From: Stefan Hajnoczi <stefanha@gmail.com>
To: Andrey Korolyov <andrey@xdel.ru>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] qemu process stuck in Rl state
Date: Thu, 18 Sep 2014 11:49:22 +0100 [thread overview]
Message-ID: <20140918104922.GF8847@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <CABYiri-+g33mXtLpHNKPX3Jhvz=y-2LkwyAM2U2-=QLFru=6Xw@mail.gmail.com>
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On Wed, Sep 17, 2014 at 11:56:57PM +0400, Andrey Korolyov wrote:
> I`ve faced an issue with qemu VMs with very large uptime spans - half
> of year or so. They are hanging in running state forever and are not
> killable in any imaginable fashion. Tried to freeze it via freezer cg
> without any luck. VM itself went unresponsive with zero cpu
> consumption after reaching 'forever running' point.
>
> I am going to reset the host in a couple of hours, so any timed ideas
> for debugging this state will be very appreciated.
A couple of shots at figuring out what the process is doing:
cat /proc/$PID/stack
cat /proc/$PID/syscall
gdb $PID
(gdb) thread apply all bt
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next prev parent reply other threads:[~2014-09-18 10:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-17 19:56 [Qemu-devel] qemu process stuck in Rl state Andrey Korolyov
2014-09-18 10:49 ` Stefan Hajnoczi [this message]
2014-09-18 11:21 ` Andrey Korolyov
2014-09-24 8:54 ` Stefan Hajnoczi
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