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-rw-r--r--include/linux/mm.h5
-rw-r--r--mm/memory.c16
-rw-r--r--mm/mmap.c18
3 files changed, 19 insertions, 20 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 0aeded3a2f7c..7d5c37f24c63 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -896,9 +896,8 @@ int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
unsigned long size);
void zap_page_range(struct vm_area_struct *vma, unsigned long address,
unsigned long size, struct zap_details *);
-void unmap_vmas(struct mmu_gather *tlb,
- struct vm_area_struct *start_vma, unsigned long start_addr,
- unsigned long end_addr, unsigned long *nr_accounted);
+void unmap_vmas(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
+ unsigned long start, unsigned long end);
/**
* mm_walk - callbacks for walk_page_range
diff --git a/mm/memory.c b/mm/memory.c
index f7b6c9859796..1e77da6d82c1 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1295,7 +1295,7 @@ static void unmap_page_range(struct mmu_gather *tlb,
static void unmap_single_vma(struct mmu_gather *tlb,
struct vm_area_struct *vma, unsigned long start_addr,
- unsigned long end_addr, unsigned long *nr_accounted,
+ unsigned long end_addr,
struct zap_details *details)
{
unsigned long start = max(vma->vm_start, start_addr);
@@ -1307,9 +1307,6 @@ static void unmap_single_vma(struct mmu_gather *tlb,
if (end <= vma->vm_start)
return;
- if (vma->vm_flags & VM_ACCOUNT)
- *nr_accounted += (end - start) >> PAGE_SHIFT;
-
if (unlikely(is_pfn_mapping(vma)))
untrack_pfn_vma(vma, 0, 0);
@@ -1339,7 +1336,6 @@ static void unmap_single_vma(struct mmu_gather *tlb,
* @vma: the starting vma
* @start_addr: virtual address at which to start unmapping
* @end_addr: virtual address at which to end unmapping
- * @nr_accounted: Place number of unmapped pages in vm-accountable vma's here
*
* Unmap all pages in the vma list.
*
@@ -1354,13 +1350,13 @@ static void unmap_single_vma(struct mmu_gather *tlb,
*/
void unmap_vmas(struct mmu_gather *tlb,
struct vm_area_struct *vma, unsigned long start_addr,
- unsigned long end_addr, unsigned long *nr_accounted)
+ unsigned long end_addr)
{
struct mm_struct *mm = vma->vm_mm;
mmu_notifier_invalidate_range_start(mm, start_addr, end_addr);
for ( ; vma && vma->vm_start < end_addr; vma = vma->vm_next)
- unmap_single_vma(tlb, vma, start_addr, end_addr, nr_accounted, NULL);
+ unmap_single_vma(tlb, vma, start_addr, end_addr, NULL);
mmu_notifier_invalidate_range_end(mm, start_addr, end_addr);
}
@@ -1379,14 +1375,13 @@ void zap_page_range(struct vm_area_struct *vma, unsigned long start,
struct mm_struct *mm = vma->vm_mm;
struct mmu_gather tlb;
unsigned long end = start + size;
- unsigned long nr_accounted = 0;
lru_add_drain();
tlb_gather_mmu(&tlb, mm, 0);
update_hiwater_rss(mm);
mmu_notifier_invalidate_range_start(mm, start, end);
for ( ; vma && vma->vm_start < end; vma = vma->vm_next)
- unmap_single_vma(&tlb, vma, start, end, &nr_accounted, details);
+ unmap_single_vma(&tlb, vma, start, end, details);
mmu_notifier_invalidate_range_end(mm, start, end);
tlb_finish_mmu(&tlb, start, end);
}
@@ -1406,13 +1401,12 @@ static void zap_page_range_single(struct vm_area_struct *vma, unsigned long addr
struct mm_struct *mm = vma->vm_mm;
struct mmu_gather tlb;
unsigned long end = address + size;
- unsigned long nr_accounted = 0;
lru_add_drain();
tlb_gather_mmu(&tlb, mm, 0);
update_hiwater_rss(mm);
mmu_notifier_invalidate_range_start(mm, address, end);
- unmap_single_vma(&tlb, vma, address, end, &nr_accounted, details);
+ unmap_single_vma(&tlb, vma, address, end, details);
mmu_notifier_invalidate_range_end(mm, address, end);
tlb_finish_mmu(&tlb, address, end);
}
diff --git a/mm/mmap.c b/mm/mmap.c
index 58806106fab6..69a1889f3790 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1889,15 +1889,20 @@ find_extend_vma(struct mm_struct * mm, unsigned long addr)
*/
static void remove_vma_list(struct mm_struct *mm, struct vm_area_struct *vma)
{
+ unsigned long nr_accounted = 0;
+
/* Update high watermark before we lower total_vm */
update_hiwater_vm(mm);
do {
long nrpages = vma_pages(vma);
+ if (vma->vm_flags & VM_ACCOUNT)
+ nr_accounted += nrpages;
mm->total_vm -= nrpages;
vm_stat_account(mm, vma->vm_flags, vma->vm_file, -nrpages);
vma = remove_vma(vma);
} while (vma);
+ vm_unacct_memory(nr_accounted);
validate_mm(mm);
}
@@ -1912,13 +1917,11 @@ static void unmap_region(struct mm_struct *mm,
{
struct vm_area_struct *next = prev? prev->vm_next: mm->mmap;
struct mmu_gather tlb;
- unsigned long nr_accounted = 0;
lru_add_drain();
tlb_gather_mmu(&tlb, mm, 0);
update_hiwater_rss(mm);
- unmap_vmas(&tlb, vma, start, end, &nr_accounted);
- vm_unacct_memory(nr_accounted);
+ unmap_vmas(&tlb, vma, start, end);
free_pgtables(&tlb, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS,
next ? next->vm_start : 0);
tlb_finish_mmu(&tlb, start, end);
@@ -2305,8 +2308,7 @@ void exit_mmap(struct mm_struct *mm)
tlb_gather_mmu(&tlb, mm, 1);
/* update_hiwater_rss(mm) here? but nobody should be looking */
/* Use -1 here to ensure all VMAs in the mm are unmapped */
- unmap_vmas(&tlb, vma, 0, -1, &nr_accounted);
- vm_unacct_memory(nr_accounted);
+ unmap_vmas(&tlb, vma, 0, -1);
free_pgtables(&tlb, vma, FIRST_USER_ADDRESS, 0);
tlb_finish_mmu(&tlb, 0, -1);
@@ -2315,8 +2317,12 @@ void exit_mmap(struct mm_struct *mm)
* Walk the list again, actually closing and freeing it,
* with preemption enabled, without holding any MM locks.
*/
- while (vma)
+ while (vma) {
+ if (vma->vm_flags & VM_ACCOUNT)
+ nr_accounted += vma_pages(vma);
vma = remove_vma(vma);
+ }
+ vm_unacct_memory(nr_accounted);
BUG_ON(mm->nr_ptes > (FIRST_USER_ADDRESS+PMD_SIZE-1)>>PMD_SHIFT);
}