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

[Mel Gorman]

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!

-- 
Mel Gorman
SUSE Labs
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