Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy

[Peter Zijlstra]

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/