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| author | Srikar Dronamraju <srikar@linux.vnet.ibm.com> | 2015-06-16 17:26:00 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-07-07 08:46:10 +0200 |
| commit | 44dcb04f0ea8eaac3b9c9d3172416efc5a950214 (patch) | |
| tree | 4ea5f6409e7d76401816fe58b02fce6777467825 /kernel/sched | |
| parent | 2a1ed24ce94036d00a7c5d5e99a77a80f0aa556a (diff) | |
| download | lwn-44dcb04f0ea8eaac3b9c9d3172416efc5a950214.tar.gz lwn-44dcb04f0ea8eaac3b9c9d3172416efc5a950214.zip | |
sched/numa: Consider 'imbalance_pct' when comparing loads in numa_has_capacity()
This is consistent with all other load balancing instances where we
absorb unfairness upto env->imbalance_pct. Absorbing unfairness upto
env->imbalance_pct allows to pull and retain task to their preferred
nodes.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1434455762-30857-3-git-send-email-srikar@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/fair.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 43ee84f05d1e..a53a610095e6 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1415,8 +1415,9 @@ static bool numa_has_capacity(struct task_numa_env *env) * --------------------- vs --------------------- * src->compute_capacity dst->compute_capacity */ - if (src->load * dst->compute_capacity > - dst->load * src->compute_capacity) + if (src->load * dst->compute_capacity * env->imbalance_pct > + + dst->load * src->compute_capacity * 100) return true; return false; |