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From: Peter Lieven <pl@dlh.net>
To: kvm@vger.kernel.org, qemu-devel@nongnu.org
Subject: Qemu-KVM 0.12.3 and Multipath -> Assertion
Date: Mon, 03 May 2010 23:26:44 +0200	[thread overview]
Message-ID: <4BDF3F94.1080608@dlh.net> (raw)

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.

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

Thanks,
Peter



WARNING: multiple messages have this Message-ID (diff)
From: Peter Lieven <pl@dlh.net>
To: kvm@vger.kernel.org, qemu-devel@nongnu.org
Subject: [Qemu-devel] Qemu-KVM 0.12.3 and Multipath -> Assertion
Date: Mon, 03 May 2010 23:26:44 +0200	[thread overview]
Message-ID: <4BDF3F94.1080608@dlh.net> (raw)

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.

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

Thanks,
Peter

             reply	other threads:[~2010-05-03 21:53 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-03 21:26 Peter Lieven [this message]
2010-05-03 21:26 ` [Qemu-devel] Qemu-KVM 0.12.3 and Multipath -> Assertion Peter Lieven
2010-05-04  5:38 ` André Weidemann
2010-05-04  5:38   ` [Qemu-devel] " André Weidemann
2010-05-04  8:35 ` [Qemu-devel] " Kevin Wolf
2010-05-04  8:35   ` Kevin Wolf
2010-05-04 11:38   ` Peter Lieven
2010-05-04 11:38     ` Peter Lieven
2010-05-04 12:20     ` Kevin Wolf
2010-05-04 12:20       ` Kevin Wolf
2010-05-04 13:42       ` Peter Lieven
2010-05-04 13:42         ` Peter Lieven
2010-05-04 14:01         ` Kevin Wolf
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
2010-05-18 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-kvm hangs if multipath device is queing Kevin Wolf
2010-05-14  9:26               ` [Qemu-devel] " Kevin Wolf
2010-05-18 11:10               ` Peter Lieven
2010-05-18 11:10                 ` [Qemu-devel] " Peter Lieven
2010-05-18 13:22                 ` Kevin Wolf
2010-05-18 13:22                   ` [Qemu-devel] " Kevin Wolf
2010-05-19  7:29                   ` Christoph Hellwig
2010-05-19  7:29                     ` [Qemu-devel] " Christoph Hellwig
2010-05-19  7:48                     ` Kevin Wolf
2010-05-19  7:48                       ` [Qemu-devel] " Kevin Wolf
2010-05-19  8:18                       ` Peter Lieven
2010-05-19  8:18                         ` [Qemu-devel] " 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
2010-05-08  9:53         ` André Weidemann

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