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Merge branch 'akpm' (patches from Andrew) 

Merge misc fixes from Andrew Morton:
 "15 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: numa: mark huge PTEs young when clearing NUMA hinting faults
  mm: numa: slow PTE scan rate if migration failures occur
  mm: numa: preserve PTE write permissions across a NUMA hinting fault
  mm: numa: group related processes based on VMA flags instead of page table flags
  hfsplus: fix B-tree corruption after insertion at position 0
  MAINTAINERS: add Jan as DMI/SMBIOS support maintainer
  fs/affs/file.c: unlock/release page on error
  mm/page_alloc.c: call kernel_map_pages in unset_migrateype_isolate
  mm/slub: fix lockups on PREEMPT && !SMP kernels
  mm/memory hotplug: postpone the reset of obsolete pgdat
  MAINTAINERS: correct rtc armada38x pattern entry
  mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers
  mm: fix anon_vma->degree underflow in anon_vma endless growing prevention
  drivers/rtc/rtc-mrst: fix suspend/resume
  aoe: update aoe maintainer information
This commit is contained in:
Linus Torvalds 2015-03-25 16:21:17 -07:00
parent b8517e9830 b7b04004ec
commit 9c8e30d12d
15 changed files with 106 additions and 71 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
MAINTAINERS
View File

@ -1186,7 +1186,7 @@ M: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: arch/arm/mach-mvebu/
F: drivers/rtc/armada38x-rtc
F: drivers/rtc/rtc-armada38x.c
ARM/Marvell Berlin SoC support
M: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
@ -1675,8 +1675,8 @@ F: drivers/misc/eeprom/at24.c
F: include/linux/platform_data/at24.h
ATA OVER ETHERNET (AOE) DRIVER
M: "Ed L. Cashin" <ecashin@coraid.com>
W: http://support.coraid.com/support/linux
M: "Ed L. Cashin" <ed.cashin@acm.org>
W: http://www.openaoe.org/
S: Supported
F: Documentation/aoe/
F: drivers/block/aoe/
@ -3252,6 +3252,13 @@ S: Maintained
F: Documentation/hwmon/dme1737
F: drivers/hwmon/dme1737.c
DMI/SMBIOS SUPPORT
M: Jean Delvare <jdelvare@suse.de>
S: Maintained
F: drivers/firmware/dmi-id.c
F: drivers/firmware/dmi_scan.c
F: include/linux/dmi.h
DOCKING STATION DRIVER
M: Shaohua Li <shaohua.li@intel.com>
L: linux-acpi@vger.kernel.org

17
drivers/rtc/rtc-mrst.c
View File

@ -413,8 +413,8 @@ static void rtc_mrst_do_remove(struct device *dev)
mrst->dev = NULL;
}
#ifdef CONFIG_PM
static int mrst_suspend(struct device *dev, pm_message_t mesg)
#ifdef CONFIG_PM_SLEEP
static int mrst_suspend(struct device *dev)
{
struct mrst_rtc *mrst = dev_get_drvdata(dev);
unsigned char tmp;
@ -453,7 +453,7 @@ static int mrst_suspend(struct device *dev, pm_message_t mesg)
*/
static inline int mrst_poweroff(struct device *dev)
{
return mrst_suspend(dev, PMSG_HIBERNATE);
return mrst_suspend(dev);
}
static int mrst_resume(struct device *dev)
@ -490,9 +490,11 @@ static int mrst_resume(struct device *dev)
return 0;
}
static SIMPLE_DEV_PM_OPS(mrst_pm_ops, mrst_suspend, mrst_resume);
#define MRST_PM_OPS (&mrst_pm_ops)
#else
#define mrst_suspend NULL
#define mrst_resume NULL
#define MRST_PM_OPS NULL
static inline int mrst_poweroff(struct device *dev)
{
@ -529,9 +531,8 @@ static struct platform_driver vrtc_mrst_platform_driver = {
.remove = vrtc_mrst_platform_remove,
.shutdown = vrtc_mrst_platform_shutdown,
.driver = {
.name = (char *) driver_name,
.suspend = mrst_suspend,
.resume = mrst_resume,
.name = driver_name,
.pm = MRST_PM_OPS,
}
};

19
fs/affs/file.c
View File

@ -699,8 +699,10 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
boff = tmp % bsize;
if (boff) {
bh = affs_bread_ino(inode, bidx, 0);
if (IS_ERR(bh))
return PTR_ERR(bh);
if (IS_ERR(bh)) {
written = PTR_ERR(bh);
goto err_first_bh;
}
tmp = min(bsize - boff, to - from);
BUG_ON(boff + tmp > bsize || tmp > bsize);
memcpy(AFFS_DATA(bh) + boff, data + from, tmp);
@ -712,14 +714,16 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
bidx++;
} else if (bidx) {
bh = affs_bread_ino(inode, bidx - 1, 0);
if (IS_ERR(bh))
return PTR_ERR(bh);
if (IS_ERR(bh)) {
written = PTR_ERR(bh);
goto err_first_bh;
}
}
while (from + bsize <= to) {
prev_bh = bh;
bh = affs_getemptyblk_ino(inode, bidx);
if (IS_ERR(bh))
goto out;
goto err_bh;
memcpy(AFFS_DATA(bh), data + from, bsize);
if (buffer_new(bh)) {
AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
@ -751,7 +755,7 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
prev_bh = bh;
bh = affs_bread_ino(inode, bidx, 1);
if (IS_ERR(bh))
goto out;
goto err_bh;
tmp = min(bsize, to - from);
BUG_ON(tmp > bsize);
memcpy(AFFS_DATA(bh), data + from, tmp);
@ -790,12 +794,13 @@ done:
if (tmp > inode->i_size)
inode->i_size = AFFS_I(inode)->mmu_private = tmp;
err_first_bh:
unlock_page(page);
page_cache_release(page);
return written;
out:
err_bh:
bh = prev_bh;
if (!written)
written = PTR_ERR(bh);

20
fs/hfsplus/brec.c
View File

@ -131,13 +131,16 @@ skip:
hfs_bnode_write(node, entry, data_off + key_len, entry_len);
hfs_bnode_dump(node);
if (new_node) {
/* update parent key if we inserted a key
* at the start of the first node
*/
if (!rec && new_node != node)
hfs_brec_update_parent(fd);
/*
* update parent key if we inserted a key
* at the start of the node and it is not the new node
*/
if (!rec && new_node != node) {
hfs_bnode_read_key(node, fd->search_key, data_off + size);
hfs_brec_update_parent(fd);
}
if (new_node) {
hfs_bnode_put(fd->bnode);
if (!new_node->parent) {
hfs_btree_inc_height(tree);
@ -168,9 +171,6 @@ skip:
goto again;
}
if (!rec)
hfs_brec_update_parent(fd);
return 0;
}
@ -370,6 +370,8 @@ again:
if (IS_ERR(parent))
return PTR_ERR(parent);
__hfs_brec_find(parent, fd, hfs_find_rec_by_key);
if (fd->record < 0)
return -ENOENT;
hfs_bnode_dump(parent);
rec = fd->record;

9
include/linux/sched.h
View File

@ -1625,11 +1625,11 @@ struct task_struct {
/*
* numa_faults_locality tracks if faults recorded during the last
* scan window were remote/local. The task scan period is adapted
* based on the locality of the faults with different weights
* depending on whether they were shared or private faults
* scan window were remote/local or failed to migrate. The task scan
* period is adapted based on the locality of the faults with different
* weights depending on whether they were shared or private faults
*/
unsigned long numa_faults_locality[2];
unsigned long numa_faults_locality[3];
unsigned long numa_pages_migrated;
#endif /* CONFIG_NUMA_BALANCING */
@ -1719,6 +1719,7 @@ struct task_struct {
#define TNF_NO_GROUP 0x02
#define TNF_SHARED 0x04
#define TNF_FAULT_LOCAL 0x08
#define TNF_MIGRATE_FAIL 0x10
#ifdef CONFIG_NUMA_BALANCING
extern void task_numa_fault(int last_node, int node, int pages, int flags);

8
kernel/sched/fair.c
View File

@ -1609,9 +1609,11 @@ static void update_task_scan_period(struct task_struct *p,
/*
* If there were no record hinting faults then either the task is
* completely idle or all activity is areas that are not of interest
* to automatic numa balancing. Scan slower
* to automatic numa balancing. Related to that, if there were failed
* migration then it implies we are migrating too quickly or the local
* node is overloaded. In either case, scan slower
*/
if (local + shared == 0) {
if (local + shared == 0 || p->numa_faults_locality[2]) {
p->numa_scan_period = min(p->numa_scan_period_max,
p->numa_scan_period << 1);
@ -2080,6 +2082,8 @@ void task_numa_fault(int last_cpupid, int mem_node, int pages, int flags)
if (migrated)
p->numa_pages_migrated += pages;
if (flags & TNF_MIGRATE_FAIL)
p->numa_faults_locality[2] += pages;
p->numa_faults[task_faults_idx(NUMA_MEMBUF, mem_node, priv)] += pages;
p->numa_faults[task_faults_idx(NUMA_CPUBUF, cpu_node, priv)] += pages;

26
mm/huge_memory.c
View File

@ -1260,6 +1260,7 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
int target_nid, last_cpupid = -1;
bool page_locked;
bool migrated = false;
bool was_writable;
int flags = 0;
/* A PROT_NONE fault should not end up here */
@ -1291,17 +1292,8 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
flags |= TNF_FAULT_LOCAL;
}
/*
* Avoid grouping on DSO/COW pages in specific and RO pages
* in general, RO pages shouldn't hurt as much anyway since
* they can be in shared cache state.
*
* FIXME! This checks "pmd_dirty()" as an approximation of
* "is this a read-only page", since checking "pmd_write()"
* is even more broken. We haven't actually turned this into
* a writable page, so pmd_write() will always be false.
*/
if (!pmd_dirty(pmd))
/* See similar comment in do_numa_page for explanation */
if (!(vma->vm_flags & VM_WRITE))
flags |= TNF_NO_GROUP;
/*
@ -1358,12 +1350,17 @@ int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
if (migrated) {
flags |= TNF_MIGRATED;
page_nid = target_nid;
}
} else
flags |= TNF_MIGRATE_FAIL;
goto out;
clear_pmdnuma:
BUG_ON(!PageLocked(page));
was_writable = pmd_write(pmd);
pmd = pmd_modify(pmd, vma->vm_page_prot);
pmd = pmd_mkyoung(pmd);
if (was_writable)
pmd = pmd_mkwrite(pmd);
set_pmd_at(mm, haddr, pmdp, pmd);
update_mmu_cache_pmd(vma, addr, pmdp);
unlock_page(page);
@ -1487,6 +1484,7 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
if (__pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
pmd_t entry;
bool preserve_write = prot_numa && pmd_write(*pmd);
ret = 1;
/*
@ -1502,9 +1500,11 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd,
if (!prot_numa || !pmd_protnone(*pmd)) {
entry = pmdp_get_and_clear_notify(mm, addr, pmd);
entry = pmd_modify(entry, newprot);
if (preserve_write)
entry = pmd_mkwrite(entry);
ret = HPAGE_PMD_NR;
set_pmd_at(mm, addr, pmd, entry);
BUG_ON(pmd_write(entry));
BUG_ON(!preserve_write && pmd_write(entry));
}
spin_unlock(ptl);
}

22
mm/memory.c
View File

@ -3035,6 +3035,7 @@ static int do_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
int last_cpupid;
int target_nid;
bool migrated = false;
bool was_writable = pte_write(pte);
int flags = 0;
/* A PROT_NONE fault should not end up here */
@ -3059,6 +3060,8 @@ static int do_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
/* Make it present again */
pte = pte_modify(pte, vma->vm_page_prot);
pte = pte_mkyoung(pte);
if (was_writable)
pte = pte_mkwrite(pte);
set_pte_at(mm, addr, ptep, pte);
update_mmu_cache(vma, addr, ptep);
@ -3069,16 +3072,14 @@ static int do_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
}
/*
* Avoid grouping on DSO/COW pages in specific and RO pages
* in general, RO pages shouldn't hurt as much anyway since
* they can be in shared cache state.
*
* FIXME! This checks "pmd_dirty()" as an approximation of
* "is this a read-only page", since checking "pmd_write()"
* is even more broken. We haven't actually turned this into
* a writable page, so pmd_write() will always be false.
* Avoid grouping on RO pages in general. RO pages shouldn't hurt as
* much anyway since they can be in shared cache state. This misses
* the case where a mapping is writable but the process never writes
* to it but pte_write gets cleared during protection updates and
* pte_dirty has unpredictable behaviour between PTE scan updates,
* background writeback, dirty balancing and application behaviour.
*/
if (!pte_dirty(pte))
if (!(vma->vm_flags & VM_WRITE))
flags |= TNF_NO_GROUP;
/*
@ -3102,7 +3103,8 @@ static int do_numa_page(struct mm_struct *mm, struct vm_area_struct *vma,
if (migrated) {
page_nid = target_nid;
flags |= TNF_MIGRATED;
}
} else
flags |= TNF_MIGRATE_FAIL;
out:
if (page_nid != -1)

13
mm/memory_hotplug.c
View File

@ -1092,6 +1092,10 @@ static pg_data_t __ref *hotadd_new_pgdat(int nid, u64 start)
return NULL;
arch_refresh_nodedata(nid, pgdat);
} else {
/* Reset the nr_zones and classzone_idx to 0 before reuse */
pgdat->nr_zones = 0;
pgdat->classzone_idx = 0;
}
/* we can use NODE_DATA(nid) from here */
@ -1977,15 +1981,6 @@ void try_offline_node(int nid)
if (is_vmalloc_addr(zone->wait_table))
vfree(zone->wait_table);
}
/*
* Since there is no way to guarentee the address of pgdat/zone is not
* on stack of any kernel threads or used by other kernel objects
* without reference counting or other symchronizing method, do not
* reset node_data and free pgdat here. Just reset it to 0 and reuse
* the memory when the node is online again.
*/
memset(pgdat, 0, sizeof(*pgdat));
}
EXPORT_SYMBOL(try_offline_node);

4
mm/mmap.c
View File

@ -774,10 +774,8 @@ again: remove_next = 1 + (end > next->vm_end);
importer->anon_vma = exporter->anon_vma;
error = anon_vma_clone(importer, exporter);
if (error) {
importer->anon_vma = NULL;
if (error)
return error;
}
}
}

3
mm/mprotect.c
View File

@ -75,6 +75,7 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
oldpte = *pte;
if (pte_present(oldpte)) {
pte_t ptent;
bool preserve_write = prot_numa && pte_write(oldpte);
/*
* Avoid trapping faults against the zero or KSM
@ -94,6 +95,8 @@ static unsigned long change_pte_range(struct vm_area_struct *vma, pmd_t *pmd,
ptent = ptep_modify_prot_start(mm, addr, pte);
ptent = pte_modify(ptent, newprot);
if (preserve_write)
ptent = pte_mkwrite(ptent);
/* Avoid taking write faults for known dirty pages */
if (dirty_accountable && pte_dirty(ptent) &&

1
mm/page_isolation.c
View File

@ -103,6 +103,7 @@ void unset_migratetype_isolate(struct page *page, unsigned migratetype)
if (!is_migrate_isolate_page(buddy)) {
__isolate_free_page(page, order);
kernel_map_pages(page, (1 << order), 1);
set_page_refcounted(page);
isolated_page = page;
}

9
mm/pagewalk.c
View File

@ -265,8 +265,15 @@ int walk_page_range(unsigned long start, unsigned long end,
vma = vma->vm_next;
err = walk_page_test(start, next, walk);
if (err > 0)
if (err > 0) {
/*
* positive return values are purely for
* controlling the pagewalk, so should never
* be passed to the callers.
*/
err = 0;
continue;
}
if (err < 0)
break;
}

7
mm/rmap.c
View File

@ -287,6 +287,13 @@ int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src)
return 0;
enomem_failure:
/*
* dst->anon_vma is dropped here otherwise its degree can be incorrectly
* decremented in unlink_anon_vmas().
* We can safely do this because callers of anon_vma_clone() don't care
* about dst->anon_vma if anon_vma_clone() failed.
*/
dst->anon_vma = NULL;
unlink_anon_vmas(dst);
return -ENOMEM;
}

6
mm/slub.c
View File

@ -2449,7 +2449,8 @@ redo:
do {
tid = this_cpu_read(s->cpu_slab->tid);
c = raw_cpu_ptr(s->cpu_slab);
} while (IS_ENABLED(CONFIG_PREEMPT) && unlikely(tid != c->tid));
} while (IS_ENABLED(CONFIG_PREEMPT) &&
unlikely(tid != READ_ONCE(c->tid)));
/*
* Irqless object alloc/free algorithm used here depends on sequence
@ -2718,7 +2719,8 @@ redo:
do {
tid = this_cpu_read(s->cpu_slab->tid);
c = raw_cpu_ptr(s->cpu_slab);
} while (IS_ENABLED(CONFIG_PREEMPT) && unlikely(tid != c->tid));
} while (IS_ENABLED(CONFIG_PREEMPT) &&
unlikely(tid != READ_ONCE(c->tid)));
/* Same with comment on barrier() in slab_alloc_node() */
barrier();