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From: Avi Kivity <avi@qumranet.com>
To: Mike Snitzer <snitzer@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: kexec/kdump of a kvm guest?
Date: Sat, 05 Jul 2008 14:20:12 +0300	[thread overview]
Message-ID: <486F58EC.6020408@qumranet.com> (raw)
In-Reply-To: <170fa0d20806261158me6f81d0p2ea4fa6b7e694a5a@mail.gmail.com>

Mike Snitzer wrote:
> My host is x86_64 RHEL5U1 running 2.6.25.4 with kvm-70 (kvm-intel).
>
> When I configure kdump in the guest (running 2.6.22.19) and force a
> crash (with 'echo c > /proc/sysrq-trigger) kexec boots the kdump
> kernel but then the kernel hangs (before it gets to /sbin/init et al).
>  On the host, the associated qemu is consuming 100% cpu.
>
> I really need to be able to collect vmcores from my kvm guests.  So
> far I can't (on raw hardware all works fine).
>
>   

I've tested this a while ago and it worked (though I tested regular 
kexecs, not crashes); this may be a regression.

Please run kvm_stat to see what's happening at the time of the crash.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.


  reply	other threads:[~2008-07-05 11:20 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-06-26 18:58 kexec/kdump of a kvm guest? Mike Snitzer
2008-07-05 11:20 ` Avi Kivity [this message]
2008-07-24  0:13   ` Mike Snitzer
2008-07-24  8:39     ` Alexander Graf
2008-07-24  8:39       ` Alexander Graf
2008-07-24 11:49       ` Mike Snitzer
2008-07-24 11:49         ` Mike Snitzer
2008-07-24 13:15         ` Vivek Goyal
2008-07-24 13:15           ` Vivek Goyal
2008-07-24 19:03           ` Mike Snitzer
2008-07-24 19:03             ` Mike Snitzer
2008-07-24 19:50             ` Anthony Liguori
2008-07-24 19:50               ` Anthony Liguori
2008-07-25  1:12             ` Vivek Goyal
2008-07-25  1:12               ` Vivek Goyal
2008-07-27  8:32               ` Avi Kivity
2008-07-27  8:32                 ` Avi Kivity
2008-08-25 15:56               ` Mike Snitzer
2008-08-25 15:56                 ` Mike Snitzer
2008-08-25 16:05                 ` Vivek Goyal
2008-08-25 16:05                   ` Vivek Goyal
2008-07-27  9:12             ` Avi Kivity
2008-07-27  9:12               ` Avi Kivity

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