sched_ext: Count kicks denied for lacking baseline cid access

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kick_one_cpu() silently skips a kick when the kicking sub-sched lacks
SCX_CAP_BASE on the target cid, as does kick_one_cpu_if_idle() for idle
kicks. The skips are sound with the same logic as the reenq gate but are
invisible today, unlike the preempt degradation counted in
SCX_EV_SUB_PREEMPT_DENIED. Count them in a new SCX_EV_SUB_KICK_DENIED event
so every cap denial is observable.

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

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Tejun Heo 2026-07-24 09:09:28 -10:00

parent f879519db8

commit 7c80408fa9

2 changed files with 22 additions and 6 deletions

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20

kernel/sched/ext/ext.c

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8

kernel/sched/ext/internal.h

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