From: Youssef Esmat <youssefesmat@xxxxxxxxxx>
In case the previous pick was a DL server pick, ->dl_server might be
set. Clear it in the fast path as well.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 63ba8422f876 ("sched/deadline: Introduce deadline servers")
Signed-off-by: Youssef Esmat <youssefesmat@xxxxxxxxxx>
Signed-off-by: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
---
kernel/sched/core.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 08c409457152..6d01863f93ca 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6044,6 +6044,13 @@ __pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf)
p = pick_next_task_idle(rq);
}
+ /*
+ * This is a normal CFS pick, but the previous could be a DL pick.
+ * Clear it as previous is no longer picked.
+ */
+ if (prev->dl_server)
+ prev->dl_server = NULL;
+
/*
* This is the fast path; it cannot be a DL server pick;
* therefore even if @p == @prev, ->dl_server must be NULL.
--
2.45.1
