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| author | Rik van Riel <riel@redhat.com> | 2015-05-15 04:59:36 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-05-19 08:39:19 +0200 |
| commit | c1ceac6276e4ee12e4129afd380db10fae0db7df (patch) | |
| tree | 401ed45d2621e110c5c4699c317224066e6d87ab /Documentation/scheduler/sched-deadline.txt | |
| parent | sched/wait: Introduce TASK_NOLOAD and TASK_IDLE (diff) | |
| download | linux-c1ceac6276e4ee12e4129afd380db10fae0db7df.tar.xz linux-c1ceac6276e4ee12e4129afd380db10fae0db7df.zip | |
sched/numa: Reduce conflict between fbq_classify_rq() and migration
It is possible for fbq_classify_rq() to indicate that a CPU has tasks that
should be moved to another NUMA node, but for migrate_improves_locality
and migrate_degrades_locality to not identify those tasks.
This patch always gives preference to preferred node evaluations, and
only checks the number of faults when evaluating moves between two
non-preferred nodes on a larger NUMA system.
On a two node system, the number of faults is never evaluated. Either
a task is about to be pulled off its preferred node, or migrated onto
it.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: mgorman@suse.de
Link: http://lkml.kernel.org/r/20150514225936.35b91717@annuminas.surriel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/scheduler/sched-deadline.txt')
0 files changed, 0 insertions, 0 deletions