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From: Kevin Wolf <kwolf@redhat.com>
To: Peter Lieven <pl@dlh.net>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] Qemu-KVM 0.12.3 and Multipath -> Assertion
Date: Tue, 04 May 2010 10:35:16 +0200	[thread overview]
Message-ID: <4BDFDC44.9030808@redhat.com> (raw)
In-Reply-To: <4BDF3F94.1080608@dlh.net>

Am 03.05.2010 23:26, schrieb Peter Lieven:
> Hi Qemu/KVM Devel Team,
> 
> i'm using qemu-kvm 0.12.3 with latest Kernel 2.6.33.3.
> As backend we use open-iSCSI with dm-multipath.
> 
> Multipath is configured to queue i/o if no path is available.
> 
> If we create a failure on all paths, qemu starts to consume 100%
> CPU due to i/o waits which is ok so far.
> 
> 1 odd thing: The Monitor Interface is not responding any more ...
> 
> What es a really blocker is that KVM crashes with:
> kvm: /usr/src/qemu-kvm-0.12.3/hw/ide/internal.h:507: bmdma_active_if: 
> Assertion `bmdma->unit != (uint8_t)-1' failed.
> 
> after the multipath has reestablisched at least one path.

Can you get a stack backtrace with gdb?

> Any ideas? I remember this was working with earlier kernel/kvm/qemu 
> versions.

If it works in the same setup with an older qemu version, bisecting
might help.

Kevin

  parent reply	other threads:[~2010-05-04  8:35 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-03 21:26 [Qemu-devel] Qemu-KVM 0.12.3 and Multipath -> Assertion Peter Lieven
2010-05-04  5:38 ` [Qemu-devel] " André Weidemann
2010-05-04  8:35 ` Kevin Wolf [this message]
2010-05-04 11:38   ` [Qemu-devel] " Peter Lieven
2010-05-04 12:20     ` Kevin Wolf
2010-05-04 13:42       ` Peter Lieven
2010-05-04 14:01         ` Kevin Wolf
2010-05-04 17:07           ` Christoph Hellwig
2010-05-18 11:13             ` Peter Lieven
2010-05-18 12:14               ` Kevin Wolf
2010-05-12 14:01           ` qemu-kvm hangs if multipath device is queing (was: Re: [Qemu-devel] Qemu-KVM 0.12.3 and Multipath -> Assertion) Peter Lieven
2010-05-14  9:26             ` [Qemu-devel] Re: qemu-kvm hangs if multipath device is queing Kevin Wolf
2010-05-18 11:10               ` Peter Lieven
2010-05-18 13:22                 ` Kevin Wolf
2010-05-19  7:29                   ` Christoph Hellwig
2010-05-19  7:48                     ` Kevin Wolf
2010-05-19  8:18                       ` Peter Lieven
2010-05-23 10:30                         ` Peter Lieven
2010-05-08  9:53       ` [Qemu-devel] Qemu-KVM 0.12.3 and Multipath -> Assertion André Weidemann

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