The following commit has been merged into the sched/core branch of tip: Commit-ID: a741b82423f41501e301eb6f9820b45ca202e877 Gitweb: https://git.kernel.org/tip/a741b82423f41501e301eb6f9820b45ca202e877 Author: Youssef Esmat <youssefesmat@xxxxxxxxxx> AuthorDate: Mon, 27 May 2024 14:06:49 +02:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Mon, 29 Jul 2024 12:22:35 +02:00 sched/core: Clear prev->dl_server in CFS pick fast path In case the previous pick was a DL server pick, ->dl_server might be set. Clear it in the fast path as well. Fixes: 63ba8422f876 ("sched/deadline: Introduce deadline servers") Signed-off-by: Youssef Esmat <youssefesmat@xxxxxxxxxx> Signed-off-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Tested-by: Juri Lelli <juri.lelli@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Link: https://lore.kernel.org/r/7f7381ccba09efcb4a1c1ff808ed58385eccc222.1716811044.git.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 e61da3b..1074ae8 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5840,6 +5840,13 @@ __pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf) } /* + * 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. */
