sched/numa: Reschedule task on preferred NUMA node once selected

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A preferred node is selected based on the node the most NUMA hinting
faults was incurred on. There is no guarantee that the task is running
on that node at the time so this patch rescheules the task to run on
the most idle CPU of the selected node when selected. This avoids
waiting for the balancer to make a decision.

Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1381141781-10992-25-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Mel Gorman 2013-10-07 11:29:02 +01:00 • committed by Ingo Molnar

parent 7a0f308337

commit e6628d5b0a

3 changed files with 65 additions and 1 deletions

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19

kernel/sched/core.c

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46

kernel/sched/fair.c

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1

kernel/sched/sched.h

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