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Subject[PATCH 02/10] sched/core: Clear prev->dl_server in CFS pick fast path
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From: Youssef Esmat <youssefesmat@google.com>

In case the previous pick was a DL server pick, ->dl_server might be
set. Clear it in the fast path as well.

Signed-off-by: Youssef Esmat <youssefesmat@google.com>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
kernel/sched/core.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7f3a2596c1ed..63f41453b79e 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6036,6 +6036,13 @@ __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.
--
2.34.1

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