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[Bug 1761798] Re: live migration intermittently fails in CI with "VQ 0 s
From: |
Dr. David Alan Gilbert |
Subject: |
[Bug 1761798] Re: live migration intermittently fails in CI with "VQ 0 size 0x80 Guest index 0x12c inconsistent with Host index 0x134: delta 0xfff8" |
Date: |
Tue, 24 Nov 2020 12:17:25 -0000 |
hang on, I've just noticed the :
char device redirected to /dev/pts/2 (label charserial0)
virtio: bogus descriptor or out of resources
2020-11-20 14:25:39.911+0000: initiating migration
I've never seen that 'bogus descriptor or out of resources' one before; the
fact that's happening before the migration starts is suspicious that something
has already gone wrong before migration started.
Is that warning present in all these failures?
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https://bugs.launchpad.net/bugs/1761798
Title:
live migration intermittently fails in CI with "VQ 0 size 0x80 Guest
index 0x12c inconsistent with Host index 0x134: delta 0xfff8"
Status in OpenStack Compute (nova):
Confirmed
Status in QEMU:
New
Bug description:
Seen here:
http://logs.openstack.org/37/522537/20/check/legacy-tempest-dsvm-
multinode-live-
migration/8de6e74/logs/subnode-2/libvirt/qemu/instance-00000002.txt.gz
2018-04-05T21:48:38.205752Z qemu-system-x86_64: -chardev
pty,id=charserial0,logfile=/dev/fdset/1,logappend=on: char device redirected to
/dev/pts/0 (label charserial0)
warning: TCG doesn't support requested feature: CPUID.01H:ECX.vmx [bit 5]
2018-04-05T21:48:43.153268Z qemu-system-x86_64: VQ 0 size 0x80 Guest index
0x12c inconsistent with Host index 0x134: delta 0xfff8
2018-04-05T21:48:43.153288Z qemu-system-x86_64: Failed to load
virtio-blk:virtio
2018-04-05T21:48:43.153292Z qemu-system-x86_64: error while loading state for
instance 0x0 of device '0000:00:04.0/virtio-blk'
2018-04-05T21:48:43.153347Z qemu-system-x86_64: load of migration failed:
Operation not permitted
2018-04-05 21:48:43.198+0000: shutting down, reason=crashed
And in the n-cpu logs on the other host:
http://logs.openstack.org/37/522537/20/check/legacy-tempest-dsvm-
multinode-live-
migration/8de6e74/logs/screen-n-cpu.txt.gz#_Apr_05_21_48_43_257541
There is a related Red Hat bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1450524
The CI job failures are at present using the Pike UCA:
ii libvirt-bin 3.6.0-1ubuntu6.2~cloud0
ii qemu-system-x86 1:2.10+dfsg-0ubuntu3.5~cloud0
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