hrtimer: Avoid re-evaluation when nothing changed

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Most times there is no change between hrtimer_interrupt() deferring the rearm
and the invocation of hrtimer_rearm_deferred(). In those cases it's a pointless
exercise to re-evaluate the next expiring timer.

Cache the required data and use it if nothing changed.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260224163431.338569372@kernel.org

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Thomas Gleixner 2026-02-24 17:38:23 +01:00 • committed by Peter Zijlstra

parent 15dd3a9488

commit b95c4442b0

2 changed files with 58 additions and 40 deletions

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53

include/linux/hrtimer_defs.h

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45

kernel/time/hrtimer.c

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