From: Rik van Riel Date: Mon, 23 Jun 2014 15:46:15 +0000 (-0400) Subject: sched/numa: Simplify task_numa_compare() X-Git-Tag: firefly_0821_release~176^2~3502^2~19 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1c5d3eb3759013bc7ee4197aa0a9f245bdb6eb90;p=firefly-linux-kernel-4.4.55.git 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 Cc: chegu_vinod@hp.com Cc: mgorman@suse.de Cc: Linus Torvalds Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1403538378-31571-4-git-send-email-riel@redhat.com Signed-off-by: Ingo Molnar --- diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index d6526d2cf173..cebb312e874b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1154,7 +1154,7 @@ static void task_numa_compare(struct task_numa_env *env, struct task_group *tg; long src_load, dst_load; long load; - long imp = (groupimp > 0) ? groupimp : taskimp; + long imp = env->p->numa_group ? groupimp : taskimp; rcu_read_lock(); 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 * instead. */ - if (env->p->numa_group) - imp = groupimp; - else - imp = taskimp; - if (cur->numa_group) imp += group_weight(cur, env->src_nid) - group_weight(cur, env->dst_nid);