Hi Eric,
Came across a thread where the kernel stands not to change the
cpuset's behavior during the online-offline-online scenario.
https://lkml.org/lkml/2012/5/4/265
Hope fixing this in Libvirt makes more sense now.
Regards,
Shivaprasad G Bhat
On Sat, Feb 1, 2014 at 8:49 AM, Shivaprasad
Online/Offline operations on the host cpus removes the machine/cpuset.cpus
which are never added back. The guests with vcpu pinning can fail to boot
unless the xml is edited.
If the possibility that the offlined cpus are onlined back, the cpuset.cpus can
be updated upon start of the guest thus
On 01/31/2014 12:22 AM, Shivaprasad G Bhat wrote:
Online/Offline operations on the host cpus removes the machine/cpuset.cpus
which are never added back. The guests with vcpu pinning can fail to boot
unless the xml is edited.
If the possibility that the offlined cpus are onlined back, the
Thanks for the comments Eric.
The offline, removes the entry from the cgroups and all its subcgroups.
On Online, I guess kernel does not know till which sub-cgroup it
should add the entry.
I think that is how cgroup is designed to behave when it lacks the
policy knowledge.
Let me know what you
