include/linux/memblock.h
View File

@ -57,10 +57,6 @@ struct memblock {
extern struct memblock memblock;
extern int memblock_debug;
#ifdef CONFIG_MOVABLE_NODE
/* If movable_node boot option specified */
extern bool movable_node_enabled;
#endif /* CONFIG_MOVABLE_NODE */
#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
#define __init_memblock __meminit
@ -169,27 +165,11 @@ void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start,
i != (u64)ULLONG_MAX; \
__next_reserved_mem_region(&i, p_start, p_end))
#ifdef CONFIG_MOVABLE_NODE
static inline bool memblock_is_hotpluggable(struct memblock_region *m)
{
return m->flags & MEMBLOCK_HOTPLUG;
}
static inline bool __init_memblock movable_node_is_enabled(void)
{
return movable_node_enabled;
}
#else
static inline bool memblock_is_hotpluggable(struct memblock_region *m)
{
return false;
}
static inline bool movable_node_is_enabled(void)
{
return false;
}
#endif
static inline bool memblock_is_mirror(struct memblock_region *m)
{
return m->flags & MEMBLOCK_MIRROR;
@ -296,7 +276,6 @@ phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid)
phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
#ifdef CONFIG_MOVABLE_NODE
/*
* Set the allocation direction to bottom-up or top-down.
*/
@ -314,10 +293,6 @@ static inline bool memblock_bottom_up(void)
{
return memblock.bottom_up;
}
#else
static inline void __init memblock_set_bottom_up(bool enable) {}
static inline bool memblock_bottom_up(void) { return false; }
#endif
/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)

318
include/linux/memcontrol.h
View File

@ -26,7 +26,8 @@
#include <linux/page_counter.h>
#include <linux/vmpressure.h>
#include <linux/eventfd.h>
#include <linux/mmzone.h>
#include <linux/mm.h>
#include <linux/vmstat.h>
#include <linux/writeback.h>
#include <linux/page-flags.h>
@ -44,8 +45,6 @@ enum memcg_stat_item {
MEMCG_SOCK,
/* XXX: why are these zone and not node counters? */
MEMCG_KERNEL_STACK_KB,
MEMCG_SLAB_RECLAIMABLE,
MEMCG_SLAB_UNRECLAIMABLE,
MEMCG_NR_STAT,
};
@ -100,11 +99,16 @@ struct mem_cgroup_reclaim_iter {
unsigned int generation;
};
struct lruvec_stat {
long count[NR_VM_NODE_STAT_ITEMS];
};
/*
* per-zone information in memory controller.
*/
struct mem_cgroup_per_node {
struct lruvec lruvec;
struct lruvec_stat __percpu *lruvec_stat;
unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS];
struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1];
@ -357,6 +361,17 @@ static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
}
struct mem_cgroup *mem_cgroup_from_id(unsigned short id);
static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec)
{
struct mem_cgroup_per_node *mz;
if (mem_cgroup_disabled())
return NULL;
mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
return mz->memcg;
}
/**
* parent_mem_cgroup - find the accounting parent of a memcg
* @memcg: memcg whose parent to find
@ -487,6 +502,13 @@ static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
return val;
}
static inline void __mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx, int val)
{
if (!mem_cgroup_disabled())
__this_cpu_add(memcg->stat->count[idx], val);
}
static inline void mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx, int val)
{
@ -494,18 +516,6 @@ static inline void mod_memcg_state(struct mem_cgroup *memcg,
this_cpu_add(memcg->stat->count[idx], val);
}
static inline void inc_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
{
mod_memcg_state(memcg, idx, 1);
}
static inline void dec_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
{
mod_memcg_state(memcg, idx, -1);
}
/**
* mod_memcg_page_state - update page state statistics
* @page: the page
@ -523,6 +533,13 @@ static inline void dec_memcg_state(struct mem_cgroup *memcg,
*
* Kernel pages are an exception to this, since they'll never move.
*/
static inline void __mod_memcg_page_state(struct page *page,
enum memcg_stat_item idx, int val)
{
if (page->mem_cgroup)
__mod_memcg_state(page->mem_cgroup, idx, val);
}
static inline void mod_memcg_page_state(struct page *page,
enum memcg_stat_item idx, int val)
{
@ -530,24 +547,99 @@ static inline void mod_memcg_page_state(struct page *page,
mod_memcg_state(page->mem_cgroup, idx, val);
}
static inline void inc_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
mod_memcg_page_state(page, idx, 1);
struct mem_cgroup_per_node *pn;
long val = 0;
int cpu;
if (mem_cgroup_disabled())
return node_page_state(lruvec_pgdat(lruvec), idx);
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
for_each_possible_cpu(cpu)
val += per_cpu(pn->lruvec_stat->count[idx], cpu);
if (val < 0)
val = 0;
return val;
}
static inline void dec_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
static inline void __mod_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx, int val)
{
mod_memcg_page_state(page, idx, -1);
struct mem_cgroup_per_node *pn;
__mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
if (mem_cgroup_disabled())
return;
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
__mod_memcg_state(pn->memcg, idx, val);
__this_cpu_add(pn->lruvec_stat->count[idx], val);
}
static inline void mod_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx, int val)
{
struct mem_cgroup_per_node *pn;
mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
if (mem_cgroup_disabled())
return;
pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
mod_memcg_state(pn->memcg, idx, val);
this_cpu_add(pn->lruvec_stat->count[idx], val);
}
static inline void __mod_lruvec_page_state(struct page *page,
enum node_stat_item idx, int val)
{
struct mem_cgroup_per_node *pn;
__mod_node_page_state(page_pgdat(page), idx, val);
if (mem_cgroup_disabled() || !page->mem_cgroup)
return;
__mod_memcg_state(page->mem_cgroup, idx, val);
pn = page->mem_cgroup->nodeinfo[page_to_nid(page)];
__this_cpu_add(pn->lruvec_stat->count[idx], val);
}
static inline void mod_lruvec_page_state(struct page *page,
enum node_stat_item idx, int val)
{
struct mem_cgroup_per_node *pn;
mod_node_page_state(page_pgdat(page), idx, val);
if (mem_cgroup_disabled() || !page->mem_cgroup)
return;
mod_memcg_state(page->mem_cgroup, idx, val);
pn = page->mem_cgroup->nodeinfo[page_to_nid(page)];
this_cpu_add(pn->lruvec_stat->count[idx], val);
}
unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
gfp_t gfp_mask,
unsigned long *total_scanned);
static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
enum vm_event_item idx)
static inline void count_memcg_events(struct mem_cgroup *memcg,
enum vm_event_item idx,
unsigned long count)
{
if (!mem_cgroup_disabled())
this_cpu_add(memcg->stat->events[idx], count);
}
static inline void count_memcg_page_event(struct page *page,
enum memcg_stat_item idx)
{
if (page->mem_cgroup)
count_memcg_events(page->mem_cgroup, idx, 1);
}
static inline void count_memcg_event_mm(struct mm_struct *mm,
enum vm_event_item idx)
{
struct mem_cgroup *memcg;
@ -556,8 +648,11 @@ static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
rcu_read_lock();
memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
if (likely(memcg))
if (likely(memcg)) {
this_cpu_inc(memcg->stat->events[idx]);
if (idx == OOM_KILL)
cgroup_file_notify(&memcg->events_file);
}
rcu_read_unlock();
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
@ -675,6 +770,11 @@ static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
return NULL;
}
static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec)
{
return NULL;
}
static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
{
return true;
@ -745,19 +845,21 @@ static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
return 0;
}
static inline void __mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx,
int nr)
{
}
static inline void mod_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx,
int nr)
{
}
static inline void inc_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
{
}
static inline void dec_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
static inline void __mod_memcg_page_state(struct page *page,
enum memcg_stat_item idx,
int nr)
{
}
@ -767,14 +869,34 @@ static inline void mod_memcg_page_state(struct page *page,
{
}
static inline void inc_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
return node_page_state(lruvec_pgdat(lruvec), idx);
}
static inline void dec_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
static inline void __mod_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx, int val)
{
__mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
}
static inline void mod_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx, int val)
{
mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
}
static inline void __mod_lruvec_page_state(struct page *page,
enum node_stat_item idx, int val)
{
__mod_node_page_state(page_pgdat(page), idx, val);
}
static inline void mod_lruvec_page_state(struct page *page,
enum node_stat_item idx, int val)
{
mod_node_page_state(page_pgdat(page), idx, val);
}
static inline
@ -789,12 +911,119 @@ static inline void mem_cgroup_split_huge_fixup(struct page *head)
{
}
static inline void count_memcg_events(struct mem_cgroup *memcg,
enum vm_event_item idx,
unsigned long count)
{
}
static inline void count_memcg_page_event(struct page *page,
enum memcg_stat_item idx)
{
}
static inline
void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx)
{
}
#endif /* CONFIG_MEMCG */
static inline void __inc_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
{
__mod_memcg_state(memcg, idx, 1);
}
static inline void __dec_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
{
__mod_memcg_state(memcg, idx, -1);
}
static inline void __inc_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
{
__mod_memcg_page_state(page, idx, 1);
}
static inline void __dec_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
{
__mod_memcg_page_state(page, idx, -1);
}
static inline void __inc_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
__mod_lruvec_state(lruvec, idx, 1);
}
static inline void __dec_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
__mod_lruvec_state(lruvec, idx, -1);
}
static inline void __inc_lruvec_page_state(struct page *page,
enum node_stat_item idx)
{
__mod_lruvec_page_state(page, idx, 1);
}
static inline void __dec_lruvec_page_state(struct page *page,
enum node_stat_item idx)
{
__mod_lruvec_page_state(page, idx, -1);
}
static inline void inc_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
{
mod_memcg_state(memcg, idx, 1);
}
static inline void dec_memcg_state(struct mem_cgroup *memcg,
enum memcg_stat_item idx)
{
mod_memcg_state(memcg, idx, -1);
}
static inline void inc_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
{
mod_memcg_page_state(page, idx, 1);
}
static inline void dec_memcg_page_state(struct page *page,
enum memcg_stat_item idx)
{
mod_memcg_page_state(page, idx, -1);
}
static inline void inc_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
mod_lruvec_state(lruvec, idx, 1);
}
static inline void dec_lruvec_state(struct lruvec *lruvec,
enum node_stat_item idx)
{
mod_lruvec_state(lruvec, idx, -1);
}
static inline void inc_lruvec_page_state(struct page *page,
enum node_stat_item idx)
{
mod_lruvec_page_state(page, idx, 1);
}
static inline void dec_lruvec_page_state(struct page *page,
enum node_stat_item idx)
{
mod_lruvec_page_state(page, idx, -1);
}
#ifdef CONFIG_CGROUP_WRITEBACK
struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
@ -886,19 +1115,6 @@ static inline int memcg_cache_id(struct mem_cgroup *memcg)
return memcg ? memcg->kmemcg_id : -1;
}
/**
* memcg_kmem_update_page_stat - update kmem page state statistics
* @page: the page
* @idx: page state item to account
* @val: number of pages (positive or negative)
*/
static inline void memcg_kmem_update_page_stat(struct page *page,
enum memcg_stat_item idx, int val)
{
if (memcg_kmem_enabled() && page->mem_cgroup)
this_cpu_add(page->mem_cgroup->stat->count[idx], val);
}
#else
#define for_each_memcg_cache_index(_idx) \
for (; NULL; )
@ -921,10 +1137,6 @@ static inline void memcg_put_cache_ids(void)
{
}
static inline void memcg_kmem_update_page_stat(struct page *page,
enum memcg_stat_item idx, int val)
{
}
#endif /* CONFIG_MEMCG && !CONFIG_SLOB */
#endif /* _LINUX_MEMCONTROL_H */

53
include/linux/memory_hotplug.h
View File

@ -14,6 +14,20 @@ struct memory_block;
struct resource;
#ifdef CONFIG_MEMORY_HOTPLUG
/*
* Return page for the valid pfn only if the page is online. All pfn
* walkers which rely on the fully initialized page->flags and others
* should use this rather than pfn_valid && pfn_to_page
*/
#define pfn_to_online_page(pfn) \
({ \
struct page *___page = NULL; \
unsigned long ___nr = pfn_to_section_nr(pfn); \
\
if (___nr < NR_MEM_SECTIONS && online_section_nr(___nr))\
___page = pfn_to_page(pfn); \
___page; \
})
/*
* Types for free bootmem stored in page->lru.next. These have to be in
@ -101,6 +115,12 @@ extern void __online_page_free(struct page *page);
extern int try_online_node(int nid);
extern bool memhp_auto_online;
/* If movable_node boot option specified */
extern bool movable_node_enabled;
static inline bool movable_node_is_enabled(void)
{
return movable_node_enabled;
}
#ifdef CONFIG_MEMORY_HOTREMOVE
extern bool is_pageblock_removable_nolock(struct page *page);
@ -109,9 +129,9 @@ extern int __remove_pages(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages);
#endif /* CONFIG_MEMORY_HOTREMOVE */
/* reasonably generic interface to expand the physical pages in a zone */
extern int __add_pages(int nid, struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages);
/* reasonably generic interface to expand the physical pages */
extern int __add_pages(int nid, unsigned long start_pfn,
unsigned long nr_pages, bool want_memblock);
#ifdef CONFIG_NUMA
extern int memory_add_physaddr_to_nid(u64 start);
@ -203,6 +223,14 @@ extern void set_zone_contiguous(struct zone *zone);
extern void clear_zone_contiguous(struct zone *zone);
#else /* ! CONFIG_MEMORY_HOTPLUG */
#define pfn_to_online_page(pfn) \
({ \
struct page *___page = NULL; \
if (pfn_valid(pfn)) \
___page = pfn_to_page(pfn); \
___page; \
})
/*
* Stub functions for when hotplug is off
*/
@ -244,6 +272,10 @@ static inline void put_online_mems(void) {}
static inline void mem_hotplug_begin(void) {}
static inline void mem_hotplug_done(void) {}
static inline bool movable_node_is_enabled(void)
{
return false;
}
#endif /* ! CONFIG_MEMORY_HOTPLUG */
#ifdef CONFIG_MEMORY_HOTREMOVE
@ -274,18 +306,19 @@ extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn,
void *arg, int (*func)(struct memory_block *, void *));
extern int add_memory(int nid, u64 start, u64 size);
extern int add_memory_resource(int nid, struct resource *resource, bool online);
extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default,
bool for_device);
extern int arch_add_memory(int nid, u64 start, u64 size, bool for_device);
extern int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock);
extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages);
extern int offline_pages(unsigned long start_pfn, unsigned long nr_pages);
extern bool is_memblock_offlined(struct memory_block *mem);
extern void remove_memory(int nid, u64 start, u64 size);
extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn);
extern int sparse_add_one_section(struct pglist_data *pgdat, unsigned long start_pfn);
extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms,
unsigned long map_offset);
extern struct page *sparse_decode_mem_map(unsigned long coded_mem_map,
unsigned long pnum);
extern bool zone_can_shift(unsigned long pfn, unsigned long nr_pages,
enum zone_type target, int *zone_shift);
extern bool allow_online_pfn_range(int nid, unsigned long pfn, unsigned long nr_pages,
int online_type);
extern struct zone *default_zone_for_pfn(int nid, unsigned long pfn,
unsigned long nr_pages);
#endif /* __LINUX_MEMORY_HOTPLUG_H */

12
include/linux/mempolicy.h
View File

@ -142,11 +142,10 @@ bool vma_policy_mof(struct vm_area_struct *vma);
extern void numa_default_policy(void);
extern void numa_policy_init(void);
extern void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new,
enum mpol_rebind_step step);
extern void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new);
extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
extern struct zonelist *huge_zonelist(struct vm_area_struct *vma,
extern int huge_node(struct vm_area_struct *vma,
unsigned long addr, gfp_t gfp_flags,
struct mempolicy **mpol, nodemask_t **nodemask);
extern bool init_nodemask_of_mempolicy(nodemask_t *mask);
@ -260,8 +259,7 @@ static inline void numa_default_policy(void)
}
static inline void mpol_rebind_task(struct task_struct *tsk,
const nodemask_t *new,
enum mpol_rebind_step step)
const nodemask_t *new)
{
}
@ -269,13 +267,13 @@ static inline void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new)
{
}
static inline struct zonelist *huge_zonelist(struct vm_area_struct *vma,
static inline int huge_node(struct vm_area_struct *vma,
unsigned long addr, gfp_t gfp_flags,
struct mempolicy **mpol, nodemask_t **nodemask)
{
*mpol = NULL;
*nodemask = NULL;
return node_zonelist(0, gfp_flags);
return 0;
}
static inline bool init_nodemask_of_mempolicy(nodemask_t *m)

59
include/linux/mmzone.h
View File

@ -125,8 +125,6 @@ enum zone_stat_item {
NR_ZONE_UNEVICTABLE,
NR_ZONE_WRITE_PENDING, /* Count of dirty, writeback and unstable pages */
NR_MLOCK, /* mlock()ed pages found and moved off LRU */
NR_SLAB_RECLAIMABLE,
NR_SLAB_UNRECLAIMABLE,
NR_PAGETABLE, /* used for pagetables */
NR_KERNEL_STACK_KB, /* measured in KiB */
/* Second 128 byte cacheline */
@ -152,6 +150,8 @@ enum node_stat_item {
NR_INACTIVE_FILE, /* " " " " " */
NR_ACTIVE_FILE, /* " " " " " */
NR_UNEVICTABLE, /* " " " " " */
NR_SLAB_RECLAIMABLE,
NR_SLAB_UNRECLAIMABLE,
NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */
NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */
WORKINGSET_REFAULT,
@ -532,6 +532,22 @@ static inline bool zone_is_empty(struct zone *zone)
return zone->spanned_pages == 0;
}
/*
* Return true if [start_pfn, start_pfn + nr_pages) range has a non-empty
* intersection with the given zone
*/
static inline bool zone_intersects(struct zone *zone,
unsigned long start_pfn, unsigned long nr_pages)
{
if (zone_is_empty(zone))
return false;
if (start_pfn >= zone_end_pfn(zone) ||
start_pfn + nr_pages <= zone->zone_start_pfn)
return false;
return true;
}
/*
* The "priority" of VM scanning is how much of the queues we will scan in one
* go. A value of 12 for DEF_PRIORITY implies that we will scan 1/4096th of the
@ -772,7 +788,7 @@ enum memmap_context {
MEMMAP_EARLY,
MEMMAP_HOTPLUG,
};
extern int init_currently_empty_zone(struct zone *zone, unsigned long start_pfn,
extern void init_currently_empty_zone(struct zone *zone, unsigned long start_pfn,
unsigned long size);
extern void lruvec_init(struct lruvec *lruvec);
@ -1144,9 +1160,10 @@ extern unsigned long usemap_size(void);
*/
#define SECTION_MARKED_PRESENT (1UL<<0)
#define SECTION_HAS_MEM_MAP (1UL<<1)
#define SECTION_MAP_LAST_BIT (1UL<<2)
#define SECTION_IS_ONLINE (1UL<<2)
#define SECTION_MAP_LAST_BIT (1UL<<3)
#define SECTION_MAP_MASK (~(SECTION_MAP_LAST_BIT-1))
#define SECTION_NID_SHIFT 2
#define SECTION_NID_SHIFT 3
static inline struct page *__section_mem_map_addr(struct mem_section *section)
{
@ -1175,11 +1192,30 @@ static inline int valid_section_nr(unsigned long nr)
return valid_section(__nr_to_section(nr));
}
static inline int online_section(struct mem_section *section)
{
return (section && (section->section_mem_map & SECTION_IS_ONLINE));
}
static inline int online_section_nr(unsigned long nr)
{
return online_section(__nr_to_section(nr));
}
#ifdef CONFIG_MEMORY_HOTPLUG
void online_mem_sections(unsigned long start_pfn, unsigned long end_pfn);
#ifdef CONFIG_MEMORY_HOTREMOVE
void offline_mem_sections(unsigned long start_pfn, unsigned long end_pfn);
#endif
#endif
static inline struct mem_section *__pfn_to_section(unsigned long pfn)
{
return __nr_to_section(pfn_to_section_nr(pfn));
}
extern int __highest_present_section_nr;
#ifndef CONFIG_HAVE_ARCH_PFN_VALID
static inline int pfn_valid(unsigned long pfn)
{
@ -1251,10 +1287,15 @@ unsigned long __init node_memmap_size_bytes(int, unsigned long, unsigned long);
#ifdef CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
/*
* pfn_valid() is meant to be able to tell if a given PFN has valid memmap
* associated with it or not. In FLATMEM, it is expected that holes always
* have valid memmap as long as there is valid PFNs either side of the hole.
* In SPARSEMEM, it is assumed that a valid section has a memmap for the
* entire section.
* associated with it or not. This means that a struct page exists for this
* pfn. The caller cannot assume the page is fully initialized in general.
* Hotplugable pages might not have been onlined yet. pfn_to_online_page()
* will ensure the struct page is fully online and initialized. Special pages
* (e.g. ZONE_DEVICE) are never onlined and should be treated accordingly.
*
* In FLATMEM, it is expected that holes always have valid memmap as long as
* there is valid PFNs either side of the hole. In SPARSEMEM, it is assumed
* that a valid section has a memmap for the entire section.
*
* However, an ARM, and maybe other embedded architectures in the future
* free memmap backing holes to save memory on the assumption the memmap is

35
include/linux/node.h
View File

@ -30,9 +30,38 @@ struct memory_block;
extern struct node *node_devices[];
typedef void (*node_registration_func_t)(struct node *);
#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_NUMA)
extern int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages);
#else
static inline int link_mem_sections(int nid, unsigned long start_pfn, unsigned long nr_pages)
{
return 0;
}
#endif
extern void unregister_node(struct node *node);
#ifdef CONFIG_NUMA
extern int register_one_node(int nid);
/* Core of the node registration - only memory hotplug should use this */
extern int __register_one_node(int nid);
/* Registers an online node */
static inline int register_one_node(int nid)
{
int error = 0;
if (node_online(nid)) {
struct pglist_data *pgdat = NODE_DATA(nid);
error = __register_one_node(nid);
if (error)
return error;
/* link memory sections under this node */
error = link_mem_sections(nid, pgdat->node_start_pfn, pgdat->node_spanned_pages);
}
return error;
}
extern void unregister_one_node(int nid);
extern int register_cpu_under_node(unsigned int cpu, unsigned int nid);
extern int unregister_cpu_under_node(unsigned int cpu, unsigned int nid);
@ -46,6 +75,10 @@ extern void register_hugetlbfs_with_node(node_registration_func_t doregister,
node_registration_func_t unregister);
#endif
#else
static inline int __register_one_node(int nid)
{
return 0;
}
static inline int register_one_node(int nid)
{
return 0;

4
include/linux/nodemask.h
View File

@ -387,11 +387,7 @@ enum node_states {
#else
N_HIGH_MEMORY = N_NORMAL_MEMORY,
#endif
#ifdef CONFIG_MOVABLE_NODE
N_MEMORY, /* The node has memory(regular, high, movable) */
#else
N_MEMORY = N_HIGH_MEMORY,
#endif
N_CPU, /* The node has one or more cpus */
NR_NODE_STATES
};

7
include/linux/page-flags.h
View File

@ -326,11 +326,14 @@ PAGEFLAG_FALSE(HighMem)
#ifdef CONFIG_SWAP
static __always_inline int PageSwapCache(struct page *page)
{
#ifdef CONFIG_THP_SWAP
page = compound_head(page);
#endif
return PageSwapBacked(page) && test_bit(PG_swapcache, &page->flags);
}
SETPAGEFLAG(SwapCache, swapcache, PF_NO_COMPOUND)
CLEARPAGEFLAG(SwapCache, swapcache, PF_NO_COMPOUND)
SETPAGEFLAG(SwapCache, swapcache, PF_NO_TAIL)
CLEARPAGEFLAG(SwapCache, swapcache, PF_NO_TAIL)
#else
PAGEFLAG_FALSE(SwapCache)
#endif

2
include/linux/sched.h
View File

@ -904,7 +904,7 @@ struct task_struct {
#ifdef CONFIG_NUMA
/* Protected by alloc_lock: */
struct mempolicy *mempolicy;
short il_next;
short il_prev;
short pref_node_fork;
#endif
#ifdef CONFIG_NUMA_BALANCING

20
include/linux/set_memory.h Normal file
View File

@ -0,0 +1,20 @@
/*
* Copyright 2017, Michael Ellerman, IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation;
*/
#ifndef _LINUX_SET_MEMORY_H_
#define _LINUX_SET_MEMORY_H_
#ifdef CONFIG_ARCH_HAS_SET_MEMORY
#include <asm/set_memory.h>
#else
static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
#endif
#endif /* _LINUX_SET_MEMORY_H_ */

34
include/linux/slub_def.h
View File

@ -41,12 +41,31 @@ struct kmem_cache_cpu {
void **freelist; /* Pointer to next available object */
unsigned long tid; /* Globally unique transaction id */
struct page *page; /* The slab from which we are allocating */
#ifdef CONFIG_SLUB_CPU_PARTIAL
struct page *partial; /* Partially allocated frozen slabs */
#endif
#ifdef CONFIG_SLUB_STATS
unsigned stat[NR_SLUB_STAT_ITEMS];
#endif
};
#ifdef CONFIG_SLUB_CPU_PARTIAL
#define slub_percpu_partial(c) ((c)->partial)
#define slub_set_percpu_partial(c, p) \
({ \
slub_percpu_partial(c) = (p)->next; \
})
#define slub_percpu_partial_read_once(c) READ_ONCE(slub_percpu_partial(c))
#else
#define slub_percpu_partial(c) NULL
#define slub_set_percpu_partial(c, p)
#define slub_percpu_partial_read_once(c) NULL
#endif // CONFIG_SLUB_CPU_PARTIAL
/*
* Word size structure that can be atomically updated or read and that
* contains both the order and the number of objects that a slab of the
@ -67,7 +86,9 @@ struct kmem_cache {
int size; /* The size of an object including meta data */
int object_size; /* The size of an object without meta data */
int offset; /* Free pointer offset. */
#ifdef CONFIG_SLUB_CPU_PARTIAL
int cpu_partial; /* Number of per cpu partial objects to keep around */
#endif
struct kmem_cache_order_objects oo;
/* Allocation and freeing of slabs */
@ -79,9 +100,9 @@ struct kmem_cache {
int inuse; /* Offset to metadata */
int align; /* Alignment */
int reserved; /* Reserved bytes at the end of slabs */
int red_left_pad; /* Left redzone padding size */
const char *name; /* Name (only for display!) */
struct list_head list; /* List of slab caches */
int red_left_pad; /* Left redzone padding size */
#ifdef CONFIG_SYSFS
struct kobject kobj; /* For sysfs */
struct work_struct kobj_remove_work;
@ -112,6 +133,17 @@ struct kmem_cache {
struct kmem_cache_node *node[MAX_NUMNODES];
};
#ifdef CONFIG_SLUB_CPU_PARTIAL
#define slub_cpu_partial(s) ((s)->cpu_partial)
#define slub_set_cpu_partial(s, n) \
({ \
slub_cpu_partial(s) = (n); \
})
#else
#define slub_cpu_partial(s) (0)
#define slub_set_cpu_partial(s, n)
#endif // CONFIG_SLUB_CPU_PARTIAL
#ifdef CONFIG_SYSFS
#define SLAB_SUPPORTS_SYSFS
void sysfs_slab_release(struct kmem_cache *);

19
include/linux/swap.h
View File

@ -353,7 +353,7 @@ extern struct address_space *swapper_spaces[];
>> SWAP_ADDRESS_SPACE_SHIFT])
extern unsigned long total_swapcache_pages(void);
extern void show_swap_cache_info(void);
extern int add_to_swap(struct page *, struct list_head *list);
extern int add_to_swap(struct page *page);
extern int add_to_swap_cache(struct page *, swp_entry_t, gfp_t);
extern int __add_to_swap_cache(struct page *page, swp_entry_t entry);
extern void __delete_from_swap_cache(struct page *);
@ -386,15 +386,15 @@ static inline long get_nr_swap_pages(void)
}
extern void si_swapinfo(struct sysinfo *);
extern swp_entry_t get_swap_page(void);
extern swp_entry_t get_swap_page(struct page *page);
extern void put_swap_page(struct page *page, swp_entry_t entry);
extern swp_entry_t get_swap_page_of_type(int);
extern int get_swap_pages(int n, swp_entry_t swp_entries[]);
extern int get_swap_pages(int n, bool cluster, swp_entry_t swp_entries[]);
extern int add_swap_count_continuation(swp_entry_t, gfp_t);
extern void swap_shmem_alloc(swp_entry_t);
extern int swap_duplicate(swp_entry_t);
extern int swapcache_prepare(swp_entry_t);
extern void swap_free(swp_entry_t);
extern void swapcache_free(swp_entry_t);
extern void swapcache_free_entries(swp_entry_t *entries, int n);
extern int free_swap_and_cache(swp_entry_t);
extern int swap_type_of(dev_t, sector_t, struct block_device **);
@ -453,7 +453,7 @@ static inline void swap_free(swp_entry_t swp)
{
}
static inline void swapcache_free(swp_entry_t swp)
static inline void put_swap_page(struct page *page, swp_entry_t swp)
{
}
@ -473,7 +473,7 @@ static inline struct page *lookup_swap_cache(swp_entry_t swp)
return NULL;
}
static inline int add_to_swap(struct page *page, struct list_head *list)
static inline int add_to_swap(struct page *page)
{
return 0;
}
@ -515,7 +515,7 @@ static inline int try_to_free_swap(struct page *page)
return 0;
}
static inline swp_entry_t get_swap_page(void)
static inline swp_entry_t get_swap_page(struct page *page)
{
swp_entry_t entry;
entry.val = 0;
@ -548,7 +548,7 @@ static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
#ifdef CONFIG_MEMCG_SWAP
extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);
extern int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry);
extern void mem_cgroup_uncharge_swap(swp_entry_t entry);
extern void mem_cgroup_uncharge_swap(swp_entry_t entry, unsigned int nr_pages);
extern long mem_cgroup_get_nr_swap_pages(struct mem_cgroup *memcg);
extern bool mem_cgroup_swap_full(struct page *page);
#else
@ -562,7 +562,8 @@ static inline int mem_cgroup_try_charge_swap(struct page *page,
return 0;
}
static inline void mem_cgroup_uncharge_swap(swp_entry_t entry)
static inline void mem_cgroup_uncharge_swap(swp_entry_t entry,
unsigned int nr_pages)
{
}

6
include/linux/swap_cgroup.h
View File

@ -7,7 +7,8 @@
extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent,
unsigned short old, unsigned short new);
extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id);
extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id,
unsigned int nr_ents);
extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent);
extern int swap_cgroup_swapon(int type, unsigned long max_pages);
extern void swap_cgroup_swapoff(int type);
@ -15,7 +16,8 @@ extern void swap_cgroup_swapoff(int type);
#else
static inline
unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id)
unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id,
unsigned int nr_ents)
{
return 0;
}

1
include/linux/vm_event_item.h
View File

@ -41,6 +41,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
KSWAPD_LOW_WMARK_HIT_QUICKLY, KSWAPD_HIGH_WMARK_HIT_QUICKLY,
PAGEOUTRUN, PGROTATED,
DROP_PAGECACHE, DROP_SLAB,
OOM_KILL,
#ifdef CONFIG_NUMA_BALANCING
NUMA_PTE_UPDATES,
NUMA_HUGE_PTE_UPDATES,

1
include/linux/vmstat.h
View File

@ -3,7 +3,6 @@
#include <linux/types.h>
#include <linux/percpu.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/vm_event_item.h>
#include <linux/atomic.h>

1
include/uapi/linux/magic.h
View File

@ -42,6 +42,7 @@
#define MSDOS_SUPER_MAGIC 0x4d44 /* MD */
#define NCP_SUPER_MAGIC 0x564c /* Guess, what 0x564c is :-) */
#define NFS_SUPER_MAGIC 0x6969
#define OCFS2_SUPER_MAGIC 0x7461636f
#define OPENPROM_SUPER_MAGIC 0x9fa1
#define QNX4_SUPER_MAGIC 0x002f /* qnx4 fs detection */
#define QNX6_SUPER_MAGIC 0x68191122 /* qnx6 fs detection */

8
include/uapi/linux/mempolicy.h
View File

@ -24,13 +24,6 @@ enum {
MPOL_MAX, /* always last member of enum */
};
enum mpol_rebind_step {
MPOL_REBIND_ONCE, /* do rebind work at once(not by two step) */
MPOL_REBIND_STEP1, /* first step(set all the newly nodes) */
MPOL_REBIND_STEP2, /* second step(clean all the disallowed nodes)*/
MPOL_REBIND_NSTEP,
};
/* Flags for set_mempolicy */
#define MPOL_F_STATIC_NODES (1 << 15)
#define MPOL_F_RELATIVE_NODES (1 << 14)
@ -65,7 +58,6 @@ enum mpol_rebind_step {
*/
#define MPOL_F_SHARED (1 << 0) /* identify shared policies */
#define MPOL_F_LOCAL (1 << 1) /* preferred local allocation */
#define MPOL_F_REBINDING (1 << 2) /* identify policies in rebinding */
#define MPOL_F_MOF (1 << 3) /* this policy wants migrate on fault */
#define MPOL_F_MORON (1 << 4) /* Migrate On protnone Reference On Node */

14
init/Kconfig
View File

@ -1548,6 +1548,20 @@ config SLOB
endchoice
config SLAB_MERGE_DEFAULT
bool "Allow slab caches to be merged"
default y
help
For reduced kernel memory fragmentation, slab caches can be
merged when they share the same size and other characteristics.
This carries a risk of kernel heap overflows being able to
overwrite objects from merged caches (and more easily control
cache layout), which makes such heap attacks easier to exploit
by attackers. By keeping caches unmerged, these kinds of exploits
can usually only damage objects in the same cache. To disable
merging at runtime, "slab_nomerge" can be passed on the kernel
command line.
config SLAB_FREELIST_RANDOM
default n
depends on SLAB || SLUB

33
kernel/cgroup/cpuset.c
View File

@ -1038,40 +1038,25 @@ static void cpuset_post_attach(void)
* @tsk: the task to change
* @newmems: new nodes that the task will be set
*
* In order to avoid seeing no nodes if the old and new nodes are disjoint,
* we structure updates as setting all new allowed nodes, then clearing newly
* disallowed ones.
* We use the mems_allowed_seq seqlock to safely update both tsk->mems_allowed
* and rebind an eventual tasks' mempolicy. If the task is allocating in
* parallel, it might temporarily see an empty intersection, which results in
* a seqlock check and retry before OOM or allocation failure.
*/
static void cpuset_change_task_nodemask(struct task_struct *tsk,
nodemask_t *newmems)
{
bool need_loop;
task_lock(tsk);
/*
* Determine if a loop is necessary if another thread is doing
* read_mems_allowed_begin(). If at least one node remains unchanged and
* tsk does not have a mempolicy, then an empty nodemask will not be
* possible when mems_allowed is larger than a word.
*/
need_loop = task_has_mempolicy(tsk) ||
!nodes_intersects(*newmems, tsk->mems_allowed);
if (need_loop) {
local_irq_disable();
write_seqcount_begin(&tsk->mems_allowed_seq);
}
local_irq_disable();
write_seqcount_begin(&tsk->mems_allowed_seq);
nodes_or(tsk->mems_allowed, tsk->mems_allowed, *newmems);
mpol_rebind_task(tsk, newmems, MPOL_REBIND_STEP1);
mpol_rebind_task(tsk, newmems, MPOL_REBIND_STEP2);
mpol_rebind_task(tsk, newmems);
tsk->mems_allowed = *newmems;
if (need_loop) {
write_seqcount_end(&tsk->mems_allowed_seq);
local_irq_enable();
}
write_seqcount_end(&tsk->mems_allowed_seq);
local_irq_enable();
task_unlock(tsk);
}

1
kernel/exit.c
View File

@ -51,7 +51,6 @@
#include <linux/task_io_accounting_ops.h>
#include <linux/tracehook.h>
#include <linux/fs_struct.h>
#include <linux/userfaultfd_k.h>
#include <linux/init_task.h>
#include <linux/perf_event.h>
#include <trace/events/sched.h>

2
kernel/extable.c
View File

@ -69,7 +69,7 @@ static inline int init_kernel_text(unsigned long addr)
return 0;
}
int core_kernel_text(unsigned long addr)
int notrace core_kernel_text(unsigned long addr)
{
if (addr >= (unsigned long)_stext &&
addr < (unsigned long)_etext)

8
kernel/fork.c
View File

@ -326,8 +326,8 @@ static void account_kernel_stack(struct task_struct *tsk, int account)
}
/* All stack pages belong to the same memcg. */
memcg_kmem_update_page_stat(vm->pages[0], MEMCG_KERNEL_STACK_KB,
account * (THREAD_SIZE / 1024));
mod_memcg_page_state(vm->pages[0], MEMCG_KERNEL_STACK_KB,
account * (THREAD_SIZE / 1024));
} else {
/*
* All stack pages are in the same zone and belong to the
@ -338,8 +338,8 @@ static void account_kernel_stack(struct task_struct *tsk, int account)
mod_zone_page_state(page_zone(first_page), NR_KERNEL_STACK_KB,
THREAD_SIZE / 1024 * account);
memcg_kmem_update_page_stat(first_page, MEMCG_KERNEL_STACK_KB,
account * (THREAD_SIZE / 1024));
mod_memcg_page_state(first_page, MEMCG_KERNEL_STACK_KB,
account * (THREAD_SIZE / 1024));
}
}

3
kernel/locking/qspinlock_paravirt.h
View File

@ -193,7 +193,8 @@ void __init __pv_init_lock_hash(void)
*/
pv_lock_hash = alloc_large_system_hash("PV qspinlock",
sizeof(struct pv_hash_entry),
pv_hash_size, 0, HASH_EARLY,
pv_hash_size, 0,
HASH_EARLY | HASH_ZERO,
&pv_lock_hash_bits, NULL,
pv_hash_size, pv_hash_size);
}

6
kernel/memremap.c
View File

@ -358,7 +358,11 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
goto err_pfn_remap;
mem_hotplug_begin();
error = arch_add_memory(nid, align_start, align_size, true);
error = arch_add_memory(nid, align_start, align_size, false);
if (!error)
move_pfn_range_to_zone(&NODE_DATA(nid)->node_zones[ZONE_DEVICE],
align_start >> PAGE_SHIFT,
align_size >> PAGE_SHIFT);
mem_hotplug_done();
if (error)
goto err_add_memory;

4
kernel/module.c
View File

@ -49,9 +49,7 @@
#include <linux/rculist.h>
#include <linux/uaccess.h>
#include <asm/cacheflush.h>
#ifdef CONFIG_STRICT_MODULE_RWX
#include <asm/set_memory.h>
#endif
#include <linux/set_memory.h>
#include <asm/mmu_context.h>
#include <linux/license.h>
#include <asm/sections.h>

7
kernel/pid.c
View File

@ -575,16 +575,13 @@ struct pid *find_ge_pid(int nr, struct pid_namespace *ns)
*/
void __init pidhash_init(void)
{
unsigned int i, pidhash_size;
unsigned int pidhash_size;
pid_hash = alloc_large_system_hash("PID", sizeof(*pid_hash), 0, 18,
HASH_EARLY | HASH_SMALL,
HASH_EARLY | HASH_SMALL | HASH_ZERO,
&pidhash_shift, NULL,
0, 4096);
pidhash_size = 1U << pidhash_shift;
for (i = 0; i < pidhash_size; i++)
INIT_HLIST_HEAD(&pid_hash[i]);
}
void __init pidmap_init(void)

4
kernel/power/snapshot.c
View File

@ -30,15 +30,13 @@
#include <linux/slab.h>
#include <linux/compiler.h>
#include <linux/ktime.h>
#include <linux/set_memory.h>
#include <linux/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/io.h>
#ifdef CONFIG_ARCH_HAS_SET_MEMORY
#include <asm/set_memory.h>
#endif
#include "power.h"

38
mm/Kconfig
View File

@ -149,32 +149,6 @@ config NO_BOOTMEM
config MEMORY_ISOLATION
bool
config MOVABLE_NODE
bool "Enable to assign a node which has only movable memory"
depends on HAVE_MEMBLOCK
depends on NO_BOOTMEM
depends on X86_64 || OF_EARLY_FLATTREE || MEMORY_HOTPLUG
depends on NUMA
default n
help
Allow a node to have only movable memory. Pages used by the kernel,
such as direct mapping pages cannot be migrated. So the corresponding
memory device cannot be hotplugged. This option allows the following
two things:
- When the system is booting, node full of hotpluggable memory can
be arranged to have only movable memory so that the whole node can
be hot-removed. (need movable_node boot option specified).
- After the system is up, the option allows users to online all the
memory of a node as movable memory so that the whole node can be
hot-removed.
Users who don't use the memory hotplug feature are fine with this
option on since they don't specify movable_node boot option or they
don't online memory as movable.
Say Y here if you want to hotplug a whole node.
Say N here if you want kernel to use memory on all nodes evenly.
#
# Only be set on architectures that have completely implemented memory hotplug
# feature. If you are not sure, don't touch it.
@ -446,6 +420,18 @@ choice
benefit.
endchoice
config ARCH_WANTS_THP_SWAP
def_bool n
config THP_SWAP
def_bool y
depends on TRANSPARENT_HUGEPAGE && ARCH_WANTS_THP_SWAP
help
Swap transparent huge pages in one piece, without splitting.
XXX: For now this only does clustered swap space allocation.
For selection by architectures with reasonable THP sizes.
config TRANSPARENT_HUGE_PAGECACHE
def_bool y
depends on TRANSPARENT_HUGEPAGE

5
mm/compaction.c
View File

@ -236,10 +236,9 @@ static void __reset_isolation_suitable(struct zone *zone)
cond_resched();
if (!pfn_valid(pfn))
page = pfn_to_online_page(pfn);
if (!page)
continue;
page = pfn_to_page(pfn);
if (zone != page_zone(page))
continue;

2
mm/filemap.c
View File

@ -2265,7 +2265,7 @@ int filemap_fault(struct vm_fault *vmf)
/* No page in the page cache at all */
do_sync_mmap_readahead(vmf->vma, ra, file, offset);
count_vm_event(PGMAJFAULT);
mem_cgroup_count_vm_event(vmf->vma->vm_mm, PGMAJFAULT);
count_memcg_event_mm(vmf->vma->vm_mm, PGMAJFAULT);
ret = VM_FAULT_MAJOR;
retry_find:
page = find_get_page(mapping, offset);

203
mm/gup.c
View File

@ -208,68 +208,16 @@ no_page:
return no_page_table(vma, flags);
}
/**
* follow_page_mask - look up a page descriptor from a user-virtual address
* @vma: vm_area_struct mapping @address
* @address: virtual address to look up
* @flags: flags modifying lookup behaviour
* @page_mask: on output, *page_mask is set according to the size of the page
*
* @flags can have FOLL_ flags set, defined in <linux/mm.h>
*
* Returns the mapped (struct page *), %NULL if no mapping exists, or
* an error pointer if there is a mapping to something not represented
* by a page descriptor (see also vm_normal_page()).
*/
struct page *follow_page_mask(struct vm_area_struct *vma,
unsigned long address, unsigned int flags,
unsigned int *page_mask)
static struct page *follow_pmd_mask(struct vm_area_struct *vma,
unsigned long address, pud_t *pudp,
unsigned int flags, unsigned int *page_mask)
{
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
spinlock_t *ptl;
struct page *page;
struct mm_struct *mm = vma->vm_mm;
*page_mask = 0;
page = follow_huge_addr(mm, address, flags & FOLL_WRITE);
if (!IS_ERR(page)) {
BUG_ON(flags & FOLL_GET);
return page;
}
pgd = pgd_offset(mm, address);
if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
return no_page_table(vma, flags);
p4d = p4d_offset(pgd, address);
if (p4d_none(*p4d))
return no_page_table(vma, flags);
BUILD_BUG_ON(p4d_huge(*p4d));
if (unlikely(p4d_bad(*p4d)))
return no_page_table(vma, flags);
pud = pud_offset(p4d, address);
if (pud_none(*pud))
return no_page_table(vma, flags);
if (pud_huge(*pud) && vma->vm_flags & VM_HUGETLB) {
page = follow_huge_pud(mm, address, pud, flags);
if (page)
return page;
return no_page_table(vma, flags);
}
if (pud_devmap(*pud)) {
ptl = pud_lock(mm, pud);
page = follow_devmap_pud(vma, address, pud, flags);
spin_unlock(ptl);
if (page)
return page;
}
if (unlikely(pud_bad(*pud)))
return no_page_table(vma, flags);
pmd = pmd_offset(pud, address);
pmd = pmd_offset(pudp, address);
if (pmd_none(*pmd))
return no_page_table(vma, flags);
if (pmd_huge(*pmd) && vma->vm_flags & VM_HUGETLB) {
@ -278,6 +226,14 @@ struct page *follow_page_mask(struct vm_area_struct *vma,
return page;
return no_page_table(vma, flags);
}
if (is_hugepd(__hugepd(pmd_val(*pmd)))) {
page = follow_huge_pd(vma, address,
__hugepd(pmd_val(*pmd)), flags,
PMD_SHIFT);
if (page)
return page;
return no_page_table(vma, flags);
}
if (pmd_devmap(*pmd)) {
ptl = pmd_lock(mm, pmd);
page = follow_devmap_pmd(vma, address, pmd, flags);
@ -319,13 +275,131 @@ struct page *follow_page_mask(struct vm_area_struct *vma,
return ret ? ERR_PTR(ret) :
follow_page_pte(vma, address, pmd, flags);
}
page = follow_trans_huge_pmd(vma, address, pmd, flags);
spin_unlock(ptl);
*page_mask = HPAGE_PMD_NR - 1;
return page;
}
static struct page *follow_pud_mask(struct vm_area_struct *vma,
unsigned long address, p4d_t *p4dp,
unsigned int flags, unsigned int *page_mask)
{
pud_t *pud;
spinlock_t *ptl;
struct page *page;
struct mm_struct *mm = vma->vm_mm;
pud = pud_offset(p4dp, address);
if (pud_none(*pud))
return no_page_table(vma, flags);
if (pud_huge(*pud) && vma->vm_flags & VM_HUGETLB) {
page = follow_huge_pud(mm, address, pud, flags);
if (page)
return page;
return no_page_table(vma, flags);
}
if (is_hugepd(__hugepd(pud_val(*pud)))) {
page = follow_huge_pd(vma, address,
__hugepd(pud_val(*pud)), flags,
PUD_SHIFT);
if (page)
return page;
return no_page_table(vma, flags);
}
if (pud_devmap(*pud)) {
ptl = pud_lock(mm, pud);
page = follow_devmap_pud(vma, address, pud, flags);
spin_unlock(ptl);
if (page)
return page;
}
if (unlikely(pud_bad(*pud)))
return no_page_table(vma, flags);
return follow_pmd_mask(vma, address, pud, flags, page_mask);
}
static struct page *follow_p4d_mask(struct vm_area_struct *vma,
unsigned long address, pgd_t *pgdp,
unsigned int flags, unsigned int *page_mask)
{
p4d_t *p4d;
struct page *page;
p4d = p4d_offset(pgdp, address);
if (p4d_none(*p4d))
return no_page_table(vma, flags);
BUILD_BUG_ON(p4d_huge(*p4d));
if (unlikely(p4d_bad(*p4d)))
return no_page_table(vma, flags);
if (is_hugepd(__hugepd(p4d_val(*p4d)))) {
page = follow_huge_pd(vma, address,
__hugepd(p4d_val(*p4d)), flags,
P4D_SHIFT);
if (page)
return page;
return no_page_table(vma, flags);
}
return follow_pud_mask(vma, address, p4d, flags, page_mask);
}
/**
* follow_page_mask - look up a page descriptor from a user-virtual address
* @vma: vm_area_struct mapping @address
* @address: virtual address to look up
* @flags: flags modifying lookup behaviour
* @page_mask: on output, *page_mask is set according to the size of the page
*
* @flags can have FOLL_ flags set, defined in <linux/mm.h>
*
* Returns the mapped (struct page *), %NULL if no mapping exists, or
* an error pointer if there is a mapping to something not represented
* by a page descriptor (see also vm_normal_page()).
*/
struct page *follow_page_mask(struct vm_area_struct *vma,
unsigned long address, unsigned int flags,
unsigned int *page_mask)
{
pgd_t *pgd;
struct page *page;
struct mm_struct *mm = vma->vm_mm;
*page_mask = 0;
/* make this handle hugepd */
page = follow_huge_addr(mm, address, flags & FOLL_WRITE);
if (!IS_ERR(page)) {
BUG_ON(flags & FOLL_GET);
return page;
}
pgd = pgd_offset(mm, address);
if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
return no_page_table(vma, flags);
if (pgd_huge(*pgd)) {
page = follow_huge_pgd(mm, address, pgd, flags);
if (page)
return page;
return no_page_table(vma, flags);
}
if (is_hugepd(__hugepd(pgd_val(*pgd)))) {
page = follow_huge_pd(vma, address,
__hugepd(pgd_val(*pgd)), flags,
PGDIR_SHIFT);
if (page)
return page;
return no_page_table(vma, flags);
}
return follow_p4d_mask(vma, address, pgd, flags, page_mask);
}
static int get_gate_page(struct mm_struct *mm, unsigned long address,
unsigned int gup_flags, struct vm_area_struct **vma,
struct page **page)
@ -1349,16 +1423,15 @@ static int gup_huge_pmd(pmd_t orig, pmd_t *pmdp, unsigned long addr,
return __gup_device_huge_pmd(orig, addr, end, pages, nr);
refs = 0;
head = pmd_page(orig);
page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
page = pmd_page(orig) + ((addr & ~PMD_MASK) >> PAGE_SHIFT);
do {
VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
(*nr)++;
page++;
refs++;
} while (addr += PAGE_SIZE, addr != end);
head = compound_head(pmd_page(orig));
if (!page_cache_add_speculative(head, refs)) {
*nr -= refs;
return 0;
@ -1388,16 +1461,15 @@ static int gup_huge_pud(pud_t orig, pud_t *pudp, unsigned long addr,
return __gup_device_huge_pud(orig, addr, end, pages, nr);
refs = 0;
head = pud_page(orig);
page = head + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
page = pud_page(orig) + ((addr & ~PUD_MASK) >> PAGE_SHIFT);
do {
VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
(*nr)++;
page++;
refs++;
} while (addr += PAGE_SIZE, addr != end);
head = compound_head(pud_page(orig));
if (!page_cache_add_speculative(head, refs)) {
*nr -= refs;
return 0;
@ -1426,16 +1498,15 @@ static int gup_huge_pgd(pgd_t orig, pgd_t *pgdp, unsigned long addr,
BUILD_BUG_ON(pgd_devmap(orig));
refs = 0;
head = pgd_page(orig);
page = head + ((addr & ~PGDIR_MASK) >> PAGE_SHIFT);
page = pgd_page(orig) + ((addr & ~PGDIR_MASK) >> PAGE_SHIFT);
do {
VM_BUG_ON_PAGE(compound_head(page) != head, page);
pages[*nr] = page;
(*nr)++;
page++;
refs++;
} while (addr += PAGE_SIZE, addr != end);
head = compound_head(pgd_page(orig));
if (!page_cache_add_speculative(head, refs)) {
*nr -= refs;
return 0;

31
mm/huge_memory.c
View File

@ -1575,8 +1575,8 @@ bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
get_page(page);
spin_unlock(ptl);
split_huge_page(page);
put_page(page);
unlock_page(page);
put_page(page);
goto out_unlocked;
}
@ -2203,7 +2203,7 @@ static void __split_huge_page_tail(struct page *head, int tail,
* atomic_set() here would be safe on all archs (and not only on x86),
* it's safer to use atomic_inc()/atomic_add().
*/
if (PageAnon(head)) {
if (PageAnon(head) && !PageSwapCache(head)) {
page_ref_inc(page_tail);
} else {
/* Additional pin to radix tree */
@ -2214,6 +2214,7 @@ static void __split_huge_page_tail(struct page *head, int tail,
page_tail->flags |= (head->flags &
((1L << PG_referenced) |
(1L << PG_swapbacked) |
(1L << PG_swapcache) |
(1L << PG_mlocked) |
(1L << PG_uptodate) |
(1L << PG_active) |
@ -2276,7 +2277,11 @@ static void __split_huge_page(struct page *page, struct list_head *list,
ClearPageCompound(head);
/* See comment in __split_huge_page_tail() */
if (PageAnon(head)) {
page_ref_inc(head);
/* Additional pin to radix tree of swap cache */
if (PageSwapCache(head))
page_ref_add(head, 2);
else
page_ref_inc(head);
} else {
/* Additional pin to radix tree */
page_ref_add(head, 2);
@ -2385,6 +2390,21 @@ int page_trans_huge_mapcount(struct page *page, int *total_mapcount)
return ret;
}
/* Racy check whether the huge page can be split */
bool can_split_huge_page(struct page *page, int *pextra_pins)
{
int extra_pins;
/* Additional pins from radix tree */
if (PageAnon(page))
extra_pins = PageSwapCache(page) ? HPAGE_PMD_NR : 0;
else
extra_pins = HPAGE_PMD_NR;
if (pextra_pins)
*pextra_pins = extra_pins;
return total_mapcount(page) == page_count(page) - extra_pins - 1;
}
/*
* This function splits huge page into normal pages. @page can point to any
* subpage of huge page to split. Split doesn't change the position of @page.
@ -2432,7 +2452,6 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
ret = -EBUSY;
goto out;
}
extra_pins = 0;
mapping = NULL;
anon_vma_lock_write(anon_vma);
} else {
@ -2444,8 +2463,6 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
goto out;
}
/* Addidional pins from radix tree */
extra_pins = HPAGE_PMD_NR;
anon_vma = NULL;
i_mmap_lock_read(mapping);
}
@ -2454,7 +2471,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
* Racy check if we can split the page, before freeze_page() will
* split PMDs
*/
if (total_mapcount(head) != page_count(head) - extra_pins - 1) {
if (!can_split_huge_page(head, &extra_pins)) {
ret = -EBUSY;
goto out_unlock;
}

98
mm/hugetlb.c
View File

@ -867,7 +867,7 @@ static void enqueue_huge_page(struct hstate *h, struct page *page)
h->free_huge_pages_node[nid]++;
}
static struct page *dequeue_huge_page_node(struct hstate *h, int nid)
static struct page *dequeue_huge_page_node_exact(struct hstate *h, int nid)
{
struct page *page;
@ -887,6 +887,22 @@ static struct page *dequeue_huge_page_node(struct hstate *h, int nid)
return page;
}
static struct page *dequeue_huge_page_node(struct hstate *h, int nid)
{
struct page *page;
int node;
if (nid != NUMA_NO_NODE)
return dequeue_huge_page_node_exact(h, nid);
for_each_online_node(node) {
page = dequeue_huge_page_node_exact(h, node);
if (page)
return page;
}
return NULL;
}
/* Movability of hugepages depends on migration support. */
static inline gfp_t htlb_alloc_mask(struct hstate *h)
{
@ -904,6 +920,8 @@ static struct page *dequeue_huge_page_vma(struct hstate *h,
struct page *page = NULL;
struct mempolicy *mpol;
nodemask_t *nodemask;
gfp_t gfp_mask;
int nid;
struct zonelist *zonelist;
struct zone *zone;
struct zoneref *z;
@ -924,12 +942,13 @@ static struct page *dequeue_huge_page_vma(struct hstate *h,
retry_cpuset:
cpuset_mems_cookie = read_mems_allowed_begin();
zonelist = huge_zonelist(vma, address,
htlb_alloc_mask(h), &mpol, &nodemask);
gfp_mask = htlb_alloc_mask(h);
nid = huge_node(vma, address, gfp_mask, &mpol, &nodemask);
zonelist = node_zonelist(nid, gfp_mask);
for_each_zone_zonelist_nodemask(zone, z, zonelist,
MAX_NR_ZONES - 1, nodemask) {
if (cpuset_zone_allowed(zone, htlb_alloc_mask(h))) {
if (cpuset_zone_allowed(zone, gfp_mask)) {
page = dequeue_huge_page_node(h, zone_to_nid(zone));
if (page) {
if (avoid_reserve)
@ -1024,9 +1043,7 @@ static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed)
((node = hstate_next_node_to_free(hs, mask)) || 1); \
nr_nodes--)
#if defined(CONFIG_ARCH_HAS_GIGANTIC_PAGE) && \
((defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || \
defined(CONFIG_CMA))
#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
static void destroy_compound_gigantic_page(struct page *page,
unsigned int order)
{
@ -1158,8 +1175,7 @@ static int alloc_fresh_gigantic_page(struct hstate *h,
return 0;
}
static inline bool gigantic_page_supported(void) { return true; }
#else
#else /* !CONFIG_ARCH_HAS_GIGANTIC_PAGE */
static inline bool gigantic_page_supported(void) { return false; }
static inline void free_gigantic_page(struct page *page, unsigned int order) { }
static inline void destroy_compound_gigantic_page(struct page *page,
@ -1545,13 +1561,13 @@ static struct page *__hugetlb_alloc_buddy_huge_page(struct hstate *h,
do {
struct page *page;
struct mempolicy *mpol;
struct zonelist *zl;
int nid;
nodemask_t *nodemask;
cpuset_mems_cookie = read_mems_allowed_begin();
zl = huge_zonelist(vma, addr, gfp, &mpol, &nodemask);
nid = huge_node(vma, addr, gfp, &mpol, &nodemask);
mpol_cond_put(mpol);
page = __alloc_pages_nodemask(gfp, order, zl, nodemask);
page = __alloc_pages_nodemask(gfp, order, nid, nodemask);
if (page)
return page;
} while (read_mems_allowed_retry(cpuset_mems_cookie));
@ -3185,17 +3201,17 @@ static void set_huge_ptep_writable(struct vm_area_struct *vma,
update_mmu_cache(vma, address, ptep);
}
static int is_hugetlb_entry_migration(pte_t pte)
bool is_hugetlb_entry_migration(pte_t pte)
{
swp_entry_t swp;
if (huge_pte_none(pte) || pte_present(pte))
return 0;
return false;
swp = pte_to_swp_entry(pte);
if (non_swap_entry(swp) && is_migration_entry(swp))
return 1;
return true;
else
return 0;
return false;
}
static int is_hugetlb_entry_hwpoisoned(pte_t pte)
@ -3233,7 +3249,7 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
for (addr = vma->vm_start; addr < vma->vm_end; addr += sz) {
spinlock_t *src_ptl, *dst_ptl;
src_pte = huge_pte_offset(src, addr);
src_pte = huge_pte_offset(src, addr, sz);
if (!src_pte)
continue;
dst_pte = huge_pte_alloc(dst, addr, sz);
@ -3263,9 +3279,10 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
*/
make_migration_entry_read(&swp_entry);
entry = swp_entry_to_pte(swp_entry);
set_huge_pte_at(src, addr, src_pte, entry);
set_huge_swap_pte_at(src, addr, src_pte,
entry, sz);
}
set_huge_pte_at(dst, addr, dst_pte, entry);
set_huge_swap_pte_at(dst, addr, dst_pte, entry, sz);
} else {
if (cow) {
huge_ptep_set_wrprotect(src, addr, src_pte);
@ -3317,7 +3334,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
mmu_notifier_invalidate_range_start(mm, mmun_start, mmun_end);
address = start;
for (; address < end; address += sz) {
ptep = huge_pte_offset(mm, address);
ptep = huge_pte_offset(mm, address, sz);
if (!ptep)
continue;
@ -3338,7 +3355,7 @@ void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
* unmapped and its refcount is dropped, so just clear pte here.
*/
if (unlikely(!pte_present(pte))) {
huge_pte_clear(mm, address, ptep);
huge_pte_clear(mm, address, ptep, sz);
spin_unlock(ptl);
continue;
}
@ -3535,7 +3552,8 @@ retry_avoidcopy:
unmap_ref_private(mm, vma, old_page, address);
BUG_ON(huge_pte_none(pte));
spin_lock(ptl);
ptep = huge_pte_offset(mm, address & huge_page_mask(h));
ptep = huge_pte_offset(mm, address & huge_page_mask(h),
huge_page_size(h));
if (likely(ptep &&
pte_same(huge_ptep_get(ptep), pte)))
goto retry_avoidcopy;
@ -3574,7 +3592,8 @@ retry_avoidcopy:
* before the page tables are altered
*/
spin_lock(ptl);
ptep = huge_pte_offset(mm, address & huge_page_mask(h));
ptep = huge_pte_offset(mm, address & huge_page_mask(h),
huge_page_size(h));
if (likely(ptep && pte_same(huge_ptep_get(ptep), pte))) {
ClearPagePrivate(new_page);
@ -3861,7 +3880,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
address &= huge_page_mask(h);
ptep = huge_pte_offset(mm, address);
ptep = huge_pte_offset(mm, address, huge_page_size(h));
if (ptep) {
entry = huge_ptep_get(ptep);
if (unlikely(is_hugetlb_entry_migration(entry))) {
@ -4118,7 +4137,8 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma,
*
* Note that page table lock is not held when pte is null.
*/
pte = huge_pte_offset(mm, vaddr & huge_page_mask(h));
pte = huge_pte_offset(mm, vaddr & huge_page_mask(h),
huge_page_size(h));
if (pte)
ptl = huge_pte_lock(h, mm, pte);
absent = !pte || huge_pte_none(huge_ptep_get(pte));
@ -4257,7 +4277,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
i_mmap_lock_write(vma->vm_file->f_mapping);
for (; address < end; address += huge_page_size(h)) {
spinlock_t *ptl;
ptep = huge_pte_offset(mm, address);
ptep = huge_pte_offset(mm, address, huge_page_size(h));
if (!ptep)
continue;
ptl = huge_pte_lock(h, mm, ptep);
@ -4279,7 +4299,8 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
make_migration_entry_read(&entry);
newpte = swp_entry_to_pte(entry);
set_huge_pte_at(mm, address, ptep, newpte);
set_huge_swap_pte_at(mm, address, ptep,
newpte, huge_page_size(h));
pages++;
}
spin_unlock(ptl);
@ -4521,7 +4542,8 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
saddr = page_table_shareable(svma, vma, addr, idx);
if (saddr) {
spte = huge_pte_offset(svma->vm_mm, saddr);
spte = huge_pte_offset(svma->vm_mm, saddr,
vma_mmu_pagesize(svma));
if (spte) {
get_page(virt_to_page(spte));
break;
@ -4617,7 +4639,8 @@ pte_t *huge_pte_alloc(struct mm_struct *mm,
return pte;
}
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
pte_t *huge_pte_offset(struct mm_struct *mm,
unsigned long addr, unsigned long sz)
{
pgd_t *pgd;
p4d_t *p4d;
@ -4652,6 +4675,14 @@ follow_huge_addr(struct mm_struct *mm, unsigned long address,
return ERR_PTR(-EINVAL);
}
struct page * __weak
follow_huge_pd(struct vm_area_struct *vma,
unsigned long address, hugepd_t hpd, int flags, int pdshift)
{
WARN(1, "hugepd follow called with no support for hugepage directory format\n");
return NULL;
}
struct page * __weak
follow_huge_pmd(struct mm_struct *mm, unsigned long address,
pmd_t *pmd, int flags)
@ -4699,6 +4730,15 @@ follow_huge_pud(struct mm_struct *mm, unsigned long address,
return pte_page(*(pte_t *)pud) + ((address & ~PUD_MASK) >> PAGE_SHIFT);
}
struct page * __weak
follow_huge_pgd(struct mm_struct *mm, unsigned long address, pgd_t *pgd, int flags)
{
if (flags & FOLL_GET)
return NULL;
return pte_page(*(pte_t *)pgd) + ((address & ~PGDIR_MASK) >> PAGE_SHIFT);
}
#ifdef CONFIG_MEMORY_FAILURE
/*

136
mm/kmemleak.c
View File

@ -150,7 +150,7 @@ struct kmemleak_scan_area {
*/
struct kmemleak_object {
spinlock_t lock;
unsigned long flags; /* object status flags */
unsigned int flags; /* object status flags */
struct list_head object_list;
struct list_head gray_list;
struct rb_node rb_node;
@ -159,6 +159,8 @@ struct kmemleak_object {
atomic_t use_count;
unsigned long pointer;
size_t size;
/* pass surplus references to this pointer */
unsigned long excess_ref;
/* minimum number of a pointers found before it is considered leak */
int min_count;
/* the total number of pointers found pointing to this object */
@ -253,7 +255,8 @@ enum {
KMEMLEAK_NOT_LEAK,
KMEMLEAK_IGNORE,
KMEMLEAK_SCAN_AREA,
KMEMLEAK_NO_SCAN
KMEMLEAK_NO_SCAN,
KMEMLEAK_SET_EXCESS_REF
};
/*
@ -262,9 +265,12 @@ enum {
*/
struct early_log {
int op_type; /* kmemleak operation type */
const void *ptr; /* allocated/freed memory block */
size_t size; /* memory block size */
int min_count; /* minimum reference count */
const void *ptr; /* allocated/freed memory block */
union {
size_t size; /* memory block size */
unsigned long excess_ref; /* surplus reference passing */
};
unsigned long trace[MAX_TRACE]; /* stack trace */
unsigned int trace_len; /* stack trace length */
};
@ -393,7 +399,7 @@ static void dump_object_info(struct kmemleak_object *object)
object->comm, object->pid, object->jiffies);
pr_notice(" min_count = %d\n", object->min_count);
pr_notice(" count = %d\n", object->count);
pr_notice(" flags = 0x%lx\n", object->flags);
pr_notice(" flags = 0x%x\n", object->flags);
pr_notice(" checksum = %u\n", object->checksum);
pr_notice(" backtrace:\n");
print_stack_trace(&trace, 4);
@ -562,6 +568,7 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size,
object->flags = OBJECT_ALLOCATED;
object->pointer = ptr;
object->size = size;
object->excess_ref = 0;
object->min_count = min_count;
object->count = 0; /* white color initially */
object->jiffies = jiffies;
@ -794,6 +801,30 @@ out:
put_object(object);
}
/*
* Any surplus references (object already gray) to 'ptr' are passed to
* 'excess_ref'. This is used in the vmalloc() case where a pointer to
* vm_struct may be used as an alternative reference to the vmalloc'ed object
* (see free_thread_stack()).
*/
static void object_set_excess_ref(unsigned long ptr, unsigned long excess_ref)
{
unsigned long flags;
struct kmemleak_object *object;
object = find_and_get_object(ptr, 0);
if (!object) {
kmemleak_warn("Setting excess_ref on unknown object at 0x%08lx\n",
ptr);
return;
}
spin_lock_irqsave(&object->lock, flags);
object->excess_ref = excess_ref;
spin_unlock_irqrestore(&object->lock, flags);
put_object(object);
}
/*
* Set the OBJECT_NO_SCAN flag for the object corresponding to the give
* pointer. Such object will not be scanned by kmemleak but references to it
@ -908,7 +939,7 @@ static void early_alloc_percpu(struct early_log *log)
* @gfp: kmalloc() flags used for kmemleak internal memory allocations
*
* This function is called from the kernel allocators when a new object
* (memory block) is allocated (kmem_cache_alloc, kmalloc, vmalloc etc.).
* (memory block) is allocated (kmem_cache_alloc, kmalloc etc.).
*/
void __ref kmemleak_alloc(const void *ptr, size_t size, int min_count,
gfp_t gfp)
@ -951,6 +982,36 @@ void __ref kmemleak_alloc_percpu(const void __percpu *ptr, size_t size,
}
EXPORT_SYMBOL_GPL(kmemleak_alloc_percpu);
/**
* kmemleak_vmalloc - register a newly vmalloc'ed object
* @area: pointer to vm_struct
* @size: size of the object
* @gfp: __vmalloc() flags used for kmemleak internal memory allocations
*
* This function is called from the vmalloc() kernel allocator when a new
* object (memory block) is allocated.
*/
void __ref kmemleak_vmalloc(const struct vm_struct *area, size_t size, gfp_t gfp)
{
pr_debug("%s(0x%p, %zu)\n", __func__, area, size);
/*
* A min_count = 2 is needed because vm_struct contains a reference to
* the virtual address of the vmalloc'ed block.
*/
if (kmemleak_enabled) {
create_object((unsigned long)area->addr, size, 2, gfp);
object_set_excess_ref((unsigned long)area,
(unsigned long)area->addr);
} else if (kmemleak_early_log) {
log_early(KMEMLEAK_ALLOC, area->addr, size, 2);
/* reusing early_log.size for storing area->addr */
log_early(KMEMLEAK_SET_EXCESS_REF,
area, (unsigned long)area->addr, 0);
}
}
EXPORT_SYMBOL_GPL(kmemleak_vmalloc);
/**
* kmemleak_free - unregister a previously registered object
* @ptr: pointer to beginning of the object
@ -1187,6 +1248,30 @@ static bool update_checksum(struct kmemleak_object *object)
return object->checksum != old_csum;
}
/*
* Update an object's references. object->lock must be held by the caller.
*/
static void update_refs(struct kmemleak_object *object)
{
if (!color_white(object)) {
/* non-orphan, ignored or new */
return;
}
/*
* Increase the object's reference count (number of pointers to the
* memory block). If this count reaches the required minimum, the
* object's color will become gray and it will be added to the
* gray_list.
*/
object->count++;
if (color_gray(object)) {
/* put_object() called when removing from gray_list */
WARN_ON(!get_object(object));
list_add_tail(&object->gray_list, &gray_list);
}
}
/*
* Memory scanning is a long process and it needs to be interruptable. This
* function checks whether such interrupt condition occurred.
@ -1224,6 +1309,7 @@ static void scan_block(void *_start, void *_end,
for (ptr = start; ptr < end; ptr++) {
struct kmemleak_object *object;
unsigned long pointer;
unsigned long excess_ref;
if (scan_should_stop())
break;
@ -1259,25 +1345,27 @@ static void scan_block(void *_start, void *_end,
* enclosed by scan_mutex.
*/
spin_lock_nested(&object->lock, SINGLE_DEPTH_NESTING);
if (!color_white(object)) {
/* non-orphan, ignored or new */
spin_unlock(&object->lock);
continue;
}
/*
* Increase the object's reference count (number of pointers
* to the memory block). If this count reaches the required
* minimum, the object's color will become gray and it will be
* added to the gray_list.
*/
object->count++;
/* only pass surplus references (object already gray) */
if (color_gray(object)) {
/* put_object() called when removing from gray_list */
WARN_ON(!get_object(object));
list_add_tail(&object->gray_list, &gray_list);
excess_ref = object->excess_ref;
/* no need for update_refs() if object already gray */
} else {
excess_ref = 0;
update_refs(object);
}
spin_unlock(&object->lock);
if (excess_ref) {
object = lookup_object(excess_ref, 0);
if (!object)
continue;
if (object == scanned)
/* circular reference, ignore */
continue;
spin_lock_nested(&object->lock, SINGLE_DEPTH_NESTING);
update_refs(object);
spin_unlock(&object->lock);
}
}
read_unlock_irqrestore(&kmemleak_lock, flags);
}
@ -1980,6 +2068,10 @@ void __init kmemleak_init(void)
case KMEMLEAK_NO_SCAN:
kmemleak_no_scan(log->ptr);
break;
case KMEMLEAK_SET_EXCESS_REF:
object_set_excess_ref((unsigned long)log->ptr,
log->excess_ref);
break;
default:
kmemleak_warn("Unknown early log operation: %d\n",
log->op_type);

820
mm/ksm.c
View File

File diff suppressed because it is too large Load Diff

3
mm/memblock.c
View File

@ -54,9 +54,6 @@ struct memblock memblock __initdata_memblock = {
};
int memblock_debug __initdata_memblock;
#ifdef CONFIG_MOVABLE_NODE
bool movable_node_enabled __initdata_memblock = false;
#endif
static bool system_has_some_mirror __initdata_memblock = false;
static int memblock_can_resize __initdata_memblock;
static int memblock_memory_in_slab __initdata_memblock = 0;

81
mm/memcontrol.c
View File

@ -2376,10 +2376,9 @@ void mem_cgroup_split_huge_fixup(struct page *head)
#ifdef CONFIG_MEMCG_SWAP
static void mem_cgroup_swap_statistics(struct mem_cgroup *memcg,
bool charge)
int nr_entries)
{
int val = (charge) ? 1 : -1;
this_cpu_add(memcg->stat->count[MEMCG_SWAP], val);
this_cpu_add(memcg->stat->count[MEMCG_SWAP], nr_entries);
}
/**
@ -2405,8 +2404,8 @@ static int mem_cgroup_move_swap_account(swp_entry_t entry,
new_id = mem_cgroup_id(to);
if (swap_cgroup_cmpxchg(entry, old_id, new_id) == old_id) {
mem_cgroup_swap_statistics(from, false);
mem_cgroup_swap_statistics(to, true);
mem_cgroup_swap_statistics(from, -1);
mem_cgroup_swap_statistics(to, 1);
return 0;
}
return -EINVAL;
@ -3574,6 +3573,7 @@ static int mem_cgroup_oom_control_read(struct seq_file *sf, void *v)
seq_printf(sf, "oom_kill_disable %d\n", memcg->oom_kill_disable);
seq_printf(sf, "under_oom %d\n", (bool)memcg->under_oom);
seq_printf(sf, "oom_kill %lu\n", memcg_sum_events(memcg, OOM_KILL));
return 0;
}
@ -4122,6 +4122,12 @@ static int alloc_mem_cgroup_per_node_info(struct mem_cgroup *memcg, int node)
if (!pn)
return 1;
pn->lruvec_stat = alloc_percpu(struct lruvec_stat);
if (!pn->lruvec_stat) {
kfree(pn);
return 1;
}
lruvec_init(&pn->lruvec);
pn->usage_in_excess = 0;
pn->on_tree = false;
@ -4133,7 +4139,10 @@ static int alloc_mem_cgroup_per_node_info(struct mem_cgroup *memcg, int node)
static void free_mem_cgroup_per_node_info(struct mem_cgroup *memcg, int node)
{
kfree(memcg->nodeinfo[node]);
struct mem_cgroup_per_node *pn = memcg->nodeinfo[node];
free_percpu(pn->lruvec_stat);
kfree(pn);
}
static void __mem_cgroup_free(struct mem_cgroup *memcg)
@ -5165,6 +5174,7 @@ static int memory_events_show(struct seq_file *m, void *v)
seq_printf(m, "high %lu\n", memcg_sum_events(memcg, MEMCG_HIGH));
seq_printf(m, "max %lu\n", memcg_sum_events(memcg, MEMCG_MAX));
seq_printf(m, "oom %lu\n", memcg_sum_events(memcg, MEMCG_OOM));
seq_printf(m, "oom_kill %lu\n", memcg_sum_events(memcg, OOM_KILL));
return 0;
}
@ -5197,8 +5207,8 @@ static int memory_stat_show(struct seq_file *m, void *v)
seq_printf(m, "kernel_stack %llu\n",
(u64)stat[MEMCG_KERNEL_STACK_KB] * 1024);
seq_printf(m, "slab %llu\n",
(u64)(stat[MEMCG_SLAB_RECLAIMABLE] +
stat[MEMCG_SLAB_UNRECLAIMABLE]) * PAGE_SIZE);
(u64)(stat[NR_SLAB_RECLAIMABLE] +
stat[NR_SLAB_UNRECLAIMABLE]) * PAGE_SIZE);
seq_printf(m, "sock %llu\n",
(u64)stat[MEMCG_SOCK] * PAGE_SIZE);
@ -5222,15 +5232,25 @@ static int memory_stat_show(struct seq_file *m, void *v)
}
seq_printf(m, "slab_reclaimable %llu\n",
(u64)stat[MEMCG_SLAB_RECLAIMABLE] * PAGE_SIZE);
(u64)stat[NR_SLAB_RECLAIMABLE] * PAGE_SIZE);
seq_printf(m, "slab_unreclaimable %llu\n",
(u64)stat[MEMCG_SLAB_UNRECLAIMABLE] * PAGE_SIZE);
(u64)stat[NR_SLAB_UNRECLAIMABLE] * PAGE_SIZE);
/* Accumulated memory events */
seq_printf(m, "pgfault %lu\n", events[PGFAULT]);
seq_printf(m, "pgmajfault %lu\n", events[PGMAJFAULT]);
seq_printf(m, "pgrefill %lu\n", events[PGREFILL]);
seq_printf(m, "pgscan %lu\n", events[PGSCAN_KSWAPD] +
events[PGSCAN_DIRECT]);
seq_printf(m, "pgsteal %lu\n", events[PGSTEAL_KSWAPD] +
events[PGSTEAL_DIRECT]);
seq_printf(m, "pgactivate %lu\n", events[PGACTIVATE]);
seq_printf(m, "pgdeactivate %lu\n", events[PGDEACTIVATE]);
seq_printf(m, "pglazyfree %lu\n", events[PGLAZYFREE]);
seq_printf(m, "pglazyfreed %lu\n", events[PGLAZYFREED]);
seq_printf(m, "workingset_refault %lu\n",
stat[WORKINGSET_REFAULT]);
seq_printf(m, "workingset_activate %lu\n",
@ -5445,7 +5465,7 @@ void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
* let's not wait for it. The page already received a
* memory+swap charge, drop the swap entry duplicate.
*/
mem_cgroup_uncharge_swap(entry);
mem_cgroup_uncharge_swap(entry, nr_pages);
}
}
@ -5873,9 +5893,9 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
* ancestor for the swap instead and transfer the memory+swap charge.
*/
swap_memcg = mem_cgroup_id_get_online(memcg);
oldid = swap_cgroup_record(entry, mem_cgroup_id(swap_memcg));
oldid = swap_cgroup_record(entry, mem_cgroup_id(swap_memcg), 1);
VM_BUG_ON_PAGE(oldid, page);
mem_cgroup_swap_statistics(swap_memcg, true);
mem_cgroup_swap_statistics(swap_memcg, 1);
page->mem_cgroup = NULL;
@ -5902,19 +5922,20 @@ void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
css_put(&memcg->css);
}
/*
* mem_cgroup_try_charge_swap - try charging a swap entry
/**
* mem_cgroup_try_charge_swap - try charging swap space for a page
* @page: page being added to swap
* @entry: swap entry to charge
*
* Try to charge @entry to the memcg that @page belongs to.
* Try to charge @page's memcg for the swap space at @entry.
*
* Returns 0 on success, -ENOMEM on failure.
*/
int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry)
{
struct mem_cgroup *memcg;
unsigned int nr_pages = hpage_nr_pages(page);
struct page_counter *counter;
struct mem_cgroup *memcg;
unsigned short oldid;
if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) || !do_swap_account)
@ -5929,25 +5950,27 @@ int mem_cgroup_try_charge_swap(struct page *page, swp_entry_t entry)
memcg = mem_cgroup_id_get_online(memcg);
if (!mem_cgroup_is_root(memcg) &&
!page_counter_try_charge(&memcg->swap, 1, &counter)) {
!page_counter_try_charge(&memcg->swap, nr_pages, &counter)) {
mem_cgroup_id_put(memcg);
return -ENOMEM;
}
oldid = swap_cgroup_record(entry, mem_cgroup_id(memcg));
/* Get references for the tail pages, too */
if (nr_pages > 1)
mem_cgroup_id_get_many(memcg, nr_pages - 1);
oldid = swap_cgroup_record(entry, mem_cgroup_id(memcg), nr_pages);
VM_BUG_ON_PAGE(oldid, page);
mem_cgroup_swap_statistics(memcg, true);
mem_cgroup_swap_statistics(memcg, nr_pages);
return 0;
}
/**
* mem_cgroup_uncharge_swap - uncharge a swap entry
* mem_cgroup_uncharge_swap - uncharge swap space
* @entry: swap entry to uncharge
*
* Drop the swap charge associated with @entry.
* @nr_pages: the amount of swap space to uncharge
*/
void mem_cgroup_uncharge_swap(swp_entry_t entry)
void mem_cgroup_uncharge_swap(swp_entry_t entry, unsigned int nr_pages)
{
struct mem_cgroup *memcg;
unsigned short id;
@ -5955,18 +5978,18 @@ void mem_cgroup_uncharge_swap(swp_entry_t entry)
if (!do_swap_account)
return;
id = swap_cgroup_record(entry, 0);
id = swap_cgroup_record(entry, 0, nr_pages);
rcu_read_lock();
memcg = mem_cgroup_from_id(id);
if (memcg) {
if (!mem_cgroup_is_root(memcg)) {
if (cgroup_subsys_on_dfl(memory_cgrp_subsys))
page_counter_uncharge(&memcg->swap, 1);
page_counter_uncharge(&memcg->swap, nr_pages);
else
page_counter_uncharge(&memcg->memsw, 1);
page_counter_uncharge(&memcg->memsw, nr_pages);
}
mem_cgroup_swap_statistics(memcg, false);
mem_cgroup_id_put(memcg);
mem_cgroup_swap_statistics(memcg, -nr_pages);
mem_cgroup_id_put_many(memcg, nr_pages);
}
rcu_read_unlock();
}

13
mm/memory-failure.c
View File

@ -1492,11 +1492,16 @@ EXPORT_SYMBOL(unpoison_memory);
static struct page *new_page(struct page *p, unsigned long private, int **x)
{
int nid = page_to_nid(p);
if (PageHuge(p))
return alloc_huge_page_node(page_hstate(compound_head(p)),
nid);
else
if (PageHuge(p)) {
struct hstate *hstate = page_hstate(compound_head(p));
if (hstate_is_gigantic(hstate))
return alloc_huge_page_node(hstate, NUMA_NO_NODE);
return alloc_huge_page_node(hstate, nid);
} else {
return __alloc_pages_node(nid, GFP_HIGHUSER_MOVABLE, 0);
}
}
/*

6
mm/memory.c
View File

@ -2719,7 +2719,7 @@ int do_swap_page(struct vm_fault *vmf)
/* Had to read the page from swap area: Major fault */
ret = VM_FAULT_MAJOR;
count_vm_event(PGMAJFAULT);
mem_cgroup_count_vm_event(vma->vm_mm, PGMAJFAULT);
count_memcg_event_mm(vma->vm_mm, PGMAJFAULT);
} else if (PageHWPoison(page)) {
/*
* hwpoisoned dirty swapcache pages are kept for killing
@ -3837,7 +3837,7 @@ int handle_mm_fault(struct vm_area_struct *vma, unsigned long address,
__set_current_state(TASK_RUNNING);
count_vm_event(PGFAULT);
mem_cgroup_count_vm_event(vma->vm_mm, PGFAULT);
count_memcg_event_mm(vma->vm_mm, PGFAULT);
/* do counter updates before entering really critical section. */
check_sync_rss_stat(current);
@ -4014,8 +4014,6 @@ static int __follow_pte_pmd(struct mm_struct *mm, unsigned long address,
goto out;
ptep = pte_offset_map_lock(mm, pmd, address, ptlp);
if (!ptep)
goto out;
if (!pte_present(*ptep))
goto unlock;
*ptepp = ptep;

539
mm/memory_hotplug.c
View File

@ -79,6 +79,8 @@ static struct {
#define memhp_lock_acquire() lock_map_acquire(&mem_hotplug.dep_map)
#define memhp_lock_release() lock_map_release(&mem_hotplug.dep_map)
bool movable_node_enabled = false;
#ifndef CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE
bool memhp_auto_online;
#else
@ -300,229 +302,38 @@ void __init register_page_bootmem_info_node(struct pglist_data *pgdat)
}
#endif /* CONFIG_HAVE_BOOTMEM_INFO_NODE */
static void __meminit grow_zone_span(struct zone *zone, unsigned long start_pfn,
unsigned long end_pfn)
{
unsigned long old_zone_end_pfn;
zone_span_writelock(zone);
old_zone_end_pfn = zone_end_pfn(zone);
if (zone_is_empty(zone) || start_pfn < zone->zone_start_pfn)
zone->zone_start_pfn = start_pfn;
zone->spanned_pages = max(old_zone_end_pfn, end_pfn) -
zone->zone_start_pfn;
zone_span_writeunlock(zone);
}
static void resize_zone(struct zone *zone, unsigned long start_pfn,
unsigned long end_pfn)
{
zone_span_writelock(zone);
if (end_pfn - start_pfn) {
zone->zone_start_pfn = start_pfn;
zone->spanned_pages = end_pfn - start_pfn;
} else {
/*
* make it consist as free_area_init_core(),
* if spanned_pages = 0, then keep start_pfn = 0
*/
zone->zone_start_pfn = 0;
zone->spanned_pages = 0;
}
zone_span_writeunlock(zone);
}
static void fix_zone_id(struct zone *zone, unsigned long start_pfn,
unsigned long end_pfn)
{
enum zone_type zid = zone_idx(zone);
int nid = zone->zone_pgdat->node_id;
unsigned long pfn;
for (pfn = start_pfn; pfn < end_pfn; pfn++)
set_page_links(pfn_to_page(pfn), zid, nid, pfn);
}
/* Can fail with -ENOMEM from allocating a wait table with vmalloc() or
* alloc_bootmem_node_nopanic()/memblock_virt_alloc_node_nopanic() */
static int __ref ensure_zone_is_initialized(struct zone *zone,
unsigned long start_pfn, unsigned long num_pages)
{
if (!zone_is_initialized(zone))
return init_currently_empty_zone(zone, start_pfn, num_pages);
return 0;
}
static int __meminit move_pfn_range_left(struct zone *z1, struct zone *z2,
unsigned long start_pfn, unsigned long end_pfn)
{
int ret;
unsigned long flags;
unsigned long z1_start_pfn;
ret = ensure_zone_is_initialized(z1, start_pfn, end_pfn - start_pfn);
if (ret)
return ret;
pgdat_resize_lock(z1->zone_pgdat, &flags);
/* can't move pfns which are higher than @z2 */
if (end_pfn > zone_end_pfn(z2))
goto out_fail;
/* the move out part must be at the left most of @z2 */
if (start_pfn > z2->zone_start_pfn)
goto out_fail;
/* must included/overlap */
if (end_pfn <= z2->zone_start_pfn)
goto out_fail;
/* use start_pfn for z1's start_pfn if z1 is empty */
if (!zone_is_empty(z1))
z1_start_pfn = z1->zone_start_pfn;
else
z1_start_pfn = start_pfn;
resize_zone(z1, z1_start_pfn, end_pfn);
resize_zone(z2, end_pfn, zone_end_pfn(z2));
pgdat_resize_unlock(z1->zone_pgdat, &flags);
fix_zone_id(z1, start_pfn, end_pfn);
return 0;
out_fail:
pgdat_resize_unlock(z1->zone_pgdat, &flags);
return -1;
}
static int __meminit move_pfn_range_right(struct zone *z1, struct zone *z2,
unsigned long start_pfn, unsigned long end_pfn)
{
int ret;
unsigned long flags;
unsigned long z2_end_pfn;
ret = ensure_zone_is_initialized(z2, start_pfn, end_pfn - start_pfn);
if (ret)
return ret;
pgdat_resize_lock(z1->zone_pgdat, &flags);
/* can't move pfns which are lower than @z1 */
if (z1->zone_start_pfn > start_pfn)
goto out_fail;
/* the move out part mast at the right most of @z1 */
if (zone_end_pfn(z1) > end_pfn)
goto out_fail;
/* must included/overlap */
if (start_pfn >= zone_end_pfn(z1))
goto out_fail;
/* use end_pfn for z2's end_pfn if z2 is empty */
if (!zone_is_empty(z2))
z2_end_pfn = zone_end_pfn(z2);
else
z2_end_pfn = end_pfn;
resize_zone(z1, z1->zone_start_pfn, start_pfn);
resize_zone(z2, start_pfn, z2_end_pfn);
pgdat_resize_unlock(z1->zone_pgdat, &flags);
fix_zone_id(z2, start_pfn, end_pfn);
return 0;
out_fail:
pgdat_resize_unlock(z1->zone_pgdat, &flags);
return -1;
}
static struct zone * __meminit move_pfn_range(int zone_shift,
unsigned long start_pfn, unsigned long end_pfn)
{
struct zone *zone = page_zone(pfn_to_page(start_pfn));
int ret = 0;
if (zone_shift < 0)
ret = move_pfn_range_left(zone + zone_shift, zone,
start_pfn, end_pfn);
else if (zone_shift)
ret = move_pfn_range_right(zone, zone + zone_shift,
start_pfn, end_pfn);
if (ret)
return NULL;
return zone + zone_shift;
}
static void __meminit grow_pgdat_span(struct pglist_data *pgdat, unsigned long start_pfn,
unsigned long end_pfn)
{
unsigned long old_pgdat_end_pfn = pgdat_end_pfn(pgdat);
if (!pgdat->node_spanned_pages || start_pfn < pgdat->node_start_pfn)
pgdat->node_start_pfn = start_pfn;
pgdat->node_spanned_pages = max(old_pgdat_end_pfn, end_pfn) -
pgdat->node_start_pfn;
}
static int __meminit __add_zone(struct zone *zone, unsigned long phys_start_pfn)
{
struct pglist_data *pgdat = zone->zone_pgdat;
int nr_pages = PAGES_PER_SECTION;
int nid = pgdat->node_id;
int zone_type;
unsigned long flags, pfn;
int ret;
zone_type = zone - pgdat->node_zones;
ret = ensure_zone_is_initialized(zone, phys_start_pfn, nr_pages);
if (ret)
return ret;
pgdat_resize_lock(zone->zone_pgdat, &flags);
grow_zone_span(zone, phys_start_pfn, phys_start_pfn + nr_pages);
grow_pgdat_span(zone->zone_pgdat, phys_start_pfn,
phys_start_pfn + nr_pages);
pgdat_resize_unlock(zone->zone_pgdat, &flags);
memmap_init_zone(nr_pages, nid, zone_type,
phys_start_pfn, MEMMAP_HOTPLUG);
/* online_page_range is called later and expects pages reserved */
for (pfn = phys_start_pfn; pfn < phys_start_pfn + nr_pages; pfn++) {
if (!pfn_valid(pfn))
continue;
SetPageReserved(pfn_to_page(pfn));
}
return 0;
}
static int __meminit __add_section(int nid, struct zone *zone,
unsigned long phys_start_pfn)
static int __meminit __add_section(int nid, unsigned long phys_start_pfn,
bool want_memblock)
{
int ret;
int i;
if (pfn_valid(phys_start_pfn))
return -EEXIST;
ret = sparse_add_one_section(zone, phys_start_pfn);
ret = sparse_add_one_section(NODE_DATA(nid), phys_start_pfn);
if (ret < 0)
return ret;
ret = __add_zone(zone, phys_start_pfn);
/*
* Make all the pages reserved so that nobody will stumble over half
* initialized state.
* FIXME: We also have to associate it with a node because pfn_to_node
* relies on having page with the proper node.
*/
for (i = 0; i < PAGES_PER_SECTION; i++) {
unsigned long pfn = phys_start_pfn + i;
struct page *page;
if (!pfn_valid(pfn))
continue;
if (ret < 0)
return ret;
page = pfn_to_page(pfn);
set_page_node(page, nid);
SetPageReserved(page);
}
if (!want_memblock)
return 0;
return register_new_memory(nid, __pfn_to_section(phys_start_pfn));
}
@ -533,16 +344,14 @@ static int __meminit __add_section(int nid, struct zone *zone,
* call this function after deciding the zone to which to
* add the new pages.
*/
int __ref __add_pages(int nid, struct zone *zone, unsigned long phys_start_pfn,
unsigned long nr_pages)
int __ref __add_pages(int nid, unsigned long phys_start_pfn,
unsigned long nr_pages, bool want_memblock)
{
unsigned long i;
int err = 0;
int start_sec, end_sec;
struct vmem_altmap *altmap;
clear_zone_contiguous(zone);
/* during initialize mem_map, align hot-added range to section */
start_sec = pfn_to_section_nr(phys_start_pfn);
end_sec = pfn_to_section_nr(phys_start_pfn + nr_pages - 1);
@ -562,7 +371,7 @@ int __ref __add_pages(int nid, struct zone *zone, unsigned long phys_start_pfn,
}
for (i = start_sec; i <= end_sec; i++) {
err = __add_section(nid, zone, section_nr_to_pfn(i));
err = __add_section(nid, section_nr_to_pfn(i), want_memblock);
/*
* EEXIST is finally dealt with by ioresource collision
@ -575,7 +384,6 @@ int __ref __add_pages(int nid, struct zone *zone, unsigned long phys_start_pfn,
}
vmemmap_populate_print_last();
out:
set_zone_contiguous(zone);
return err;
}
EXPORT_SYMBOL_GPL(__add_pages);
@ -939,33 +747,20 @@ static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages,
unsigned long i;
unsigned long onlined_pages = *(unsigned long *)arg;
struct page *page;
if (PageReserved(pfn_to_page(start_pfn)))
for (i = 0; i < nr_pages; i++) {
page = pfn_to_page(start_pfn + i);
(*online_page_callback)(page);
onlined_pages++;
}
online_mem_sections(start_pfn, start_pfn + nr_pages);
*(unsigned long *)arg = onlined_pages;
return 0;
}
#ifdef CONFIG_MOVABLE_NODE
/*
* When CONFIG_MOVABLE_NODE, we permit onlining of a node which doesn't have
* normal memory.
*/
static bool can_online_high_movable(struct zone *zone)
{
return true;
}
#else /* CONFIG_MOVABLE_NODE */
/* ensure every online node has NORMAL memory */
static bool can_online_high_movable(struct zone *zone)
{
return node_state(zone_to_nid(zone), N_NORMAL_MEMORY);
}
#endif /* CONFIG_MOVABLE_NODE */
/* check which state of node_states will be changed when online memory */
static void node_states_check_changes_online(unsigned long nr_pages,
struct zone *zone, struct memory_notify *arg)
@ -1040,39 +835,131 @@ static void node_states_set_node(int node, struct memory_notify *arg)
node_set_state(node, N_MEMORY);
}
bool zone_can_shift(unsigned long pfn, unsigned long nr_pages,
enum zone_type target, int *zone_shift)
bool allow_online_pfn_range(int nid, unsigned long pfn, unsigned long nr_pages, int online_type)
{
struct zone *zone = page_zone(pfn_to_page(pfn));
enum zone_type idx = zone_idx(zone);
int i;
struct pglist_data *pgdat = NODE_DATA(nid);
struct zone *movable_zone = &pgdat->node_zones[ZONE_MOVABLE];
struct zone *default_zone = default_zone_for_pfn(nid, pfn, nr_pages);
*zone_shift = 0;
if (idx < target) {
/* pages must be at end of current zone */
if (pfn + nr_pages != zone_end_pfn(zone))
return false;
/* no zones in use between current zone and target */
for (i = idx + 1; i < target; i++)
if (zone_is_initialized(zone - idx + i))
return false;
/*
* TODO there shouldn't be any inherent reason to have ZONE_NORMAL
* physically before ZONE_MOVABLE. All we need is they do not
* overlap. Historically we didn't allow ZONE_NORMAL after ZONE_MOVABLE
* though so let's stick with it for simplicity for now.
* TODO make sure we do not overlap with ZONE_DEVICE
*/
if (online_type == MMOP_ONLINE_KERNEL) {
if (zone_is_empty(movable_zone))
return true;
return movable_zone->zone_start_pfn >= pfn + nr_pages;
} else if (online_type == MMOP_ONLINE_MOVABLE) {
return zone_end_pfn(default_zone) <= pfn;
}
if (target < idx) {
/* pages must be at beginning of current zone */
if (pfn != zone->zone_start_pfn)
return false;
/* MMOP_ONLINE_KEEP will always succeed and inherits the current zone */
return online_type == MMOP_ONLINE_KEEP;
}
/* no zones in use between current zone and target */
for (i = target + 1; i < idx; i++)
if (zone_is_initialized(zone - idx + i))
return false;
static void __meminit resize_zone_range(struct zone *zone, unsigned long start_pfn,
unsigned long nr_pages)
{
unsigned long old_end_pfn = zone_end_pfn(zone);
if (zone_is_empty(zone) || start_pfn < zone->zone_start_pfn)
zone->zone_start_pfn = start_pfn;
zone->spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - zone->zone_start_pfn;
}
static void __meminit resize_pgdat_range(struct pglist_data *pgdat, unsigned long start_pfn,
unsigned long nr_pages)
{
unsigned long old_end_pfn = pgdat_end_pfn(pgdat);
if (!pgdat->node_spanned_pages || start_pfn < pgdat->node_start_pfn)
pgdat->node_start_pfn = start_pfn;
pgdat->node_spanned_pages = max(start_pfn + nr_pages, old_end_pfn) - pgdat->node_start_pfn;
}
void __ref move_pfn_range_to_zone(struct zone *zone,
unsigned long start_pfn, unsigned long nr_pages)
{
struct pglist_data *pgdat = zone->zone_pgdat;
int nid = pgdat->node_id;
unsigned long flags;
if (zone_is_empty(zone))
init_currently_empty_zone(zone, start_pfn, nr_pages);
clear_zone_contiguous(zone);
/* TODO Huh pgdat is irqsave while zone is not. It used to be like that before */
pgdat_resize_lock(pgdat, &flags);
zone_span_writelock(zone);
resize_zone_range(zone, start_pfn, nr_pages);
zone_span_writeunlock(zone);
resize_pgdat_range(pgdat, start_pfn, nr_pages);
pgdat_resize_unlock(pgdat, &flags);
/*
* TODO now we have a visible range of pages which are not associated
* with their zone properly. Not nice but set_pfnblock_flags_mask
* expects the zone spans the pfn range. All the pages in the range
* are reserved so nobody should be touching them so we should be safe
*/
memmap_init_zone(nr_pages, nid, zone_idx(zone), start_pfn, MEMMAP_HOTPLUG);
set_zone_contiguous(zone);
}
/*
* Returns a default kernel memory zone for the given pfn range.
* If no kernel zone covers this pfn range it will automatically go
* to the ZONE_NORMAL.
*/
struct zone *default_zone_for_pfn(int nid, unsigned long start_pfn,
unsigned long nr_pages)
{
struct pglist_data *pgdat = NODE_DATA(nid);
int zid;
for (zid = 0; zid <= ZONE_NORMAL; zid++) {
struct zone *zone = &pgdat->node_zones[zid];
if (zone_intersects(zone, start_pfn, nr_pages))
return zone;
}
*zone_shift = target - idx;
return true;
return &pgdat->node_zones[ZONE_NORMAL];
}
/*
* Associates the given pfn range with the given node and the zone appropriate
* for the given online type.
*/
static struct zone * __meminit move_pfn_range(int online_type, int nid,
unsigned long start_pfn, unsigned long nr_pages)
{
struct pglist_data *pgdat = NODE_DATA(nid);
struct zone *zone = default_zone_for_pfn(nid, start_pfn, nr_pages);
if (online_type == MMOP_ONLINE_KEEP) {
struct zone *movable_zone = &pgdat->node_zones[ZONE_MOVABLE];
/*
* MMOP_ONLINE_KEEP defaults to MMOP_ONLINE_KERNEL but use
* movable zone if that is not possible (e.g. we are within
* or past the existing movable zone)
*/
if (!allow_online_pfn_range(nid, start_pfn, nr_pages,
MMOP_ONLINE_KERNEL))
zone = movable_zone;
} else if (online_type == MMOP_ONLINE_MOVABLE) {
zone = &pgdat->node_zones[ZONE_MOVABLE];
}
move_pfn_range_to_zone(zone, start_pfn, nr_pages);
return zone;
}
/* Must be protected by mem_hotplug_begin() */
@ -1085,38 +972,18 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
int nid;
int ret;
struct memory_notify arg;
int zone_shift = 0;
/*
* This doesn't need a lock to do pfn_to_page().
* The section can't be removed here because of the
* memory_block->state_mutex.
*/
zone = page_zone(pfn_to_page(pfn));
if ((zone_idx(zone) > ZONE_NORMAL ||
online_type == MMOP_ONLINE_MOVABLE) &&
!can_online_high_movable(zone))
nid = pfn_to_nid(pfn);
if (!allow_online_pfn_range(nid, pfn, nr_pages, online_type))
return -EINVAL;
if (online_type == MMOP_ONLINE_KERNEL) {
if (!zone_can_shift(pfn, nr_pages, ZONE_NORMAL, &zone_shift))
return -EINVAL;
} else if (online_type == MMOP_ONLINE_MOVABLE) {
if (!zone_can_shift(pfn, nr_pages, ZONE_MOVABLE, &zone_shift))
return -EINVAL;
}
zone = move_pfn_range(zone_shift, pfn, pfn + nr_pages);
if (!zone)
return -EINVAL;
/* associate pfn range with the zone */
zone = move_pfn_range(online_type, nid, pfn, nr_pages);
arg.start_pfn = pfn;
arg.nr_pages = nr_pages;
node_states_check_changes_online(nr_pages, zone, &arg);
nid = zone_to_nid(zone);
ret = memory_notify(MEM_GOING_ONLINE, &arg);
ret = notifier_to_errno(ret);
if (ret)
@ -1311,39 +1178,6 @@ static int check_hotplug_memory_range(u64 start, u64 size)
return 0;
}
/*
* If movable zone has already been setup, newly added memory should be check.
* If its address is higher than movable zone, it should be added as movable.
* Without this check, movable zone may overlap with other zone.
*/
static int should_add_memory_movable(int nid, u64 start, u64 size)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
pg_data_t *pgdat = NODE_DATA(nid);
struct zone *movable_zone = pgdat->node_zones + ZONE_MOVABLE;
if (zone_is_empty(movable_zone))
return 0;
if (movable_zone->zone_start_pfn <= start_pfn)
return 1;
return 0;
}
int zone_for_memory(int nid, u64 start, u64 size, int zone_default,
bool for_device)
{
#ifdef CONFIG_ZONE_DEVICE
if (for_device)
return ZONE_DEVICE;
#endif
if (should_add_memory_movable(nid, start, size))
return ZONE_MOVABLE;
return zone_default;
}
static int online_memory_block(struct memory_block *mem, void *arg)
{
return device_online(&mem->dev);
@ -1389,7 +1223,7 @@ int __ref add_memory_resource(int nid, struct resource *res, bool online)
}
/* call arch's memory hotadd */
ret = arch_add_memory(nid, start, size, false);
ret = arch_add_memory(nid, start, size, true);
if (ret < 0)
goto error;
@ -1398,7 +1232,22 @@ int __ref add_memory_resource(int nid, struct resource *res, bool online)
node_set_online(nid);
if (new_node) {
ret = register_one_node(nid);
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
ret = __register_one_node(nid);
if (ret)
goto register_fail;
/*
* link memory sections under this node. This is already
* done when creatig memory section in register_new_memory
* but that depends to have the node registered so offline
* nodes have to go through register_node.
* TODO clean up this mess.
*/
ret = link_mem_sections(nid, start_pfn, nr_pages);
register_fail:
/*
* If sysfs file of new node can't create, cpu on the node
* can't be hot-added. There is no rollback way now.
@ -1592,11 +1441,9 @@ static struct page *new_node_page(struct page *page, unsigned long private,
gfp_mask |= __GFP_HIGHMEM;
if (!nodes_empty(nmask))
new_page = __alloc_pages_nodemask(gfp_mask, 0,
node_zonelist(nid, gfp_mask), &nmask);
new_page = __alloc_pages_nodemask(gfp_mask, 0, nid, &nmask);
if (!new_page)
new_page = __alloc_pages(gfp_mask, 0,
node_zonelist(nid, gfp_mask));
new_page = __alloc_pages(gfp_mask, 0, nid);
return new_page;
}
@ -1725,47 +1572,12 @@ check_pages_isolated(unsigned long start_pfn, unsigned long end_pfn)
return offlined;
}
#ifdef CONFIG_MOVABLE_NODE
/*
* When CONFIG_MOVABLE_NODE, we permit offlining of a node which doesn't have
* normal memory.
*/
static bool can_offline_normal(struct zone *zone, unsigned long nr_pages)
{
return true;
}
#else /* CONFIG_MOVABLE_NODE */
/* ensure the node has NORMAL memory if it is still online */
static bool can_offline_normal(struct zone *zone, unsigned long nr_pages)
{
struct pglist_data *pgdat = zone->zone_pgdat;
unsigned long present_pages = 0;
enum zone_type zt;
for (zt = 0; zt <= ZONE_NORMAL; zt++)
present_pages += pgdat->node_zones[zt].present_pages;
if (present_pages > nr_pages)
return true;
present_pages = 0;
for (; zt <= ZONE_MOVABLE; zt++)
present_pages += pgdat->node_zones[zt].present_pages;
/*
* we can't offline the last normal memory until all
* higher memory is offlined.
*/
return present_pages == 0;
}
#endif /* CONFIG_MOVABLE_NODE */
static int __init cmdline_parse_movable_node(char *p)
{
#ifdef CONFIG_MOVABLE_NODE
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
movable_node_enabled = true;
#else
pr_warn("movable_node option not supported\n");
pr_warn("movable_node parameter depends on CONFIG_HAVE_MEMBLOCK_NODE_MAP to work properly\n");
#endif
return 0;
}
@ -1887,9 +1699,6 @@ static int __ref __offline_pages(unsigned long start_pfn,
node = zone_to_nid(zone);
nr_pages = end_pfn - start_pfn;
if (zone_idx(zone) <= ZONE_NORMAL && !can_offline_normal(zone, nr_pages))
return -EINVAL;
/* set above range as isolated */
ret = start_isolate_page_range(start_pfn, end_pfn,
MIGRATE_MOVABLE, true);

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