sched_ext: Use schedule_deferred_locked() in schedule_dsq_reenq()

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schedule_dsq_reenq() always uses schedule_deferred() which falls back to
irq_work. However, callers like schedule_reenq_local() already hold the
target rq lock, and scx_bpf_dsq_reenq() may hold it via the ops callback.

Add a locked_rq parameter so schedule_dsq_reenq() can use
schedule_deferred_locked() when the target rq is already held. The locked
variant can use cheaper paths (balance callbacks, wakeup hooks) instead of
always bouncing through irq_work.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>

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Tejun Heo 2026-03-13 09:43:23 -10:00

parent 3229ac4a5e

commit 238eba8c21

1 changed files with 15 additions and 9 deletions

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kernel/sched/ext.c

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