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sched/numa: Simplify task_numa_compare() 

When a task is part of a numa_group, the comparison should always use
the group weight, in order to make workloads converge.

Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: chegu_vinod@hp.com
Cc: mgorman@suse.de
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1403538378-31571-4-git-send-email-riel@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Rik van Riel 2014-06-23 11:46:15 -04:00 committed by Ingo Molnar
parent 6dc1a672ab
commit 1c5d3eb375
1 changed files with 1 additions and 6 deletions
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7
kernel/sched/fair.c
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@ -1154,7 +1154,7 @@ static void task_numa_compare(struct task_numa_env *env,
struct task_group *tg; struct task_group *tg;
long src_load, dst_load; long src_load, dst_load;
long load; long load;
long imp = (groupimp > 0) ? groupimp : taskimp; long imp = env->p->numa_group ? groupimp : taskimp;
rcu_read_lock(); rcu_read_lock();
cur = ACCESS_ONCE(dst_rq->curr); cur = ACCESS_ONCE(dst_rq->curr);
@ -1192,11 +1192,6 @@ static void task_numa_compare(struct task_numa_env *env,
* itself (not part of a group), use the task weight * itself (not part of a group), use the task weight
* instead. * instead.
*/ */
if (env->p->numa_group)
imp = groupimp;
else
imp = taskimp;
if (cur->numa_group) if (cur->numa_group)
imp += group_weight(cur, env->src_nid) - imp += group_weight(cur, env->src_nid) -
group_weight(cur, env->dst_nid); group_weight(cur, env->dst_nid);