diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2026-02-24 17:35:37 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-02-27 16:40:04 +0100 |
| commit | d19ff16c11db38f3ee179d72751fb9b340174330 (patch) | |
| tree | 282ad0ef734b1046af59cddc02a1dd81c9b908b9 /kernel | |
| parent | d70c1080a957a5144e6c40e95bcbe04ab542fe05 (diff) | |
hrtimer: Avoid pointless reprogramming in __hrtimer_start_range_ns()
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
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/hrtimer.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 860af7a58428..3088db419aa6 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -1269,6 +1269,14 @@ 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 |