migration fails with virtio-blk
Apparently there's an issue with migration when virtio-blk is in use at the time migration occurs.
See Debian bug #580649 for details:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=580649
In short: 2.6.26 (guest) + 0.12.3 + virtio-blk fails. 2.6.32 guest works, 0.11 works, non-virtio-blk works.
Debian qemu-kvm is compiled without --enable-iothread - JFYI.
The bugreport contains a backtrace taken from guest.
Now, one can say it's a bug in 2.6.26 kernel, which is quite old. But the problem does not occur with qemu-kvm-0.11, so it might be treated as a regression instead.
Thanks!
/mjt
10.05.2010 13:49, Michael Tokarev пишет:
Quoted 8 lines
Apparently there's an issue with migration when virtio-blk is in use at the time migration occurs.
See Debian bug #580649 for details:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=580649In short: 2.6.26 (guest) + 0.12.3 + virtio-blk fails. 2.6.32 guest works, 0.11 works, non-virtio-blk works.
It looks like a problem reported on qemu-devel
list should fix the issue here:
http://marc.info/?l=qemu-devel&m=127350821419989
Testing... It wont be fast because I want to hear from the OP.
Thanks!
/mjt
Quoted 7 lines · Michael Tokarev
10.05.2010 13:49, Michael Tokarev пишет:
Quoted 6 lines
Apparently there's an issue with migration when virtio-blk is in use at the time migration occurs.
See Debian bug #580649 for details:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=580649
Quoted 6 lines
Quoted 2 lines
In short: 2.6.26 (guest) + 0.12.3 + virtio-blk fails. 2.6.32 guest works, 0.11 works, non-virtio-blk works.
It looks like a problem reported on qemu-devel
list should fix the issue here:
http://marc.info/?l=qemu-devel&m=127350821419989
Can't be, that's a vhost patch and 0.12.3 doesn't support vhost.
Regards,
Anthony Liguori
Quoted 10 lines
Testing... It wont be fast because I want to hear from the OP.
Thanks!
/mjt
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Quoted 9 lines · Anthony Liguori
Quoted 6 lines · Michael Tokarev
Quoted 2 lines
In short: 2.6.26 (guest) + 0.12.3 + virtio-blk fails. 2.6.32 guest works, 0.11 works, non-virtio-blk works.
It looks like a problem reported on qemu-devel
list should fix the issue here:
http://marc.info/?l=qemu-devel&m=127350821419989Can't be, that's a vhost patch and 0.12.3 doesn't support vhost.
Well, that was really close. qemu-kvm-0.12 has the following code in that place:
vdev->features = features;
the patch mentioned has this:
+ if (vdev->set_features)
+ vdev->set_features(vdev, features);
so basically kvm had the same code here,
just not wrapped into a function ;)
And sure thing you're right, it does not help any. :)
Thanks!
/mjt