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Pass WF_ON_RQ to wakeup_preempt() from ttwu_runnable() so scheduling classes can handle already-runnable wakeups separately. This is a preparatory change to support proxy execution with sched_ext. No functional change. Signed-off-by: Andrea Righi --- kernel/sched/core.c | 2 +- kernel/sched/sched.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index d578dd635f2eb..f142ab455b797 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3908,7 +3908,7 @@ static int ttwu_runnable(struct task_struct *p, int wake_flags) * When on_rq && !on_cpu the task is preempted, see if * it should preempt the task that is current now. */ - wakeup_preempt(rq, p, wake_flags); + wakeup_preempt(rq, p, wake_flags | WF_ON_RQ); } ttwu_do_wakeup(p); return 1; diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 56ac104f1f825..f30d122909e7b 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2538,6 +2538,7 @@ static inline int task_on_rq_migrating(struct task_struct *p) #define WF_MIGRATED 0x20 /* Internal use, task got migrated */ #define WF_CURRENT_CPU 0x40 /* Prefer to move the wakee to the current CPU. */ #define WF_RQ_SELECTED 0x80 /* ->select_task_rq() was called */ +#define WF_ON_RQ 0x100 /* Wakeup of an already runnable task */ static_assert(WF_EXEC == SD_BALANCE_EXEC); static_assert(WF_FORK == SD_BALANCE_FORK); -- 2.55.0