Messages in this thread | | | Date | Thu, 5 Apr 2012 09:11:56 -0700 | From | Tejun Heo <> | Subject | Re: [patch] cgroups: disallow attaching kthreadd |
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On Thu, Apr 05, 2012 at 06:47:11AM +0200, Mike Galbraith wrote: > cgroups: disallow attaching kthreadd > > Allowing kthreadd to be moved to a non-root group makes no sense, it being > a global resource, and needlessly leads unsuspecting users toward trouble. > > 1. An RT workqueue worker thread spawned in a task group with no rt_runtime > allocated is not schedulable. Simple user error, but harmful to the box. > > 2. A worker thread which acquires PF_THREAD_BOUND can never leave a cpuset, > rendering the cpuset immortal. > > Save the user some unexpected trouble, just say no. > > Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
Li, I'm gonna route this through for-3.4-fixes. Can you please ack it?
Thanks.
-- tejun
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