* [PATCH] lower VM_DONTCOPY total_vm
@ 2005-07-11 18:14 Hugh Dickins
0 siblings, 0 replies; only message in thread
From: Hugh Dickins @ 2005-07-11 18:14 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel
dup_mmap of a VM_DONTCOPY vma forgot to lower the child's total_vm. (But
no way does this account for the recent report of total_vm seen too low.)
Signed-off-by: Hugh Dickins <hugh@veritas.com>
---
kernel/fork.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletion(-)
--- 2.6.13-rc2-mm1/kernel/fork.c 2005-07-07 12:33:21.000000000 +0100
+++ linux/kernel/fork.c 2005-07-11 18:47:33.000000000 +0100
@@ -210,8 +210,10 @@ static inline int dup_mmap(struct mm_str
struct file *file;
if (mpnt->vm_flags & VM_DONTCOPY) {
+ long pages = vma_pages(mpnt);
+ mm->total_vm -= pages;
__vm_stat_account(mm, mpnt->vm_flags, mpnt->vm_file,
- -vma_pages(mpnt));
+ -pages);
continue;
}
charge = 0;
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2005-07-11 18:14 [PATCH] lower VM_DONTCOPY total_vm Hugh Dickins
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