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| author | Mel Gorman <mgorman@suse.de> | 2013-10-07 11:29:01 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-10-09 12:40:27 +0200 |
| commit | 7a0f308337d11fd5caa9f845c6d08cc5d6067988 (patch) | |
| tree | 91203c3f68fcc5d6a63dc7403fe43b1cc0fc3955 /kernel/sched/features.h | |
| parent | 3a7053b3224f4a8b0e8184166190076593621617 (diff) | |
| download | blackbird-op-linux-7a0f308337d11fd5caa9f845c6d08cc5d6067988.tar.gz blackbird-op-linux-7a0f308337d11fd5caa9f845c6d08cc5d6067988.zip | |
sched/numa: Resist moving tasks towards nodes with fewer hinting faults
Just as "sched: Favour moving tasks towards the preferred node" favours
moving tasks towards nodes with a higher number of recorded NUMA hinting
faults, this patch resists moving tasks towards nodes with lower faults.
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/1381141781-10992-24-git-send-email-mgorman@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/features.h')
| -rw-r--r-- | kernel/sched/features.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/sched/features.h b/kernel/sched/features.h index d9278ce2c4b4..5716929a2e3a 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -74,4 +74,12 @@ SCHED_FEAT(NUMA, false) * balancing. */ SCHED_FEAT(NUMA_FAVOUR_HIGHER, true) + +/* + * NUMA_RESIST_LOWER will resist moving tasks towards nodes where a + * lower number of hinting faults have been recorded. As this has + * the potential to prevent a task ever migrating to a new node + * due to CPU overload it is disabled by default. + */ +SCHED_FEAT(NUMA_RESIST_LOWER, false) #endif |
