linux-kernel - Re: OOM killer, page fault

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Date:	Mon, 2 Nov 2009 23:40:43 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Norbert Preining <preining@...ic.at>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>
Subject: Re: OOM killer, page fault

Hi.

On Mon, Nov 2, 2009 at 11:19 PM, Norbert Preining <preining@...ic.at> wrote:
> Hi all,
>
> wow, many messages ... At the end I lost track of which patch I should try?
>
> BTW, that happened only once, and whatever I do I cannot reproduce that.
>
> I will anyway include any patch you send me and hope that it happens again.

Pz forget my previous patch.
Could you test following patch?

diff --git a/mm/memory.c b/mm/memory.c
index 7e91b5f..47e4b15 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2713,7 +2713,11 @@ static int __do_fault(struct mm_struct *mm,
struct vm_area_struct *vma,
       vmf.page = NULL;

       ret = vma->vm_ops->fault(vma, &vmf);
-       if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))
+       if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) {
+               printk(KERN_DEBUG "vma->vm_ops->fault : 0x%lx\n",
vma->vm_ops->fault);
+               WARN_ON(1);
+
+       }
               return ret;

       if (unlikely(PageHWPoison(vmf.page))) {


> Thanks
>
> Norbert
>
> -------------------------------------------------------------------------------
> Dr. Norbert Preining                                        Associate Professor
> JAIST Japan Advanced Institute of Science and Technology   preining@...st.ac.jp
> Vienna University of Technology                               preining@...ic.at
> Debian Developer (Debian TeX Task Force)                    preining@...ian.org
> gpg DSA: 0x09C5B094      fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
> -------------------------------------------------------------------------------
> BAUMBER
> A fitted elasticated bottom sheet which turns your mattress
> bananashaped.
>                        --- Douglas Adams, The Meaning of Liff
>



-- 
Kind regards,
Minchan Kim
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