Commit-ID: bb97fc31647539f1f102eed646a95e200160a150 Gitweb: http://git.kernel.org/tip/bb97fc31647539f1f102eed646a95e200160a150 Author: Rik van Riel <[email protected]> AuthorDate: Wed, 4 Jun 2014 16:33:15 -0400 Committer: Ingo Molnar <[email protected]> CommitDate: Wed, 18 Jun 2014 18:29:58 +0200
sched/numa: Always try to migrate to preferred node at task_numa_placement() time It is possible that at task_numa_placement() time, the task's numa_preferred_nid does not change, but the task is not actually running on the preferred node at the time. In that case, we still want to attempt migration to the preferred node. Signed-off-by: Rik van Riel <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Cc: [email protected] Cc: Linus Torvalds <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/sched/fair.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 8fbb011..3fa3e18 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1613,11 +1613,13 @@ static void task_numa_placement(struct task_struct *p) spin_unlock_irq(group_lock); } - /* Preferred node as the node with the most faults */ - if (max_faults && max_nid != p->numa_preferred_nid) { - /* Update the preferred nid and migrate task if possible */ - sched_setnuma(p, max_nid); - numa_migrate_preferred(p); + if (max_faults) { + /* Set the new preferred node */ + if (max_nid != p->numa_preferred_nid) + sched_setnuma(p, max_nid); + + if (task_node(p) != p->numa_preferred_nid) + numa_migrate_preferred(p); } } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
