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mm: convert totalram_pages and totalhigh_pages variables to atomic 

totalram_pages and totalhigh_pages are made static inline function.

Main motivation was that managed_page_count_lock handling was complicating
things.  It was discussed in length here,
https://lore.kernel.org/patchwork/patch/995739/#1181785 So it seemes
better to remove the lock and convert variables to atomic, with preventing
poteintial store-to-read tearing as a bonus.

[akpm@linux-foundation.org: coding style fixes]
Link: http://lkml.kernel.org/r/1542090790-21750-4-git-send-email-arunks@codeaurora.org
Signed-off-by: Arun KS <arunks@codeaurora.org>
Suggested-by: Michal Hocko <mhocko@suse.com>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arun KS 2018-12-28 00:34:29 -08:00 committed by Linus Torvalds
parent 9705bea5f8
commit ca79b0c211
53 changed files with 131 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/csky/mm/init.c
View File

@ -71,7 +71,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
ClearPageReserved(virt_to_page(start));
init_page_count(virt_to_page(start));
free_page(start);
totalram_pages++;
totalram_pages_inc();
}
}
#endif
@ -88,7 +88,7 @@ void free_initmem(void)
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
totalram_pages++;
totalram_pages_inc();
addr += PAGE_SIZE;
}

10
arch/powerpc/platforms/pseries/cmm.c
View File

@ -208,7 +208,7 @@ static long cmm_alloc_pages(long nr)
pa->page[pa->index++] = addr;
loaned_pages++;
totalram_pages--;
totalram_pages_dec();
spin_unlock(&cmm_lock);
nr--;
}
@ -247,7 +247,7 @@ static long cmm_free_pages(long nr)
free_page(addr);
loaned_pages--;
nr--;
totalram_pages++;
totalram_pages_inc();
}
spin_unlock(&cmm_lock);
cmm_dbg("End request with %ld pages unfulfilled\n", nr);
@ -291,7 +291,7 @@ static void cmm_get_mpp(void)
int rc;
struct hvcall_mpp_data mpp_data;
signed long active_pages_target, page_loan_request, target;
signed long total_pages = totalram_pages + loaned_pages;
signed long total_pages = totalram_pages() + loaned_pages;
signed long min_mem_pages = (min_mem_mb * 1024 * 1024) / PAGE_SIZE;
rc = h_get_mpp(&mpp_data);
@ -322,7 +322,7 @@ static void cmm_get_mpp(void)
cmm_dbg("delta = %ld, loaned = %lu, target = %lu, oom = %lu, totalram = %lu\n",
page_loan_request, loaned_pages, loaned_pages_target,
oom_freed_pages, totalram_pages);
oom_freed_pages, totalram_pages());
}
static struct notifier_block cmm_oom_nb = {
@ -581,7 +581,7 @@ static int cmm_mem_going_offline(void *arg)
free_page(pa_curr->page[idx]);
freed++;
loaned_pages--;
totalram_pages++;
totalram_pages_inc();
pa_curr->page[idx] = pa_last->page[--pa_last->index];
if (pa_last->index == 0) {
if (pa_curr == pa_last)

2
arch/s390/mm/init.c
View File

@ -59,7 +59,7 @@ static void __init setup_zero_pages(void)
order = 7;
/* Limit number of empty zero pages for small memory sizes */
while (order > 2 && (totalram_pages >> 10) < (1UL << order))
while (order > 2 && (totalram_pages() >> 10) < (1UL << order))
order--;
empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);

2
arch/um/kernel/mem.c
View File

@ -51,7 +51,7 @@ void __init mem_init(void)
/* this will put all low memory onto the freelists */
memblock_free_all();
max_low_pfn = totalram_pages;
max_low_pfn = totalram_pages();
max_pfn = max_low_pfn;
mem_init_print_info(NULL);
kmalloc_ok = 1;

2
arch/x86/kernel/cpu/microcode/core.c
View File

@ -434,7 +434,7 @@ static ssize_t microcode_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos)
{
ssize_t ret = -EINVAL;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
if ((len >> PAGE_SHIFT) > nr_pages) {
pr_err("too much data (max %ld pages)\n", nr_pages);

4
drivers/char/agp/backend.c
View File

@ -115,9 +115,9 @@ static int agp_find_max(void)
long memory, index, result;
#if PAGE_SHIFT < 20
memory = totalram_pages >> (20 - PAGE_SHIFT);
memory = totalram_pages() >> (20 - PAGE_SHIFT);
#else
memory = totalram_pages << (PAGE_SHIFT - 20);
memory = totalram_pages() << (PAGE_SHIFT - 20);
#endif
index = 1;

2
drivers/gpu/drm/i915/i915_gem.c
View File

@ -2559,7 +2559,7 @@ static int i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
* If there's no chance of allocating enough pages for the whole
* object, bail early.
*/
if (page_count > totalram_pages)
if (page_count > totalram_pages())
return -ENOMEM;
st = kmalloc(sizeof(*st), GFP_KERNEL);

4
drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
View File

@ -170,7 +170,7 @@ static int igt_ppgtt_alloc(void *arg)
* This should ensure that we do not run into the oomkiller during
* the test and take down the machine wilfully.
*/
limit = totalram_pages << PAGE_SHIFT;
limit = totalram_pages() << PAGE_SHIFT;
limit = min(ppgtt->vm.total, limit);
/* Check we can allocate the entire range */
@ -1244,7 +1244,7 @@ static int exercise_mock(struct drm_i915_private *i915,
u64 hole_start, u64 hole_end,
unsigned long end_time))
{
const u64 limit = totalram_pages << PAGE_SHIFT;
const u64 limit = totalram_pages() << PAGE_SHIFT;
struct i915_gem_context *ctx;
struct i915_hw_ppgtt *ppgtt;
IGT_TIMEOUT(end_time);

2
drivers/hv/hv_balloon.c
View File

@ -1090,7 +1090,7 @@ static void process_info(struct hv_dynmem_device *dm, struct dm_info_msg *msg)
static unsigned long compute_balloon_floor(void)
{
unsigned long min_pages;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
#define MB2PAGES(mb) ((mb) << (20 - PAGE_SHIFT))
/* Simple continuous piecewiese linear function:
* max MiB -> min MiB gradient

2
drivers/md/dm-bufio.c
View File

@ -1887,7 +1887,7 @@ static int __init dm_bufio_init(void)
dm_bufio_allocated_vmalloc = 0;
dm_bufio_current_allocated = 0;
mem = (__u64)mult_frac(totalram_pages - totalhigh_pages,
mem = (__u64)mult_frac(totalram_pages() - totalhigh_pages(),
DM_BUFIO_MEMORY_PERCENT, 100) << PAGE_SHIFT;
if (mem > ULONG_MAX)

2
drivers/md/dm-crypt.c
View File

@ -2158,7 +2158,7 @@ static int crypt_wipe_key(struct crypt_config *cc)
static void crypt_calculate_pages_per_client(void)
{
unsigned long pages = (totalram_pages - totalhigh_pages) * DM_CRYPT_MEMORY_PERCENT / 100;
unsigned long pages = (totalram_pages() - totalhigh_pages()) * DM_CRYPT_MEMORY_PERCENT / 100;
if (!dm_crypt_clients_n)
return;

2
drivers/md/dm-integrity.c
View File

@ -2843,7 +2843,7 @@ static int create_journal(struct dm_integrity_c *ic, char **error)
journal_pages = roundup((__u64)ic->journal_sections * ic->journal_section_sectors,
PAGE_SIZE >> SECTOR_SHIFT) >> (PAGE_SHIFT - SECTOR_SHIFT);
journal_desc_size = journal_pages * sizeof(struct page_list);
if (journal_pages >= totalram_pages - totalhigh_pages || journal_desc_size > ULONG_MAX) {
if (journal_pages >= totalram_pages() - totalhigh_pages() || journal_desc_size > ULONG_MAX) {
*error = "Journal doesn't fit into memory";
r = -ENOMEM;
goto bad;

2
drivers/md/dm-stats.c
View File

@ -85,7 +85,7 @@ static bool __check_shared_memory(size_t alloc_size)
a = shared_memory_amount + alloc_size;
if (a < shared_memory_amount)
return false;
if (a >> PAGE_SHIFT > totalram_pages / DM_STATS_MEMORY_FACTOR)
if (a >> PAGE_SHIFT > totalram_pages() / DM_STATS_MEMORY_FACTOR)
return false;
#ifdef CONFIG_MMU
if (a > (VMALLOC_END - VMALLOC_START) / DM_STATS_VMALLOC_FACTOR)

2
drivers/media/platform/mtk-vpu/mtk_vpu.c
View File

@ -855,7 +855,7 @@ static int mtk_vpu_probe(struct platform_device *pdev)
/* Set PTCM to 96K and DTCM to 32K */
vpu_cfg_writel(vpu, 0x2, VPU_TCM_CFG);
vpu->enable_4GB = !!(totalram_pages > (SZ_2G >> PAGE_SHIFT));
vpu->enable_4GB = !!(totalram_pages() > (SZ_2G >> PAGE_SHIFT));
dev_info(dev, "4GB mode %u\n", vpu->enable_4GB);
if (vpu->enable_4GB) {

2
drivers/misc/vmw_balloon.c
View File

@ -570,7 +570,7 @@ static int vmballoon_send_get_target(struct vmballoon *b)
unsigned long status;
unsigned long limit;
limit = totalram_pages;
limit = totalram_pages();
/* Ensure limit fits in 32-bits */
if (limit != (u32)limit)

4
drivers/parisc/ccio-dma.c
View File

@ -1251,7 +1251,7 @@ ccio_ioc_init(struct ioc *ioc)
** Hot-Plug/Removal of PCI cards. (aka PCI OLARD).
*/
iova_space_size = (u32) (totalram_pages / count_parisc_driver(&ccio_driver));
iova_space_size = (u32) (totalram_pages() / count_parisc_driver(&ccio_driver));
/* limit IOVA space size to 1MB-1GB */
@ -1290,7 +1290,7 @@ ccio_ioc_init(struct ioc *ioc)
DBG_INIT("%s() hpa 0x%p mem %luMB IOV %dMB (%d bits)\n",
__func__, ioc->ioc_regs,
(unsigned long) totalram_pages >> (20 - PAGE_SHIFT),
(unsigned long) totalram_pages() >> (20 - PAGE_SHIFT),
iova_space_size>>20,
iov_order + PAGE_SHIFT);

4
drivers/parisc/sba_iommu.c
View File

@ -1414,7 +1414,7 @@ sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
** for DMA hints - ergo only 30 bits max.
*/
iova_space_size = (u32) (totalram_pages/global_ioc_cnt);
iova_space_size = (u32) (totalram_pages()/global_ioc_cnt);
/* limit IOVA space size to 1MB-1GB */
if (iova_space_size < (1 << (20 - PAGE_SHIFT))) {
@ -1439,7 +1439,7 @@ sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n",
__func__,
ioc->ioc_hpa,
(unsigned long) totalram_pages >> (20 - PAGE_SHIFT),
(unsigned long) totalram_pages() >> (20 - PAGE_SHIFT),
iova_space_size>>20,
iov_order + PAGE_SHIFT);

2
drivers/staging/android/ion/ion_system_heap.c
View File

@ -110,7 +110,7 @@ static int ion_system_heap_allocate(struct ion_heap *heap,
unsigned long size_remaining = PAGE_ALIGN(size);
unsigned int max_order = orders[0];
if (size / PAGE_SIZE > totalram_pages / 2)
if (size / PAGE_SIZE > totalram_pages() / 2)
return -ENOMEM;
INIT_LIST_HEAD(&pages);

6
drivers/xen/xen-selfballoon.c
View File

@ -189,7 +189,7 @@ static void selfballoon_process(struct work_struct *work)
bool reset_timer = false;
if (xen_selfballooning_enabled) {
cur_pages = totalram_pages;
cur_pages = totalram_pages();
tgt_pages = cur_pages; /* default is no change */
goal_pages = vm_memory_committed() +
totalreserve_pages +
@ -227,7 +227,7 @@ static void selfballoon_process(struct work_struct *work)
if (tgt_pages < floor_pages)
tgt_pages = floor_pages;
balloon_set_new_target(tgt_pages +
balloon_stats.current_pages - totalram_pages);
balloon_stats.current_pages - totalram_pages());
reset_timer = true;
}
#ifdef CONFIG_FRONTSWAP
@ -569,7 +569,7 @@ int xen_selfballoon_init(bool use_selfballooning, bool use_frontswap_selfshrink)
* much more reliably and response faster in some cases.
*/
if (!selfballoon_reserved_mb) {
reserve_pages = totalram_pages / 10;
reserve_pages = totalram_pages() / 10;
selfballoon_reserved_mb = PAGES2MB(reserve_pages);
}
schedule_delayed_work(&selfballoon_worker, selfballoon_interval * HZ);

2
fs/ceph/super.h
View File

@ -810,7 +810,7 @@ static inline int default_congestion_kb(void)
* This allows larger machines to have larger/more transfers.
* Limit the default to 256M
*/
congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
if (congestion_kb > 256*1024)
congestion_kb = 256*1024;

2
fs/file_table.c
View File

@ -380,7 +380,7 @@ void __init files_init(void)
void __init files_maxfiles_init(void)
{
unsigned long n;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
unsigned long memreserve = (nr_pages - nr_free_pages()) * 3/2;
memreserve = min(memreserve, nr_pages - 1);

2
fs/fuse/inode.c
View File

@ -824,7 +824,7 @@ static const struct super_operations fuse_super_operations = {
static void sanitize_global_limit(unsigned *limit)
{
if (*limit == 0)
*limit = ((totalram_pages << PAGE_SHIFT) >> 13) /
*limit = ((totalram_pages() << PAGE_SHIFT) >> 13) /
sizeof(struct fuse_req);
if (*limit >= 1 << 16)

2
fs/nfs/write.c
View File

@ -2121,7 +2121,7 @@ int __init nfs_init_writepagecache(void)
* This allows larger machines to have larger/more transfers.
* Limit the default to 256M
*/
nfs_congestion_kb = (16*int_sqrt(totalram_pages)) << (PAGE_SHIFT-10);
nfs_congestion_kb = (16*int_sqrt(totalram_pages())) << (PAGE_SHIFT-10);
if (nfs_congestion_kb > 256*1024)
nfs_congestion_kb = 256*1024;

2
fs/nfsd/nfscache.c
View File

@ -99,7 +99,7 @@ static unsigned int
nfsd_cache_size_limit(void)
{
unsigned int limit;
unsigned long low_pages = totalram_pages - totalhigh_pages;
unsigned long low_pages = totalram_pages() - totalhigh_pages();
limit = (16 * int_sqrt(low_pages)) << (PAGE_SHIFT-10);
return min_t(unsigned int, limit, 256*1024);

2
fs/ntfs/malloc.h
View File

@ -47,7 +47,7 @@ static inline void *__ntfs_malloc(unsigned long size, gfp_t gfp_mask)
return kmalloc(PAGE_SIZE, gfp_mask & ~__GFP_HIGHMEM);
/* return (void *)__get_free_page(gfp_mask); */
}
if (likely((size >> PAGE_SHIFT) < totalram_pages))
if (likely((size >> PAGE_SHIFT) < totalram_pages()))
return __vmalloc(size, gfp_mask, PAGE_KERNEL);
return NULL;
}

2
fs/proc/base.c
View File

@ -530,7 +530,7 @@ static const struct file_operations proc_lstats_operations = {
static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task)
{
unsigned long totalpages = totalram_pages + total_swap_pages;
unsigned long totalpages = totalram_pages() + total_swap_pages;
unsigned long points = 0;
points = oom_badness(task, NULL, NULL, totalpages) *

28
include/linux/highmem.h
View File

@ -36,7 +36,31 @@ static inline void invalidate_kernel_vmap_range(void *vaddr, int size)
/* declarations for linux/mm/highmem.c */
unsigned int nr_free_highpages(void);
extern unsigned long totalhigh_pages;
extern atomic_long_t _totalhigh_pages;
static inline unsigned long totalhigh_pages(void)
{
return (unsigned long)atomic_long_read(&_totalhigh_pages);
}
static inline void totalhigh_pages_inc(void)
{
atomic_long_inc(&_totalhigh_pages);
}
static inline void totalhigh_pages_dec(void)
{
atomic_long_dec(&_totalhigh_pages);
}
static inline void totalhigh_pages_add(long count)
{
atomic_long_add(count, &_totalhigh_pages);
}
static inline void totalhigh_pages_set(long val)
{
atomic_long_set(&_totalhigh_pages, val);
}
void kmap_flush_unused(void);
@ -51,7 +75,7 @@ static inline struct page *kmap_to_page(void *addr)
return virt_to_page(addr);
}
#define totalhigh_pages 0UL
static inline unsigned long totalhigh_pages(void) { return 0UL; }
#ifndef ARCH_HAS_KMAP
static inline void *kmap(struct page *page)

27
include/linux/mm.h
View File

@ -48,7 +48,32 @@ static inline void set_max_mapnr(unsigned long limit)
static inline void set_max_mapnr(unsigned long limit) { }
#endif
extern unsigned long totalram_pages;
extern atomic_long_t _totalram_pages;
static inline unsigned long totalram_pages(void)
{
return (unsigned long)atomic_long_read(&_totalram_pages);
}
static inline void totalram_pages_inc(void)
{
atomic_long_inc(&_totalram_pages);
}
static inline void totalram_pages_dec(void)
{
atomic_long_dec(&_totalram_pages);
}
static inline void totalram_pages_add(long count)
{
atomic_long_add(count, &_totalram_pages);
}
static inline void totalram_pages_set(long val)
{
atomic_long_set(&_totalram_pages, val);
}
extern void * high_memory;
extern int page_cluster;

1
include/linux/swap.h
View File

@ -310,7 +310,6 @@ void workingset_update_node(struct xa_node *node);
} while (0)
/* linux/mm/page_alloc.c */
extern unsigned long totalram_pages;
extern unsigned long totalreserve_pages;
extern unsigned long nr_free_buffer_pages(void);
extern unsigned long nr_free_pagecache_pages(void);

2
kernel/fork.c
View File

@ -744,7 +744,7 @@ void __init __weak arch_task_cache_init(void) { }
static void set_max_threads(unsigned int max_threads_suggested)
{
u64 threads;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
/*
* The number of threads shall be limited such that the thread

2
kernel/kexec_core.c
View File

@ -152,7 +152,7 @@ int sanity_check_segment_list(struct kimage *image)
int i;
unsigned long nr_segments = image->nr_segments;
unsigned long total_pages = 0;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
/*
* Verify we have good destination addresses. The caller is

2
kernel/power/snapshot.c
View File

@ -105,7 +105,7 @@ unsigned long image_size;
void __init hibernate_image_size_init(void)
{
image_size = ((totalram_pages * 2) / 5) * PAGE_SIZE;
image_size = ((totalram_pages() * 2) / 5) * PAGE_SIZE;
}
/*

5
mm/highmem.c
View File

@ -105,9 +105,8 @@ static inline wait_queue_head_t *get_pkmap_wait_queue_head(unsigned int color)
}
#endif
unsigned long totalhigh_pages __read_mostly;
EXPORT_SYMBOL(totalhigh_pages);
atomic_long_t _totalhigh_pages __read_mostly;
EXPORT_SYMBOL(_totalhigh_pages);
EXPORT_PER_CPU_SYMBOL(__kmap_atomic_idx);

2
mm/huge_memory.c
View File

@ -420,7 +420,7 @@ static int __init hugepage_init(void)
* where the extra memory used could hurt more than TLB overhead
* is likely to save. The admin can still enable it through /sys.
*/
if (totalram_pages < (512 << (20 - PAGE_SHIFT))) {
if (totalram_pages() < (512 << (20 - PAGE_SHIFT))) {
transparent_hugepage_flags = 0;
return 0;
}

2
mm/kasan/quarantine.c
View File

@ -237,7 +237,7 @@ void quarantine_reduce(void)
* Update quarantine size in case of hotplug. Allocate a fraction of
* the installed memory to quarantine minus per-cpu queue limits.
*/
total_size = (READ_ONCE(totalram_pages) << PAGE_SHIFT) /
total_size = (totalram_pages() << PAGE_SHIFT) /
QUARANTINE_FRACTION;
percpu_quarantines = QUARANTINE_PERCPU_SIZE * num_online_cpus();
new_quarantine_size = (total_size < percpu_quarantines) ?

4
mm/memblock.c
View File

@ -1576,7 +1576,7 @@ void __init __memblock_free_late(phys_addr_t base, phys_addr_t size)
for (; cursor < end; cursor++) {
memblock_free_pages(pfn_to_page(cursor), cursor, 0);
totalram_pages++;
totalram_pages_inc();
}
}
@ -1978,7 +1978,7 @@ unsigned long __init memblock_free_all(void)
reset_all_zones_managed_pages();
pages = free_low_memory_core_early();
totalram_pages += pages;
totalram_pages_add(pages);
return pages;
}

2
mm/mm_init.c
View File

@ -146,7 +146,7 @@ static void __meminit mm_compute_batch(void)
s32 batch = max_t(s32, nr*2, 32);
/* batch size set to 0.4% of (total memory/#cpus), or max int32 */
memsized_batch = min_t(u64, (totalram_pages/nr)/256, 0x7fffffff);
memsized_batch = min_t(u64, (totalram_pages()/nr)/256, 0x7fffffff);
vm_committed_as_batch = max_t(s32, memsized_batch, batch);
}

2
mm/oom_kill.c
View File

@ -269,7 +269,7 @@ static enum oom_constraint constrained_alloc(struct oom_control *oc)
}
/* Default to all available memory */
oc->totalpages = totalram_pages + total_swap_pages;
oc->totalpages = totalram_pages() + total_swap_pages;
if (!IS_ENABLED(CONFIG_NUMA))
return CONSTRAINT_NONE;

20
mm/page_alloc.c
View File

@ -16,6 +16,7 @@
#include <linux/stddef.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/swap.h>
#include <linux/interrupt.h>
#include <linux/pagemap.h>
@ -124,7 +125,8 @@ EXPORT_SYMBOL(node_states);
/* Protect totalram_pages and zone->managed_pages */
static DEFINE_SPINLOCK(managed_page_count_lock);
unsigned long totalram_pages __read_mostly;
atomic_long_t _totalram_pages __read_mostly;
EXPORT_SYMBOL(_totalram_pages);
unsigned long totalreserve_pages __read_mostly;
unsigned long totalcma_pages __read_mostly;
@ -4747,11 +4749,11 @@ EXPORT_SYMBOL_GPL(si_mem_available);
void si_meminfo(struct sysinfo *val)
{
val->totalram = totalram_pages;
val->totalram = totalram_pages();
val->sharedram = global_node_page_state(NR_SHMEM);
val->freeram = global_zone_page_state(NR_FREE_PAGES);
val->bufferram = nr_blockdev_pages();
val->totalhigh = totalhigh_pages;
val->totalhigh = totalhigh_pages();
val->freehigh = nr_free_highpages();
val->mem_unit = PAGE_SIZE;
}
@ -7077,10 +7079,10 @@ void adjust_managed_page_count(struct page *page, long count)
{
spin_lock(&managed_page_count_lock);
atomic_long_add(count, &page_zone(page)->managed_pages);
totalram_pages += count;
totalram_pages_add(count);
#ifdef CONFIG_HIGHMEM
if (PageHighMem(page))
totalhigh_pages += count;
totalhigh_pages_add(count);
#endif
spin_unlock(&managed_page_count_lock);
}
@ -7123,9 +7125,9 @@ EXPORT_SYMBOL(free_reserved_area);
void free_highmem_page(struct page *page)
{
__free_reserved_page(page);
totalram_pages++;
totalram_pages_inc();
atomic_long_inc(&page_zone(page)->managed_pages);
totalhigh_pages++;
totalhigh_pages_inc();
}
#endif
@ -7174,10 +7176,10 @@ void __init mem_init_print_info(const char *str)
physpages << (PAGE_SHIFT - 10),
codesize >> 10, datasize >> 10, rosize >> 10,
(init_data_size + init_code_size) >> 10, bss_size >> 10,
(physpages - totalram_pages - totalcma_pages) << (PAGE_SHIFT - 10),
(physpages - totalram_pages() - totalcma_pages) << (PAGE_SHIFT - 10),
totalcma_pages << (PAGE_SHIFT - 10),
#ifdef CONFIG_HIGHMEM
totalhigh_pages << (PAGE_SHIFT - 10),
totalhigh_pages() << (PAGE_SHIFT - 10),
#endif
str ? ", " : "", str ? str : "");
}

9
mm/shmem.c
View File

@ -109,13 +109,14 @@ struct shmem_falloc {
#ifdef CONFIG_TMPFS
static unsigned long shmem_default_max_blocks(void)
{
return totalram_pages / 2;
return totalram_pages() / 2;
}
static unsigned long shmem_default_max_inodes(void)
{
unsigned long nr_pages = totalram_pages;
return min(nr_pages - totalhigh_pages, nr_pages / 2);
unsigned long nr_pages = totalram_pages();
return min(nr_pages - totalhigh_pages(), nr_pages / 2);
}
#endif
@ -3302,7 +3303,7 @@ static int shmem_parse_options(char *options, struct shmem_sb_info *sbinfo,
size = memparse(value,&rest);
if (*rest == '%') {
size <<= PAGE_SHIFT;
size *= totalram_pages;
size *= totalram_pages();
do_div(size, 100);
rest++;
}

2
mm/slab.c
View File

@ -1235,7 +1235,7 @@ void __init kmem_cache_init(void)
* page orders on machines with more than 32MB of memory if
* not overridden on the command line.
*/
if (!slab_max_order_set && totalram_pages > (32 << 20) >> PAGE_SHIFT)
if (!slab_max_order_set && totalram_pages() > (32 << 20) >> PAGE_SHIFT)
slab_max_order = SLAB_MAX_ORDER_HI;
/* Bootstrap is tricky, because several objects are allocated

2
mm/swap.c
View File

@ -1022,7 +1022,7 @@ EXPORT_SYMBOL(pagevec_lookup_range_nr_tag);
*/
void __init swap_setup(void)
{
unsigned long megs = totalram_pages >> (20 - PAGE_SHIFT);
unsigned long megs = totalram_pages() >> (20 - PAGE_SHIFT);
/* Use a smaller cluster for small-memory machines */
if (megs < 16)

2
mm/util.c
View File

@ -593,7 +593,7 @@ unsigned long vm_commit_limit(void)
if (sysctl_overcommit_kbytes)
allowed = sysctl_overcommit_kbytes >> (PAGE_SHIFT - 10);
else
allowed = ((totalram_pages - hugetlb_total_pages())
allowed = ((totalram_pages() - hugetlb_total_pages())
* sysctl_overcommit_ratio / 100);
allowed += total_swap_pages;

4
mm/vmalloc.c
View File

@ -1634,7 +1634,7 @@ void *vmap(struct page **pages, unsigned int count,
might_sleep();
if (count > totalram_pages)
if (count > totalram_pages())
return NULL;
size = (unsigned long)count << PAGE_SHIFT;
@ -1739,7 +1739,7 @@ void *__vmalloc_node_range(unsigned long size, unsigned long align,
unsigned long real_size = size;
size = PAGE_ALIGN(size);
if (!size || (size >> PAGE_SHIFT) > totalram_pages)
if (!size || (size >> PAGE_SHIFT) > totalram_pages())
goto fail;
area = __get_vm_area_node(size, align, VM_ALLOC | VM_UNINITIALIZED |

2
mm/workingset.c
View File

@ -549,7 +549,7 @@ static int __init workingset_init(void)
* double the initial memory by using totalram_pages as-is.
*/
timestamp_bits = BITS_PER_LONG - EVICTION_SHIFT;
max_order = fls_long(totalram_pages - 1);
max_order = fls_long(totalram_pages() - 1);
if (max_order > timestamp_bits)
bucket_order = max_order - timestamp_bits;
pr_info("workingset: timestamp_bits=%d max_order=%d bucket_order=%u\n",

2
mm/zswap.c
View File

@ -219,7 +219,7 @@ static const struct zpool_ops zswap_zpool_ops = {
static bool zswap_is_full(void)
{
return totalram_pages * zswap_max_pool_percent / 100 <
return totalram_pages() * zswap_max_pool_percent / 100 <
DIV_ROUND_UP(zswap_pool_total_size, PAGE_SIZE);
}

2
net/dccp/proto.c
View File

@ -1131,7 +1131,7 @@ EXPORT_SYMBOL_GPL(dccp_debug);
static int __init dccp_init(void)
{
unsigned long goal;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
int ehash_order, bhash_order, i;
int rc;

2
net/decnet/dn_route.c
View File

@ -1866,7 +1866,7 @@ void __init dn_route_init(void)
dn_route_timer.expires = jiffies + decnet_dst_gc_interval * HZ;
add_timer(&dn_route_timer);
goal = totalram_pages >> (26 - PAGE_SHIFT);
goal = totalram_pages() >> (26 - PAGE_SHIFT);
for(order = 0; (1UL << order) < goal; order++)
/* NOTHING */;

2
net/ipv4/tcp_metrics.c
View File

@ -1000,7 +1000,7 @@ static int __net_init tcp_net_metrics_init(struct net *net)
slots = tcpmhash_entries;
if (!slots) {
if (totalram_pages >= 128 * 1024)
if (totalram_pages() >= 128 * 1024)
slots = 16 * 1024;
else
slots = 8 * 1024;

2
net/netfilter/nf_conntrack_core.c
View File

@ -2248,7 +2248,7 @@ static __always_inline unsigned int total_extension_size(void)
int nf_conntrack_init_start(void)
{
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
int max_factor = 8;
int ret = -ENOMEM;
int i;

2
net/netfilter/xt_hashlimit.c
View File

@ -274,7 +274,7 @@ static int htable_create(struct net *net, struct hashlimit_cfg3 *cfg,
struct xt_hashlimit_htable *hinfo;
const struct seq_operations *ops;
unsigned int size, i;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
int ret;
if (cfg->size) {

2
net/sctp/protocol.c
View File

@ -1368,7 +1368,7 @@ static __init int sctp_init(void)
int status = -EINVAL;
unsigned long goal;
unsigned long limit;
unsigned long nr_pages = totalram_pages;
unsigned long nr_pages = totalram_pages();
int max_share;
int order;
int num_entries;

2
security/integrity/ima/ima_kexec.c
View File

@ -106,7 +106,7 @@ void ima_add_kexec_buffer(struct kimage *image)
kexec_segment_size = ALIGN(ima_get_binary_runtime_size() +
PAGE_SIZE / 2, PAGE_SIZE);
if ((kexec_segment_size == ULONG_MAX) ||
((kexec_segment_size >> PAGE_SHIFT) > totalram_pages / 2)) {
((kexec_segment_size >> PAGE_SHIFT) > totalram_pages() / 2)) {
pr_err("Binary measurement list too large.\n");
return;
}