From: Frederic Weisbecker <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Cc: Alessio Igor Bogani <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Avi Kivity <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Daniel Lezcano <[email protected]>
Cc: Geoff Levand <[email protected]>
Cc: Gilad Ben Yossef <[email protected]>
Cc: Hakan Akkan <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Kevin Hilman <[email protected]>
Cc: Max Krasnyansky <[email protected]>
Cc: Paul E. McKenney <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Sven-Thorsten Dietrich <[email protected]>
Cc: Thomas Gleixner <[email protected]>
---
kernel/sched/core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index bebea17..783d5e4 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1309,6 +1309,12 @@ ttwu_do_wakeup(struct rq *rq, struct task_struct *p, int
wake_flags)
if (p->sched_class->task_woken)
p->sched_class->task_woken(rq, p);
+ /*
+ * For adaptive nohz case: We called ttwu_activate()
+ * which just updated the rq clock. There is an
+ * exception with p->on_rq != 0 but in this case
+ * we are not idle and rq->idle_stamp == 0
+ */
if (rq->idle_stamp) {
u64 delta = rq->clock - rq->idle_stamp;
u64 max = 2*sysctl_sched_migration_cost;
--
1.7.10.4
--
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