From: Josh Durgin <josh.durgin@inktank.com>
To: Yann Dupont <Yann.Dupont@univ-nantes.fr>
Cc: ceph-devel <ceph-devel@vger.kernel.org>
Subject: Re: reproductible kernel oops with kernel 3.2 inside kvm
Date: Thu, 17 May 2012 15:21:55 -0700 [thread overview]
Message-ID: <4FB57A03.70309@inktank.com> (raw)
In-Reply-To: <4FA290C1.9080808@univ-nantes.fr>
Hi Yann,
Sorry for the late response.
On 05/03/2012 07:05 AM, Yann Dupont wrote:
> Hello. I'm stress testing ceph since some time now, with quite good
> results. I really like ceph and will probably use in in some
> pre-production services.
>
> Anyway I've seen some bugs.
>
> One of them is instability if the kernel is running inside KVM, leading
> to a very fast (and reproductible) kernel oops. On bare metal this
> particular oops doesn't happen.
>
> The kernel oops itself involve ceph, but it could be a real bug in kvm too.
>
> The host machine is runnning 3.2.2
> kvm is quite ancien (0.14)
> guest OS is ubuntu 12.04 with his standard kernel. Retried with custom
> 3.2 kernel with the same problem.
I'm not sure how many people are using the kernel client within kvm,
but I haven't seen this problem before. Since it's in d_prune, it's
probably Ceph related, but perhaps kvm makes a race condition trigger
more often in your environment.
I filed http://tracker.newdream.net/issues/2444 to track this.
next prev parent reply other threads:[~2012-05-17 22:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-03 14:05 reproductible kernel oops with kernel 3.2 inside kvm Yann Dupont
2012-05-17 22:21 ` Josh Durgin [this message]
2012-05-21 12:24 ` Yann Dupont
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