[libvirt] [RFC] Support cpu hotplug in libvirt.

[tangchen]

Hi Viktor:

On 07/18/2012 05:06 PM, Viktor Mihajlovski wrote:
> I was actually considering a workaround in libvirt for what I believe to be a 
> kernel misbehavior, however it is possible to deconfigure the cpuset controller 
> in the host (i.e. removing it from /etc/cgconfig.conf). The CPU pinning will 
> still work, only that it using the "legacy" taskset mechanism. All other 
> cgroup-related functionality continues to work as well.
> One issue with monitoring the online state of cpus is that libvirtd might not 
> be running all the time (crash, update) and thus can miss hotplug events.
> 
I don't think remove cpuset controller from cgroup is a good idea.
Maybe other apps will need it.

So I am considering capture the hotplug event (which is uevent) with netlink.
And change the behavior of cgroup in libvirt.
How do you think ?

Thanks. :)

-- 
Best Regards,
Tang chen