linux-kernel - Re: mm: BUG: Bad page state in process ksmd

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Date:	Thu, 27 Mar 2014 11:31:30 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Hugh Dickins <hughd@...gle.com>
CC:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: mm: BUG: Bad page state in process ksmd

On 03/27/2014 11:21 AM, Hugh Dickins wrote:
> I've thought about this some, and slept on it, but don't yet see
> how it comes about.  I'll have to come back to it later.
>
> Was it a one-off, or do you find it fairly easy to reproduce?
>
> If the latter, it would be interesting to know if it comes from
> recent changes or not.  mm/mlock.c does appear to have been under
> continuous revision for several releases (but barely changed in next).

I can't say it's easy to reproduce but it did happen 5-6 times at this point.

As far as I can tell there were no big changes in trinity for the last week
or so while we were in lsf/mm, and this issue being reproducible makes me
believe it has something to do with recent changes to mm code.


Thanks,
Sasha
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