提交 d559db08 编写于 作者: K KAMEZAWA Hiroyuki 提交者: Linus Torvalds

mm: clean up mm_counter

Presently, per-mm statistics counter is defined by macro in sched.h

This patch modifies it to
  - defined in mm.h as inlinf functions
  - use array instead of macro's name creation.

This patch is for reducing patch size in future patch to modify
implementation of per-mm counter.
Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: NMinchan Kim <minchan.kim@gmail.com>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 19b629f5
......@@ -65,11 +65,11 @@ unsigned long task_vsize(struct mm_struct *mm)
int task_statm(struct mm_struct *mm, int *shared, int *text,
int *data, int *resident)
{
*shared = get_mm_counter(mm, file_rss);
*shared = get_mm_counter(mm, MM_FILEPAGES);
*text = (PAGE_ALIGN(mm->end_code) - (mm->start_code & PAGE_MASK))
>> PAGE_SHIFT;
*data = mm->total_vm - mm->shared_vm;
*resident = *shared + get_mm_counter(mm, anon_rss);
*resident = *shared + get_mm_counter(mm, MM_ANONPAGES);
return mm->total_vm;
}
......
......@@ -870,6 +870,110 @@ extern int mprotect_fixup(struct vm_area_struct *vma,
*/
int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
struct page **pages);
/*
* per-process(per-mm_struct) statistics.
*/
#if USE_SPLIT_PTLOCKS
/*
* The mm counters are not protected by its page_table_lock,
* so must be incremented atomically.
*/
static inline void set_mm_counter(struct mm_struct *mm, int member, long value)
{
atomic_long_set(&mm->rss_stat.count[member], value);
}
static inline unsigned long get_mm_counter(struct mm_struct *mm, int member)
{
return (unsigned long)atomic_long_read(&mm->rss_stat.count[member]);
}
static inline void add_mm_counter(struct mm_struct *mm, int member, long value)
{
atomic_long_add(value, &mm->rss_stat.count[member]);
}
static inline void inc_mm_counter(struct mm_struct *mm, int member)
{
atomic_long_inc(&mm->rss_stat.count[member]);
}
static inline void dec_mm_counter(struct mm_struct *mm, int member)
{
atomic_long_dec(&mm->rss_stat.count[member]);
}
#else /* !USE_SPLIT_PTLOCKS */
/*
* The mm counters are protected by its page_table_lock,
* so can be incremented directly.
*/
static inline void set_mm_counter(struct mm_struct *mm, int member, long value)
{
mm->rss_stat.count[member] = value;
}
static inline unsigned long get_mm_counter(struct mm_struct *mm, int member)
{
return mm->rss_stat.count[member];
}
static inline void add_mm_counter(struct mm_struct *mm, int member, long value)
{
mm->rss_stat.count[member] += value;
}
static inline void inc_mm_counter(struct mm_struct *mm, int member)
{
mm->rss_stat.count[member]++;
}
static inline void dec_mm_counter(struct mm_struct *mm, int member)
{
mm->rss_stat.count[member]--;
}
#endif /* !USE_SPLIT_PTLOCKS */
static inline unsigned long get_mm_rss(struct mm_struct *mm)
{
return get_mm_counter(mm, MM_FILEPAGES) +
get_mm_counter(mm, MM_ANONPAGES);
}
static inline unsigned long get_mm_hiwater_rss(struct mm_struct *mm)
{
return max(mm->hiwater_rss, get_mm_rss(mm));
}
static inline unsigned long get_mm_hiwater_vm(struct mm_struct *mm)
{
return max(mm->hiwater_vm, mm->total_vm);
}
static inline void update_hiwater_rss(struct mm_struct *mm)
{
unsigned long _rss = get_mm_rss(mm);
if ((mm)->hiwater_rss < _rss)
(mm)->hiwater_rss = _rss;
}
static inline void update_hiwater_vm(struct mm_struct *mm)
{
if (mm->hiwater_vm < mm->total_vm)
mm->hiwater_vm = mm->total_vm;
}
static inline void setmax_mm_hiwater_rss(unsigned long *maxrss,
struct mm_struct *mm)
{
unsigned long hiwater_rss = get_mm_hiwater_rss(mm);
if (*maxrss < hiwater_rss)
*maxrss = hiwater_rss;
}
/*
* A callback you can register to apply pressure to ageable caches.
......
......@@ -24,12 +24,6 @@ struct address_space;
#define USE_SPLIT_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
#if USE_SPLIT_PTLOCKS
typedef atomic_long_t mm_counter_t;
#else /* !USE_SPLIT_PTLOCKS */
typedef unsigned long mm_counter_t;
#endif /* !USE_SPLIT_PTLOCKS */
/*
* Each physical page in the system has a struct page associated with
* it to keep track of whatever it is we are using the page for at the
......@@ -201,6 +195,22 @@ struct core_state {
struct completion startup;
};
enum {
MM_FILEPAGES,
MM_ANONPAGES,
NR_MM_COUNTERS
};
#if USE_SPLIT_PTLOCKS
struct mm_rss_stat {
atomic_long_t count[NR_MM_COUNTERS];
};
#else /* !USE_SPLIT_PTLOCKS */
struct mm_rss_stat {
unsigned long count[NR_MM_COUNTERS];
};
#endif /* !USE_SPLIT_PTLOCKS */
struct mm_struct {
struct vm_area_struct * mmap; /* list of VMAs */
struct rb_root mm_rb;
......@@ -227,11 +237,6 @@ struct mm_struct {
* by mmlist_lock
*/
/* Special counters, in some configurations protected by the
* page_table_lock, in other configurations by being atomic.
*/
mm_counter_t _file_rss;
mm_counter_t _anon_rss;
unsigned long hiwater_rss; /* High-watermark of RSS usage */
unsigned long hiwater_vm; /* High-water virtual memory usage */
......@@ -244,6 +249,12 @@ struct mm_struct {
unsigned long saved_auxv[AT_VECTOR_SIZE]; /* for /proc/PID/auxv */
/*
* Special counters, in some configurations protected by the
* page_table_lock, in other configurations by being atomic.
*/
struct mm_rss_stat rss_stat;
struct linux_binfmt *binfmt;
cpumask_t cpu_vm_mask;
......
......@@ -396,60 +396,6 @@ extern void arch_unmap_area_topdown(struct mm_struct *, unsigned long);
static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
#endif
#if USE_SPLIT_PTLOCKS
/*
* The mm counters are not protected by its page_table_lock,
* so must be incremented atomically.
*/
#define set_mm_counter(mm, member, value) atomic_long_set(&(mm)->_##member, value)
#define get_mm_counter(mm, member) ((unsigned long)atomic_long_read(&(mm)->_##member))
#define add_mm_counter(mm, member, value) atomic_long_add(value, &(mm)->_##member)
#define inc_mm_counter(mm, member) atomic_long_inc(&(mm)->_##member)
#define dec_mm_counter(mm, member) atomic_long_dec(&(mm)->_##member)
#else /* !USE_SPLIT_PTLOCKS */
/*
* The mm counters are protected by its page_table_lock,
* so can be incremented directly.
*/
#define set_mm_counter(mm, member, value) (mm)->_##member = (value)
#define get_mm_counter(mm, member) ((mm)->_##member)
#define add_mm_counter(mm, member, value) (mm)->_##member += (value)
#define inc_mm_counter(mm, member) (mm)->_##member++
#define dec_mm_counter(mm, member) (mm)->_##member--
#endif /* !USE_SPLIT_PTLOCKS */
#define get_mm_rss(mm) \
(get_mm_counter(mm, file_rss) + get_mm_counter(mm, anon_rss))
#define update_hiwater_rss(mm) do { \
unsigned long _rss = get_mm_rss(mm); \
if ((mm)->hiwater_rss < _rss) \
(mm)->hiwater_rss = _rss; \
} while (0)
#define update_hiwater_vm(mm) do { \
if ((mm)->hiwater_vm < (mm)->total_vm) \
(mm)->hiwater_vm = (mm)->total_vm; \
} while (0)
static inline unsigned long get_mm_hiwater_rss(struct mm_struct *mm)
{
return max(mm->hiwater_rss, get_mm_rss(mm));
}
static inline void setmax_mm_hiwater_rss(unsigned long *maxrss,
struct mm_struct *mm)
{
unsigned long hiwater_rss = get_mm_hiwater_rss(mm);
if (*maxrss < hiwater_rss)
*maxrss = hiwater_rss;
}
static inline unsigned long get_mm_hiwater_vm(struct mm_struct *mm)
{
return max(mm->hiwater_vm, mm->total_vm);
}
extern void set_dumpable(struct mm_struct *mm, int value);
extern int get_dumpable(struct mm_struct *mm);
......
......@@ -455,8 +455,7 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
(current->mm->flags & MMF_INIT_MASK) : default_dump_filter;
mm->core_state = NULL;
mm->nr_ptes = 0;
set_mm_counter(mm, file_rss, 0);
set_mm_counter(mm, anon_rss, 0);
memset(&mm->rss_stat, 0, sizeof(mm->rss_stat));
spin_lock_init(&mm->page_table_lock);
mm->free_area_cache = TASK_UNMAPPED_BASE;
mm->cached_hole_size = ~0UL;
......
......@@ -21,6 +21,7 @@
#include <linux/tsacct_kern.h>
#include <linux/acct.h>
#include <linux/jiffies.h>
#include <linux/mm.h>
/*
* fill in basic accounting fields
......
......@@ -194,7 +194,7 @@ __xip_unmap (struct address_space * mapping,
flush_cache_page(vma, address, pte_pfn(*pte));
pteval = ptep_clear_flush_notify(vma, address, pte);
page_remove_rmap(page);
dec_mm_counter(mm, file_rss);
dec_mm_counter(mm, MM_FILEPAGES);
BUG_ON(pte_dirty(pteval));
pte_unmap_unlock(pte, ptl);
page_cache_release(page);
......
......@@ -40,7 +40,7 @@ static void zap_pte(struct mm_struct *mm, struct vm_area_struct *vma,
page_remove_rmap(page);
page_cache_release(page);
update_hiwater_rss(mm);
dec_mm_counter(mm, file_rss);
dec_mm_counter(mm, MM_FILEPAGES);
}
} else {
if (!pte_file(pte))
......
......@@ -121,6 +121,7 @@ static int __init init_zero_pfn(void)
}
core_initcall(init_zero_pfn);
/*
* If a p?d_bad entry is found while walking page tables, report
* the error, before resetting entry to p?d_none. Usually (but
......@@ -376,12 +377,18 @@ int __pte_alloc_kernel(pmd_t *pmd, unsigned long address)
return 0;
}
static inline void add_mm_rss(struct mm_struct *mm, int file_rss, int anon_rss)
static inline void init_rss_vec(int *rss)
{
if (file_rss)
add_mm_counter(mm, file_rss, file_rss);
if (anon_rss)
add_mm_counter(mm, anon_rss, anon_rss);
memset(rss, 0, sizeof(int) * NR_MM_COUNTERS);
}
static inline void add_mm_rss_vec(struct mm_struct *mm, int *rss)
{
int i;
for (i = 0; i < NR_MM_COUNTERS; i++)
if (rss[i])
add_mm_counter(mm, i, rss[i]);
}
/*
......@@ -632,7 +639,10 @@ copy_one_pte(struct mm_struct *dst_mm, struct mm_struct *src_mm,
if (page) {
get_page(page);
page_dup_rmap(page);
rss[PageAnon(page)]++;
if (PageAnon(page))
rss[MM_ANONPAGES]++;
else
rss[MM_FILEPAGES]++;
}
out_set_pte:
......@@ -648,11 +658,12 @@ static int copy_pte_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
pte_t *src_pte, *dst_pte;
spinlock_t *src_ptl, *dst_ptl;
int progress = 0;
int rss[2];
int rss[NR_MM_COUNTERS];
swp_entry_t entry = (swp_entry_t){0};
again:
rss[1] = rss[0] = 0;
init_rss_vec(rss);
dst_pte = pte_alloc_map_lock(dst_mm, dst_pmd, addr, &dst_ptl);
if (!dst_pte)
return -ENOMEM;
......@@ -688,7 +699,7 @@ static int copy_pte_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
arch_leave_lazy_mmu_mode();
spin_unlock(src_ptl);
pte_unmap_nested(orig_src_pte);
add_mm_rss(dst_mm, rss[0], rss[1]);
add_mm_rss_vec(dst_mm, rss);
pte_unmap_unlock(orig_dst_pte, dst_ptl);
cond_resched();
......@@ -816,8 +827,9 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
struct mm_struct *mm = tlb->mm;
pte_t *pte;
spinlock_t *ptl;
int file_rss = 0;
int anon_rss = 0;
int rss[NR_MM_COUNTERS];
init_rss_vec(rss);
pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
arch_enter_lazy_mmu_mode();
......@@ -863,14 +875,14 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
set_pte_at(mm, addr, pte,
pgoff_to_pte(page->index));
if (PageAnon(page))
anon_rss--;
rss[MM_ANONPAGES]--;
else {
if (pte_dirty(ptent))
set_page_dirty(page);
if (pte_young(ptent) &&
likely(!VM_SequentialReadHint(vma)))
mark_page_accessed(page);
file_rss--;
rss[MM_FILEPAGES]--;
}
page_remove_rmap(page);
if (unlikely(page_mapcount(page) < 0))
......@@ -893,7 +905,7 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
} while (pte++, addr += PAGE_SIZE, (addr != end && *zap_work > 0));
add_mm_rss(mm, file_rss, anon_rss);
add_mm_rss_vec(mm, rss);
arch_leave_lazy_mmu_mode();
pte_unmap_unlock(pte - 1, ptl);
......@@ -1527,7 +1539,7 @@ static int insert_page(struct vm_area_struct *vma, unsigned long addr,
/* Ok, finally just insert the thing.. */
get_page(page);
inc_mm_counter(mm, file_rss);
inc_mm_counter(mm, MM_FILEPAGES);
page_add_file_rmap(page);
set_pte_at(mm, addr, pte, mk_pte(page, prot));
......@@ -2163,11 +2175,11 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
if (likely(pte_same(*page_table, orig_pte))) {
if (old_page) {
if (!PageAnon(old_page)) {
dec_mm_counter(mm, file_rss);
inc_mm_counter(mm, anon_rss);
dec_mm_counter(mm, MM_FILEPAGES);
inc_mm_counter(mm, MM_ANONPAGES);
}
} else
inc_mm_counter(mm, anon_rss);
inc_mm_counter(mm, MM_ANONPAGES);
flush_cache_page(vma, address, pte_pfn(orig_pte));
entry = mk_pte(new_page, vma->vm_page_prot);
entry = maybe_mkwrite(pte_mkdirty(entry), vma);
......@@ -2604,7 +2616,7 @@ static int do_swap_page(struct mm_struct *mm, struct vm_area_struct *vma,
* discarded at swap_free().
*/
inc_mm_counter(mm, anon_rss);
inc_mm_counter(mm, MM_ANONPAGES);
pte = mk_pte(page, vma->vm_page_prot);
if ((flags & FAULT_FLAG_WRITE) && reuse_swap_page(page)) {
pte = maybe_mkwrite(pte_mkdirty(pte), vma);
......@@ -2688,7 +2700,7 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
if (!pte_none(*page_table))
goto release;
inc_mm_counter(mm, anon_rss);
inc_mm_counter(mm, MM_ANONPAGES);
page_add_new_anon_rmap(page, vma, address);
setpte:
set_pte_at(mm, address, page_table, entry);
......@@ -2842,10 +2854,10 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
if (flags & FAULT_FLAG_WRITE)
entry = maybe_mkwrite(pte_mkdirty(entry), vma);
if (anon) {
inc_mm_counter(mm, anon_rss);
inc_mm_counter(mm, MM_ANONPAGES);
page_add_new_anon_rmap(page, vma, address);
} else {
inc_mm_counter(mm, file_rss);
inc_mm_counter(mm, MM_FILEPAGES);
page_add_file_rmap(page);
if (flags & FAULT_FLAG_WRITE) {
dirty_page = page;
......
......@@ -401,8 +401,8 @@ static void __oom_kill_task(struct task_struct *p, int verbose)
"vsz:%lukB, anon-rss:%lukB, file-rss:%lukB\n",
task_pid_nr(p), p->comm,
K(p->mm->total_vm),
K(get_mm_counter(p->mm, anon_rss)),
K(get_mm_counter(p->mm, file_rss)));
K(get_mm_counter(p->mm, MM_ANONPAGES)),
K(get_mm_counter(p->mm, MM_FILEPAGES)));
task_unlock(p);
/*
......
......@@ -815,9 +815,9 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
if (PageHWPoison(page) && !(flags & TTU_IGNORE_HWPOISON)) {
if (PageAnon(page))
dec_mm_counter(mm, anon_rss);
dec_mm_counter(mm, MM_ANONPAGES);
else
dec_mm_counter(mm, file_rss);
dec_mm_counter(mm, MM_FILEPAGES);
set_pte_at(mm, address, pte,
swp_entry_to_pte(make_hwpoison_entry(page)));
} else if (PageAnon(page)) {
......@@ -839,7 +839,7 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
list_add(&mm->mmlist, &init_mm.mmlist);
spin_unlock(&mmlist_lock);
}
dec_mm_counter(mm, anon_rss);
dec_mm_counter(mm, MM_ANONPAGES);
} else if (PAGE_MIGRATION) {
/*
* Store the pfn of the page in a special migration
......@@ -857,7 +857,7 @@ int try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
entry = make_migration_entry(page, pte_write(pteval));
set_pte_at(mm, address, pte, swp_entry_to_pte(entry));
} else
dec_mm_counter(mm, file_rss);
dec_mm_counter(mm, MM_FILEPAGES);
page_remove_rmap(page);
page_cache_release(page);
......@@ -996,7 +996,7 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount,
page_remove_rmap(page);
page_cache_release(page);
dec_mm_counter(mm, file_rss);
dec_mm_counter(mm, MM_FILEPAGES);
(*mapcount)--;
}
pte_unmap_unlock(pte - 1, ptl);
......
......@@ -840,7 +840,7 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
goto out;
}
inc_mm_counter(vma->vm_mm, anon_rss);
inc_mm_counter(vma->vm_mm, MM_ANONPAGES);
get_page(page);
set_pte_at(vma->vm_mm, addr, pte,
pte_mkold(mk_pte(page, vma->vm_page_prot)));
......
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