cgroup error starting domains

[Matteo Bernardini <matteo.bernardini@xxxxxxxxx>]

Hi,

I've got a small problem using libvirt-1.0.5.1 (with the latest patch in the v1.0.5-maint branch on git added).

I'm using slackware64-14.0 but the situation is exactly the same described on a debian bug

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=707201

When trying to start a domain I got

error: Failed to start domain debian-wheezy-xfce

error: Unable to initialize /machine cgroup: Invalid argument

with this in libvirtd.log

virCgroupDetect:373 : Failed to detect mounts for /machine
qemuInitCgroup:425 : Unable to initialize /machine cgroup: Invalid argument

and the error goes away if I unmount /sys/fs/cgroup.

Reverting to 1.0.4 fixes this, but this exposes another thing that I report even if I'm not sure it's an error: if I create a domain with 1.0.5.1 (I use the latest virt-manager to do this), in the xml of the domain there's a line that doesn't seem to have the close tag

<controller type='pci' index='0' model='pci-root'/>

If I revert to 1.0.4 the domain with this line in the xml doesn't even get listed between the available domains and I got this in libvirtd.log

virDomainControllerDefParseXML:4838 : internal error Unknown controller type 'pci'

deleting the interested line make it available again.

Please let me know if you need further informations on the matters.

Matteo

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