Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
sched_ext: Drop spurious warning on kick during scheduler disable
kick_cpus_irq_workfn() warns when scx_kick_syncs is NULL, but this can
legitimately happen when a BPF timer or other kick source races with
free_kick_syncs() during scheduler disable. Drop the pr_warn_once() and
add a comment explaining the race.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Zhao Mengmeng <zhaomengmeng@kylinos.cn>
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kernel/sched/ext.c
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kernel/sched/ext.c
···
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unsigned long *ksyncs;
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s32 cpu;
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-
if (unlikely(!ksyncs_pcpu)) {
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pr_warn_once("kick_cpus_irq_workfn() called with NULL scx_kick_syncs");
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/* can race with free_kick_syncs() during scheduler disable */
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if (unlikely(!ksyncs_pcpu))
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return;
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}
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ksyncs = rcu_dereference_bh(ksyncs_pcpu)->syncs;
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