oneiric has seen the end of its life and is no longer receiving any
updates. Marking the oneiric task for this ticket as "Won't Fix".
** Changed in: libvirt (Ubuntu Oneiric)
Status: New => Won't Fix
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** Branch linked: lp:ubuntu/qemu-kvm
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https://bugs.launchpad.net/bugs/878422
Title:
CPU hot plug kills the guest
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This bug was fixed in the package qemu-kvm - 0.14.1+noroms-0ubuntu6.1
---
qemu-kvm (0.14.1+noroms-0ubuntu6.1) oneiric-proposed; urgency=low
* debian/qemu-ifdown: don't use full paths for sbin/ifconfig, especially
as those paths are wrong. (LP: #898234)
* debian/patches/dont-t
Verified on oneiric.
(qemu) cpu_set 2 online
cpu hotplug not supported
(qemu) quit
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Title:
CPU hot plug kills the guest
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** Tags removed: verification-needed
** Tags added: verification-done
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Title:
CPU hot plug kills the guest
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Tests fine for me on oneiric, fwiw.
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Title:
CPU hot plug kills the guest
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Martin, I unfortunately cannot test right now as my laptop runs Natty
and I cannot upgrade to Oneiric yet. I'll give that a try as soon as I
switch to Oneiric. If this patch lands in natty-proposed, I'll be happy
to test this immediately.
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Hello Simon, or anyone else affected,
Accepted qemu-kvm into oneiric-proposed, the package will build now and
be available in a few hours. Please test and give feedback here. See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed. Thank you in advance!
** Description changed:
===
SRU Justification:
1. Impact: libvirt-qemu guest crashes
2. Development fix: refuse attempt to hotplug a new cpu
3. Stable fix: same as development fix
4. Test case:
- a. create a vdisk: qemu-img create disk.
** Description changed:
+ ===
+ SRU Justification:
+ 1. Impact: libvirt-qemu guest crashes
+ 2. Development fix: refuse attempt to hotplug a new cpu
+ 3. Stable fix: same as development fix
+ 4. Test case:
+ a. create a vdisk: qemu-img create disk.
** Changed in: libvirt (Ubuntu)
Status: Confirmed => Invalid
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Title:
CPU hot plug kills the guest
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** Tags added: patch
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Title:
CPU hot plug kills the guest
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This bug was fixed in the package qemu-kvm - 0.15.0+noroms-0ubuntu7
---
qemu-kvm (0.15.0+noroms-0ubuntu7) precise; urgency=low
* debian/qemu-ifdown: don't use full paths for sbin/ifconfig, especially
as those paths are wrong. (LP: #898234)
* debian/qemu-kvm.default and debian
Note that with the debdiff above applied to qemu, the virsh setvcpu
command doesn't crash the VM any more, but it doesn't give any
indication of the failure.
** Changed in: libvirt (Ubuntu)
Status: New => Confirmed
** Changed in: libvirt (Ubuntu)
Importance: Undecided => Low
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We are in soft freeze so I can't upload this now, but I've rolled a fix
into the following debdiff.
** Patch added: "proposed debdiff"
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/878422/+attachment/2614860/+files/qemu.debdiff
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This is not a bug in qemu.git upstream because cpu_set does not exist
there. It is however a bug in qemu-kvm.git.
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Title:
CPU hot plug kills the
Ok, sorry, Simon, for taking so long. As it turns out, cpu hotplug is
simply not yet supported. It had been implemented in qemu-kvm, but near
as I can tell it was dropped when it failed to get into qemu.
However, qemu should at least fail more gracefully, or, failing that,
libvirt should be refu
Sergey, here is the steps I've followed :
$ virsh start oneiric
Domain oneiric started
$ virsh setvcpus oneiric --count 2 --live
$ virsh list
Id Name State
--
At this point the guest is dead and I need to start it again :
$ virsh start oneiric
D
Simon, does the guest start normally after that?
I've seen this and had to reboot the host, because 'virsh start' did not
work again ("error: Timed out during operation: cannot acquire state
change lock")
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Thanks for reporting this bug. I can reproduce this even with the
latest oneiric version.
Marking priority low since the host affects the guest (rather than guest
affecting host), and since it can be worked around.
** Changed in: qemu-kvm (Ubuntu)
Importance: Undecided => Low
** Changed in:
Here is the guest definition extracted from "virsh dumpxml oneiric"
** Attachment added: "KVM guest XML definition"
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/878422/+attachment/2561378/+files/oneiric.xml
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B
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Title:
CPU hot plug kills the guest
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