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hrtimer: Avoid pointless reprogramming in __hrtimer_start_range_ns()

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[ Upstream commit d19ff16c11 ]

Much like hrtimer_reprogram(), skip programming if the cpu_base is running
the hrtimer interrupt.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Juri Lelli <juri.lelli@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260224163429.069535561@kernel.org
Stable-dep-of: f2e388a019 ("hrtimer: Reduce trace noise in hrtimer_start()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Peter Zijlstra
2026-05-23 13:03:05 +02:00
committed by Greg Kroah-Hartman
parent 16774f7333
commit ece8be21d8
1 changed files with 8 additions and 0 deletions
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kernel/time/hrtimer.c
+8
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@@ -1287,6 +1287,14 @@ static int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
}
first = enqueue_hrtimer(timer, new_base, mode);
/*
* If the hrtimer interrupt is running, then it will reevaluate the
* clock bases and reprogram the clock event device.
*/
if (new_base->cpu_base->in_hrtirq)
return false;
if (!force_local) {
/*
* If the current CPU base is online, then the timer is