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-rw-r--r--mm/memory.c56
1 files changed, 34 insertions, 22 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 72fb5f39bccc..c57678478801 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -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 @@ again:
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 @@ gotten:
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;

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