sched_ext: Check bpf_timer_start return values in scx_qmap

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monitor_timerfn(), lowpri_timerfn() and round_robin_timerfn() ignore
bpf_timer_start()'s return value: a failed re-arm silently stops the
periodic heartbeat, starving every task parked in LOWPRI_DSQ (lowpri)
or freezing cid rotation (round-robin).  Check the returns and raise
scx_bpf_error(), matching the init paths.

Signed-off-by: Wanwu Li <liwanwu@kylinos.cn>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Wanwu Li 2026-08-27 16:07:38 +08:00 • committed by Tejun Heo

parent b6ee92d7f7

commit 84590dbb9f

1 changed files with 6 additions and 3 deletions

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tools/sched_ext/scx_qmap.bpf.c

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