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[PATCH] mm acct accounting fix

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This patch fixes mm->total_vm and mm->locked_vm acctounting in case when
move_page_tables() fails inside move_vma().

Signed-Off-By: Kirill Korotaev <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Kirill Korotaev 2005-05-16 21:53:18 -07:00 • committed by Linus Torvalds
commit 7179906293
1 changed files with 6 additions and 1 deletions
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7
mm/mremap.c
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@ -224,6 +224,12 @@ static unsigned long move_vma(struct vm_area_struct *vma,
split = 1;
}
/*
* if we failed to move page tables we still do total_vm increment
* since do_munmap() will decrement it by old_len == new_len
*/
mm->total_vm += new_len >> PAGE_SHIFT;
if (do_munmap(mm, old_addr, old_len) < 0) {
/* OOM: unable to split vma, just get accounts right */
vm_unacct_memory(excess >> PAGE_SHIFT);
@ -237,7 +243,6 @@ static unsigned long move_vma(struct vm_area_struct *vma,
vma->vm_next->vm_flags |= VM_ACCOUNT;
}
mm->total_vm += new_len >> PAGE_SHIFT;
__vm_stat_account(mm, vma->vm_flags, vma->vm_file, new_len>>PAGE_SHIFT);
if (vm_flags & VM_LOCKED) {
mm->locked_vm += new_len >> PAGE_SHIFT;