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| author |   Tejun Heo <tj@kernel.org> | 2024-08-06 09:40:10 -1000 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2024-08-06 09:40:10 -1000 |
| commit | cd0144926836b8405966ca9d00f6425ef822fa4b (patch) | |
| tree | 94141b75f78a5a14b5cfda70787f5dddc67688ed | |
| parent | sched_ext: Simplify scx_can_stop_tick() invocation in sched_can_stop_tick() (diff) | |
| download | wireguard-linux-cd0144926836b8405966ca9d00f6425ef822fa4b.tar.xz wireguard-linux-cd0144926836b8405966ca9d00f6425ef822fa4b.zip | |
sched_ext: Add scx_enabled() test to @start_class promotion in put_prev_task_balance()
SCX needs its balance() invoked even when waking up from a lower priority
sched class (idle) and put_prev_task_balance() thus has the logic to promote
@start_class if it's lower than ext_sched_class. This is only needed when
SCX is enabled. Add scx_enabled() test to avoid unnecessary overhead when
SCX is disabled.
Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: David Vernet <void@manifault.com>
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 38df84d5a9f6..957c1a6626d2 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5867,7 +5867,7 @@ static void put_prev_task_balance(struct rq *rq, struct task_struct *prev, * when waking up from SCHED_IDLE. If @start_class is below SCX, start * from SCX instead. */ - if (sched_class_above(&ext_sched_class, start_class)) + if (scx_enabled() && sched_class_above(&ext_sched_class, start_class)) start_class = &ext_sched_class; #endif |