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-rw-r--r--mm/fremap.c4
-rw-r--r--mm/hugetlb.c3
-rw-r--r--mm/memory.c17
-rw-r--r--mm/mmap.c4
-rw-r--r--mm/mremap.c12
-rw-r--r--mm/nommu.c15
-rw-r--r--mm/rmap.c6
7 files changed, 29 insertions, 32 deletions
diff --git a/mm/fremap.c b/mm/fremap.c
index 7f08d10..49719a3 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -143,8 +143,10 @@ int install_file_pte(struct mm_struct *mm, struct vm_area_struct *vma,
if (!pte)
goto err_unlock;
- if (!pte_none(*pte) && zap_pte(mm, vma, addr, pte))
+ if (!pte_none(*pte) && zap_pte(mm, vma, addr, pte)) {
+ update_hiwater_rss(mm);
dec_mm_counter(mm, file_rss);
+ }
set_pte_at(mm, addr, pte, pgoff_to_pte(pgoff));
pte_val = *pte;
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 094455b..ac5f044 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -310,6 +310,9 @@ void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
BUG_ON(start & ~HPAGE_MASK);
BUG_ON(end & ~HPAGE_MASK);
+ /* Update high watermark before we lower rss */
+ update_hiwater_rss(mm);
+
for (address = start; address < end; address += HPAGE_SIZE) {
ptep = huge_pte_offset(mm, address);
if (! ptep)
diff --git a/mm/memory.c b/mm/memory.c
index a25ee1d..692ad81 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -820,6 +820,7 @@ unsigned long zap_page_range(struct vm_area_struct *vma, unsigned long address,
lru_add_drain();
spin_lock(&mm->page_table_lock);
tlb = tlb_gather_mmu(mm, 0);
+ update_hiwater_rss(mm);
end = unmap_vmas(&tlb, mm, vma, address, end, &nr_accounted, details);
tlb_finish_mmu(tlb, address, end);
spin_unlock(&mm->page_table_lock);
@@ -2225,22 +2226,6 @@ unsigned long vmalloc_to_pfn(void * vmalloc_addr)
EXPORT_SYMBOL(vmalloc_to_pfn);
-/*
- * update_mem_hiwater
- * - update per process rss and vm high water data
- */
-void update_mem_hiwater(struct task_struct *tsk)
-{
- if (tsk->mm) {
- unsigned long rss = get_mm_rss(tsk->mm);
-
- if (tsk->mm->hiwater_rss < rss)
- tsk->mm->hiwater_rss = rss;
- if (tsk->mm->hiwater_vm < tsk->mm->total_vm)
- tsk->mm->hiwater_vm = tsk->mm->total_vm;
- }
-}
-
#if !defined(__HAVE_ARCH_GATE_AREA)
#if defined(AT_SYSINFO_EHDR)
diff --git a/mm/mmap.c b/mm/mmap.c
index 8a11179..c43b284 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1640,6 +1640,8 @@ find_extend_vma(struct mm_struct * mm, unsigned long addr)
*/
static void remove_vma_list(struct mm_struct *mm, struct vm_area_struct *vma)
{
+ /* Update high watermark before we lower total_vm */
+ update_hiwater_vm(mm);
do {
long nrpages = vma_pages(vma);
@@ -1668,6 +1670,7 @@ static void unmap_region(struct mm_struct *mm,
lru_add_drain();
spin_lock(&mm->page_table_lock);
tlb = tlb_gather_mmu(mm, 0);
+ update_hiwater_rss(mm);
unmap_vmas(&tlb, mm, vma, start, end, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
free_pgtables(&tlb, vma, prev? prev->vm_end: FIRST_USER_ADDRESS,
@@ -1953,6 +1956,7 @@ void exit_mmap(struct mm_struct *mm)
flush_cache_mm(mm);
tlb = tlb_gather_mmu(mm, 1);
+ /* Don't update_hiwater_rss(mm) here, do_exit already did */
/* Use -1 here to ensure all VMAs in the mm are unmapped */
end = unmap_vmas(&tlb, mm, vma, 0, -1, &nr_accounted, NULL);
vm_unacct_memory(nr_accounted);
diff --git a/mm/mremap.c b/mm/mremap.c
index 318eea5..ccf4564 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -167,6 +167,7 @@ static unsigned long move_vma(struct vm_area_struct *vma,
unsigned long new_pgoff;
unsigned long moved_len;
unsigned long excess = 0;
+ unsigned long hiwater_vm;
int split = 0;
/*
@@ -205,9 +206,15 @@ static unsigned long move_vma(struct vm_area_struct *vma,
}
/*
- * if we failed to move page tables we still do total_vm increment
- * since do_munmap() will decrement it by old_len == new_len
+ * If we failed to move page tables we still do total_vm increment
+ * since do_munmap() will decrement it by old_len == new_len.
+ *
+ * Since total_vm is about to be raised artificially high for a
+ * moment, we need to restore high watermark afterwards: if stats
+ * are taken meanwhile, total_vm and hiwater_vm appear too high.
+ * If this were a serious issue, we'd add a flag to do_munmap().
*/
+ hiwater_vm = mm->hiwater_vm;
mm->total_vm += new_len >> PAGE_SHIFT;
vm_stat_account(mm, vma->vm_flags, vma->vm_file, new_len>>PAGE_SHIFT);
@@ -216,6 +223,7 @@ static unsigned long move_vma(struct vm_area_struct *vma,
vm_unacct_memory(excess >> PAGE_SHIFT);
excess = 0;
}
+ mm->hiwater_vm = hiwater_vm;
/* Restore VM_ACCOUNT if one or two pieces of vma left */
if (excess) {
diff --git a/mm/nommu.c b/mm/nommu.c
index 59992488..dfb124f 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -931,6 +931,8 @@ int do_munmap(struct mm_struct *mm, unsigned long addr, size_t len)
realalloc -= kobjsize(vml);
askedalloc -= sizeof(*vml);
kfree(vml);
+
+ update_hiwater_vm(mm);
mm->total_vm -= len >> PAGE_SHIFT;
#ifdef DEBUG
@@ -1078,19 +1080,6 @@ void arch_unmap_area(struct mm_struct *mm, unsigned long addr)
{
}
-void update_mem_hiwater(struct task_struct *tsk)
-{
- unsigned long rss;
-
- if (likely(tsk->mm)) {
- rss = get_mm_rss(tsk->mm);
- if (tsk->mm->hiwater_rss < rss)
- tsk->mm->hiwater_rss = rss;
- if (tsk->mm->hiwater_vm < tsk->mm->total_vm)
- tsk->mm->hiwater_vm = tsk->mm->total_vm;
- }
-}
-
void unmap_mapping_range(struct address_space *mapping,
loff_t const holebegin, loff_t const holelen,
int even_cows)
diff --git a/mm/rmap.c b/mm/rmap.c
index f69d534..4c52c56 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -538,6 +538,9 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma)
if (pte_dirty(pteval))
set_page_dirty(page);
+ /* Update high watermark before we lower rss */
+ update_hiwater_rss(mm);
+
if (PageAnon(page)) {
swp_entry_t entry = { .val = page->private };
/*
@@ -628,6 +631,9 @@ static void try_to_unmap_cluster(unsigned long cursor,
if (!pmd_present(*pmd))
goto out_unlock;
+ /* Update high watermark before we lower rss */
+ update_hiwater_rss(mm);
+
for (original_pte = pte = pte_offset_map(pmd, address);
address < end; pte++, address += PAGE_SIZE) {