Re: [PATCH 17/18] sched: Retry migration of tasks to CPU on apreferred node

[Peter Zijlstra]

On Wed, Jul 31, 2013 at 11:03:31AM +0100, Mel Gorman wrote:
> On Thu, Jul 25, 2013 at 12:33:52PM +0200, Peter Zijlstra wrote:
> > 
> > Subject: stop_machine: Introduce stop_two_cpus()
> > From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> > Date: Sun Jul 21 12:24:09 CEST 2013
> > 
> > Introduce stop_two_cpus() in order to allow controlled swapping of two
> > tasks. It repurposes the stop_machine() state machine but only stops
> > the two cpus which we can do with on-stack structures and avoid
> > machine wide synchronization issues.
> > 
> > Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> 
> Clever! I did not spot any problems so will be pulling this (and
> presumably the next patch) into the series. Thanks!

You mean aside from the glaring lack of hotplug handling? :-)
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