sched_ext: Pass locked CPU parameter to scx_hardlockup() and add docs

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With the buddy lockup detector, smp_processor_id() returns the detecting CPU,
not the locked CPU, making scx_hardlockup()'s printouts confusing. Pass the
locked CPU number from watchdog_hardlockup_check() as a parameter instead.

Also add kerneldoc comments to handle_lockup(), scx_hardlockup(), and
scx_rcu_cpu_stall() documenting their return value semantics.

Suggested-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Andrea Righi <arighi@nvidia.com>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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This commit is contained in:

Tejun Heo 2025-11-13 15:33:41 -10:00

parent 67932f6918

commit 1dcb98bbb7

3 changed files with 25 additions and 6 deletions

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4

include/linux/sched/ext.h

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25

kernel/sched/ext.c

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2

kernel/watchdog.c

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