hrtimer: Select housekeeping CPU during migration

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During CPU-down hotplug, hrtimers may migrate to isolated CPUs,
compromising CPU isolation.

Address this issue by masking valid CPUs for hrtimers using
housekeeping_cpumask(HK_TYPE_TIMER).

Suggested-by: Waiman Long <longman@redhat.com>
Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Waiman Long <longman@redhat.com>
Link: https://lore.kernel.org/r/20240222200856.569036-1-costa.shul@redhat.com

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Costa Shulyupin 2024-02-22 22:08:56 +02:00 • committed by Thomas Gleixner

parent b2cf7507e1

commit 56c2cb1012

1 changed files with 2 additions and 1 deletions

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kernel/time/hrtimer.c

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