Re: Unnecessary mass OOM kills on Linux 3.11 virtualization host

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From: Richard Davies <richard@arachsys.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: Unnecessary mass OOM kills on Linux 3.11 virtualization host
Date: Mon, 28 Oct 2013 18:23:09 +0000	[thread overview]
Message-ID: <20131028182309.GA21822@alpha.arachsys.com> (raw)
In-Reply-To: <526EA947.7060608@intel.com>

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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WARNING: multiple messages have this Message-ID (diff)

From: Richard Davies <richard@arachsys.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Johannes Weiner <hannes@cmpxchg.org>
Subject: Re: Unnecessary mass OOM kills on Linux 3.11 virtualization host
Date: Mon, 28 Oct 2013 18:23:09 +0000	[thread overview]
Message-ID: <20131028182309.GA21822@alpha.arachsys.com> (raw)
In-Reply-To: <526EA947.7060608@intel.com>

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.

next prev parent reply	other threads:[~2013-10-28 18:23 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20131024225718.GA4363@alpha.arachsys.com>
2013-10-24 22:43 ` Unnecessary mass OOM kills on Linux 3.11 virtualization host Richard Davies
2013-10-24 22:43   ` Richard Davies
2013-10-25 10:39   ` Richard Davies
2013-10-25 10:39     ` Richard Davies
2013-10-28  8:28     ` Richard Davies
2013-10-28  8:28       ` Richard Davies
2013-10-28 18:13       ` Dave Hansen
2013-10-28 18:13         ` Dave Hansen
2013-10-28 18:23         ` Richard Davies [this message]
2013-10-28 18:23           ` Richard Davies
2013-11-13 11:18       ` Alin Dobre
2013-11-13 12:09         ` Cyrill Gorcunov
2013-11-13 12:35           ` Alin Dobre
2013-11-13 13:19             ` Cyrill Gorcunov
2013-11-14  9:50               ` Alin Dobre
2013-11-14 10:12                 ` David Rientjes
2013-11-14 10:14                   ` Alin Dobre

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