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Subject[PATCH -mmotm-2010-01-06-14-34] Count minor fault in break_ksm
We have counted task's maj/min fault after handle_mm_fault.
break_ksm misses that.

I wanted to check by VM_FAULT_ERROR.
But now break_ksm doesn't handle HWPOISON error.

Signed-off-by: Minchan Kim <minchan.kim@gmail.com>
CC: Hugh Dickins <hugh.dickins@tiscali.co.uk>
CC: Izik Eidus <ieidus@redhat.com>
---
mm/ksm.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/mm/ksm.c b/mm/ksm.c
index 56a0da1..3a1fda4 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -367,9 +367,13 @@ static int break_ksm(struct vm_area_struct *vma, unsigned long addr)
page = follow_page(vma, addr, FOLL_GET);
if (!page)
break;
- if (PageKsm(page))
+ if (PageKsm(page)) {
ret = handle_mm_fault(vma->vm_mm, vma, addr,
FAULT_FLAG_WRITE);
+ if (!(ret & (VM_FAULT_SIGBUS | VM_FAULT_OOM)
+ || current->flags & PF_KTHREAD))
+ current->min_flt++;
+ }
else
ret = VM_FAULT_WRITE;
put_page(page);
--
1.5.6.3


--
Kind regards,
Minchan Kim


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