sched: Change position of resched_cpu() in load_balance()

cur_ld_moved is reset if env.flags hit LBF_NEED_BREAK.
So, there is possibility that we miss doing resched_cpu().
Correct it as changing position of resched_cpu()
before checking LBF_NEED_BREAK.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Tested-by: Jason Low <jason.low2@hp.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1366705662-3587-2-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 1c97735..25aaf93 100644 (file)
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5080,17 +5080,17 @@ more_balance:
                double_rq_unlock(env.dst_rq, busiest);
                local_irq_restore(flags);
 
-               if (env.flags & LBF_NEED_BREAK) {
-                       env.flags &= ~LBF_NEED_BREAK;
-                       goto more_balance;
-               }
-
                /*
                 * some other cpu did the load balance for us.
                 */
                if (cur_ld_moved && env.dst_cpu != smp_processor_id())
                        resched_cpu(env.dst_cpu);
 
+               if (env.flags & LBF_NEED_BREAK) {
+                       env.flags &= ~LBF_NEED_BREAK;
+                       goto more_balance;
+               }
+
                /*
                 * Revisit (affine) tasks on src_cpu that couldn't be moved to
                 * us and move them to an alternate dst_cpu in our sched_group