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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>
This commit is contained in:
Srikar Dronamraju 2015-06-16 17:26:00 +05:30 committed by Ingo Molnar
parent 2a1ed24ce9
commit 44dcb04f0e
1 changed files with 3 additions and 2 deletions
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5
kernel/sched/fair.c
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@ -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;