[libvirt-users] snapshot create error, unable to find cgroup for vm

[Gao Yongwei]

>
> An ubuntu pastebin for a CentOS issue seems a bit... odd.
> Unfortunately, pastebins tend to expire, so linking to them in mail
> isn't always the most reliable, compared to just pasting relevant
> sections inline.
>
>
> 2013-05-16 04:08:11.063+0000: 21636: debug :
> qemuDomainObjBeginJobInternal:813 : Starting async job: snapshot
> 2013-05-16 04:08:11.103+0000: 21636: debug : virFileClose:72 : Closed fd 23
> 2013-05-16 04:08:11.103+0000: 21636: debug : virCgroupNew:617 : New
> group /libvirt/qemu/testvm
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupDetect:273 :
> Detected mount/mapping 0:cpu at /cgroup/cpu in
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupDetect:273 :
> Detected mount/mapping 1:cpuacct at /cgroup/cpuacct in
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupDetect:273 :
> Detected mount/mapping 2:cpuset at /cgroup/cpuset in
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupDetect:273 :
> Detected mount/mapping 3:memory at /cgroup/memory in
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupDetect:273 :
> Detected mount/mapping 4:devices at /cgroup/devices in
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupDetect:273 :
> Detected mount/mapping 5:freezer at /cgroup/freezer in
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupDetect:273 :
> Detected mount/mapping 6:blkio at /cgroup/blkio in
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupMakeGroup:535 :
> Make group /libvirt/qemu/testvm
> 2013-05-16 04:08:11.105+0000: 21636: debug : virCgroupMakeGroup:560 :
> Make controller /cgroup/cpu/libvirt/qemu/testvm/
> 2013-05-16 04:08:11.106+0000: 21636: error :
> qemuDomainSnapshotCreateDiskActive:11299 : internal error Unable to find
> cgroup for testvm
> 2013-05-16 04:08:11.106+0000: 21636: debug : qemuProcessStartCPUs:2825 :
> Using lock state '(null)'
>
> At this point, all I can say is that our logging for cgroups is LOUSY.
> Can you retry with the just-released 1.0.5.1 or even libvirt.git, as it
> makes no sense trying to debug stale versions unless we can prove the
> problem also affects the latest?  There have been some recent cgroups
> patches.
>
> Thanks. :-)   I'll try 1.0.5.1 later.
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