sched: Select_task_rq_fair() must honour SD_LOAD_BALANCE

commit e4f4288842ee12747e10c354d72be7d424c0b627 upstream.

We should skip !SD_LOAD_BALANCE domains.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20091216170517.653578430@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 5488a5d3bc0ed439ea81b3cfed2fb5e54c05790e..199228b24bbc1b4641d9f2289543ddb9e57344ae 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1374,6 +1374,9 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flag
 
        rcu_read_lock();
        for_each_domain(cpu, tmp) {
+               if (!(tmp->flags & SD_LOAD_BALANCE))
+                       continue;
+
                /*
                 * If power savings logic is enabled for a domain, see if we
                 * are not overloaded, if so, don't balance wider.