From: Peter Zijlstra <peterz@infradead.org> mainline inclusion from mainline-v6.12-rc1 commit 260598f142c34811d226fdde5ab0346b48181439 category: feature bugzilla: https://atomgit.com/openeuler/kernel/issues/8335 Reference: https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commi... -------------------------------- With the goal of pushing put_prev_task() after pick_task() / into pick_next_task(). Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20240813224015.943143811@infradead.org Conflicts: kernel/sched/core.c [In function prev_balance(), the mainline patch does not contain the "put_prev_task(rq, prev);", so just remove it.] Signed-off-by: Zicheng Qu <quzicheng@huawei.com> Signed-off-by: cheliequan <cheliequan@inspur.com> Signed-off-by: Luo Gengkun <luogengkun2@huawei.com> --- kernel/sched/core.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 04626decd730..e95934b083a4 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5886,8 +5886,8 @@ static inline void schedule_debug(struct task_struct *prev, bool preempt) schedstat_inc(this_rq()->sched_count); } -static void put_prev_task_balance(struct rq *rq, struct task_struct *prev, - struct rq_flags *rf) +static void prev_balance(struct rq *rq, struct task_struct *prev, + struct rq_flags *rf) { const struct sched_class *start_class = prev->sched_class; const struct sched_class *class; @@ -5915,7 +5915,6 @@ static void put_prev_task_balance(struct rq *rq, struct task_struct *prev, break; } - put_prev_task(rq, prev); } /* @@ -5953,7 +5952,8 @@ __pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf) } restart: - put_prev_task_balance(rq, prev, rf); + prev_balance(rq, prev, rf); + put_prev_task(rq, prev); for_each_active_class(class) { p = class->pick_next_task(rq); @@ -6058,7 +6058,8 @@ pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf) goto out; } - put_prev_task_balance(rq, prev, rf); + prev_balance(rq, prev, rf); + put_prev_task(rq, prev); smt_mask = cpu_smt_mask(cpu); need_sync = !!rq->core->core_cookie; -- 2.34.1