linux-kernel - Re: Unnecessary mass OOM kills on Linux 3.11 virtualization host

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Message-ID: <20131028182309.GA21822@alpha.arachsys.com>
Date:	Mon, 28 Oct 2013 18:23:09 +0000
From:	Richard Davies <richard@...chsys.com>
To:	Dave Hansen <dave.hansen@...el.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: Unnecessary mass OOM kills on Linux 3.11 virtualization host

Dave Hansen wrote:
> Richard Davies wrote:
> > I further attach some other types of memory manager errors found in the
> > kernel logs around the same time. There are several occurrences of each, but
> > I have only copied one here for brevity:
> >
> > 19:18:27 kernel: BUG: Bad page map in process qemu-system-x86  pte:00000608 pmd:1d57fd067
>
> FWIW, I took a quick look through your OOM report and didn't see any
> obvious causes for it.  But, INMHO, you should probably ignore the OOM
> issue until you've fixed these "Bad page map" problems.   Those are a
> sign of a much deeper problem.

Thanks! What investigation should I do for these? It is on stock 3.11.3.

Richard.
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