sched: fix nohz load balancer on cpu offline

[safe/jmp/linux-2.6] / kernel / sched_clock.c

diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index 8178724..a0b0852 100644 (file)
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -118,8 +118,8 @@ static u64 __update_sched_clock(struct sched_clock_data *scd, u64 now)
 
        /*
         * scd->clock = clamp(scd->tick_gtod + delta,
-        *                    max(scd->tick_gtod, scd->clock),
-        *                    max(scd->clock, scd->tick_gtod + TICK_NSEC));
+        *                    max(scd->tick_gtod, scd->clock),
+        *                    scd->tick_gtod + TICK_NSEC);
         */
 
        clock = scd->tick_gtod + delta;
@@ -227,6 +227,9 @@ EXPORT_SYMBOL_GPL(sched_clock_idle_sleep_event);
  */
 void sched_clock_idle_wakeup_event(u64 delta_ns)
 {
+       if (timekeeping_suspended)
+               return;
+
        sched_clock_tick();
        touch_softlockup_watchdog();
 }