[RESEND][PATCH v31 3/9] sched/core: Avoid migrating blocked_on tasks

Its not useful to migrate blocked_on tasks from other
runqueues as the proxy logic will just migrate it
back to the owner's rq. So skip blocked_on tasks here.

Signed-off-by: John Stultz <[email protected]>
---
Cc: Joel Fernandes <[email protected]>
Cc: Qais Yousef <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Juri Lelli <[email protected]>
Cc: Vincent Guittot <[email protected]>
Cc: Dietmar Eggemann <[email protected]>
Cc: Valentin Schneider <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Ben Segall <[email protected]>
Cc: Zimuzo Ezeozue <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Waiman Long <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: "Paul E. McKenney" <[email protected]>
Cc: Metin Kaya <[email protected]>
Cc: Xuewen Yan <[email protected]>
Cc: K Prateek Nayak <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Daniel Lezcano <[email protected]>
Cc: Suleiman Souhlal <[email protected]>
Cc: Andrea Righi <[email protected]>
Cc: kuyo chang <[email protected]>
Cc: hupu <[email protected]>
Cc: [email protected]
---
 kernel/sched/core.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index e7074ba54a91f..8e661b5f133d7 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6477,6 +6477,9 @@ static bool try_steal_cookie(int this, int that)
 		if (p == src->core_pick || p == src->curr || p == src->donor)
 			goto next;
 
+		if (task_is_blocked(p))
+			goto next;
+
 		if (!is_cpu_allowed(p, this))
 			goto next;
 
-- 
2.55.0.654.g21b8a5bc05-goog