Re: [libvirt] cgroup cpuset limited by default?
On 04/16/2012 05:34 PM, Marc-André Lureau wrote:
Hi,
I noticed recently that my system VMs feel much slower, and that seems
to be because of cpuset cgroup which constrain the VM on the first
cpu. This doesn't happen with session VMs, since they are not ruled by
cgroup. I run f17 with libvirt git, the VMs are created with
virt-manager, using mostly default settings
<vcpu>4</vcpu>
<os>
<type arch='x86_64' machine='pc-0.15'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<clock offset='localtime'/>
Is that intended or is it a bug?
Did you happen to perform a suspend/resume or a hibernation/restore
on your computer? (Or did you do CPU hotplug manually?)
If yes, you might be seeing the problem reported at:
https://bugzilla.redhat.com/show_bug.cgi?id=714271
Unfortunately, as of now the kernel still doesn't handle this
properly.. IOW, we don't have a kernel fix (yet).
Regards,
Srivatsa S. Bhat
IBM Linux Technology Center