From: "Marcin Gibuła" <m.gibula@beyond.pl>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Unresponsive linux guest once migrated
Date: Wed, 02 Apr 2014 12:18:21 +0200 [thread overview]
Message-ID: <533BE3ED.8070305@beyond.pl> (raw)
In-Reply-To: <20140402093938.GB2586@work-vm>
On 02.04.2014 11:39, Dr. David Alan Gilbert wrote:
> * Marcin Gibu??a (m.gibula@beyond.pl) wrote:
>>> Can you give:
>>> 1) A backtrace from the guest
>>> thread apply all bt full
>>> in gdb
>>
>> You mean from gdb attached to hanged guest? I'll try to get it. From
>> what I remember it looks rather "normal" - busy executing guest
>> code.
>
> yes; if you can send it a sysrq to trigger a backtrace it might also
> be worth a try - I'm just trying to find what the guest is really doing
> when it's apparentyly 'hung'.
IIRC VM doesn't respond to sysrq key sequence. It doesn't respond to
anything actually but NMI. I tried to do inject-nmi. VMs kernel
responded with timestamped message "Uhhuh. NMI received. Dazed and
confused, but trying to continue". That timestamp never changes - its
like time is frozen on VM.
I'll try to find my notes from this gdb session.
--
mg
next prev parent reply other threads:[~2014-04-02 10:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-27 22:52 [Qemu-devel] Unresponsive linux guest once migrated Chris Dunlop
2014-03-27 23:29 ` Marcin Gibuła
2014-03-27 23:59 ` Chris Dunlop
2014-03-31 8:39 ` Marcin Gibuła
2014-04-02 5:41 ` Chris Dunlop
2014-04-02 8:45 ` Marcin Gibuła
2014-04-02 9:04 ` Dr. David Alan Gilbert
2014-04-02 9:30 ` Marcin Gibuła
2014-04-02 9:39 ` Dr. David Alan Gilbert
2014-04-02 10:18 ` Marcin Gibuła [this message]
2014-04-02 17:05 ` Marcin Gibuła
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