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Date: Sat, 5 Jul 2014 03:44:25 -0700 From: tip-bot for Rik van Riel <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, riel@...hat.com, hpa@...or.com, mingo@...nel.org, torvalds@...ux-foundation.org, peterz@...radead.org, tglx@...utronix.de Subject: [tip:sched/core] sched/numa: Use group's max nid as task' s preferred nid Commit-ID: f0b8a4afd6a8c500161e45065a91738b490bf5ae Gitweb: http://git.kernel.org/tip/f0b8a4afd6a8c500161e45065a91738b490bf5ae Author: Rik van Riel <riel@...hat.com> AuthorDate: Mon, 23 Jun 2014 11:41:29 -0400 Committer: Ingo Molnar <mingo@...nel.org> CommitDate: Sat, 5 Jul 2014 11:17:33 +0200 sched/numa: Use group's max nid as task's preferred nid >From task_numa_placement, always try to consolidate the tasks in a group on the group's top nid. In case this task is part of a group that is interleaved over multiple nodes, task_numa_migrate will set the task's preferred nid to the best node it could find for the task, so this patch will cause at most one run through task_numa_migrate. Signed-off-by: Rik van Riel <riel@...hat.com> Cc: mgorman@...e.de Cc: chegu_vinod@...com Cc: Linus Torvalds <torvalds@...ux-foundation.org> Signed-off-by: Peter Zijlstra <peterz@...radead.org> Link: http://lkml.kernel.org/r/1403538095-31256-2-git-send-email-riel@redhat.com Signed-off-by: Ingo Molnar <mingo@...nel.org> --- kernel/sched/fair.c | 17 +---------------- 1 file changed, 1 insertion(+), 16 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index e3ff3d1..96b2d39 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1594,23 +1594,8 @@ static void task_numa_placement(struct task_struct *p) if (p->numa_group) { update_numa_active_node_mask(p->numa_group); - /* - * If the preferred task and group nids are different, - * iterate over the nodes again to find the best place. - */ - if (max_nid != max_group_nid) { - unsigned long weight, max_weight = 0; - - for_each_online_node(nid) { - weight = task_weight(p, nid) + group_weight(p, nid); - if (weight > max_weight) { - max_weight = weight; - max_nid = nid; - } - } - } - spin_unlock_irq(group_lock); + max_nid = max_group_nid; } if (max_faults) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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