Messages in this thread | | | Date | Thu, 17 Sep 2015 17:53:32 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy |
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On Thu, Sep 17, 2015 at 11:52:45AM -0400, Tejun Heo wrote: > Hello, > > On Thu, Sep 17, 2015 at 05:10:49PM +0200, Peter Zijlstra wrote: > > Subject: sched: Refuse to unplug a CPU if this will violate user task affinity > > > > Its bad policy to allow unplugging a CPU for which a user set explicit > > affinity, either strictly on this CPU or in case this was the last > > online CPU in its mask. > > > > Either would end up forcing the thread on a random other CPU, violating > > the sys_sched_setaffinity() constraint. > > Shouldn't this at least handle suspend differently? Otherwise any > userland task would be able to block suspend.
It does, it will allow suspend.
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