linux-kernel - Re: 3.0.1: pagevec_lookup+0x1d/0x30, SLAB issues?

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Date:	Wed, 14 Sep 2011 16:56:15 +0800
From:	Lin Ming <mlin@...pku.edu.cn>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
Cc:	linux-kernel@...r.kernel.org, Alan Piszcz <ap@...arrain.com>,
	"Li, Shaohua" <shaohua.li@...el.com>,
	Andrew Morton <akpm@...gle.com>
Subject: Re: 3.0.1: pagevec_lookup+0x1d/0x30, SLAB issues?

On Mon, Sep 12, 2011 at 6:44 AM, Justin Piszcz <jpiszcz@...idpixels.com> wrote:
>
>
> On Sun, 11 Sep 2011, Justin Piszcz wrote:
>
>> Hi,
>>
>> With 3.0.1 now and all options compiled in and threadirqs removed, I get
>> the same error this user is seeing:
>> http://www.gossamer-threads.com/lists/linux/kernel/1424997
>>
>
> Hello Lin,
>
> I missed your mail (sender IP is in a CIDR blacklist), disabled &
> whitelisted for now:
> http://marc.info/?l=linux-kernel&m=131567477126674&w=2
>
> I've enabled this and I will post a new e-mail / output if it happens
> again with debug enabled for SLAB.
>
> Response to your e-mail:
>
>> Could you tell how to reproduce this?
>
> Running a lot of processes at the same time (memory/cpu+i/o)
>
>> And would you please turn on more debug options to capture more info?
>
> Yup, done now; however, I am using SLAB, not SLUB; so I've enabled:
>
> -> [*] Debug slab memory allocations -> [*]   Memory leak debugging -> [*]
> Debug VM
>
>> CONFIG_SLUB_DEBUG=y
>> CONFIG_SLUB_DEBUG_ON=y
>> CONFIG_DEBUG_VM=y
>
> Please let me know if there are any other options you think would be useful
> to enable or if this should be good, if it recurs again-- as noted above
> I will post an update.

Hi, Justin

There is a similar bug report at:
http://marc.info/?t=131594190600005&r=1&w=2

The attached patch from Shaohua fixed the bug.

Could you have a try it?

Lin Ming

View attachment "filemap-dbg.patch" of type "text/x-patch" (1023 bytes)