linux-kernel - Re: [mm] BUG: unable to handle kernel paging request at c2446ffc

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Date:	Wed, 3 Dec 2014 10:13:53 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Fengguang Wu <fengguang.wu@...el.com>
Cc:	LKP <lkp@...org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [mm] BUG: unable to handle kernel paging request at c2446ffc

On Mon, Dec 01, 2014 at 09:04:17PM -0800, Fengguang Wu wrote:
> > Hello, Fengguang.
> > 
> > First of all, thanks for reporting!
> > It always helps me a lot.
> > 
> > But, in this time, I can't reproduce this failure with your attached
> 
> Judging from the bisect log, it showed up once per 26 boots, so may
> not be easy to reproduce. The other bisect below looks easier to
> reproduce.
> 
> > configuration. Instead of this failure, sometimes, OOM happens in my
> > testing with your configuration. I don't know why it happens. :)
> 
> Yes, it's not really obvious how the change will be related to this BUG. 
> 
> > Could you have another configuration to trigger this bug?
> 
> Sure. Below is another bisect result.

Hello, Fengguang.

Great! I can reproduce the problem with you another bisect result.
Thanks a lot!
Will send the fix to Andrew.

Thanks.

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