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From: Thomas Gleixner <tglx@linutronix.de>
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To: Peter Zijlstra <peterz@infradead.org>
Cc: arnd@arndb.de, anna-maria@linutronix.de, frederic@kernel.org,
 peterz@infradead.org, luto@kernel.org, mingo@redhat.com,
 juri.lelli@redhat.com, vincent.guittot@linaro.org,
 dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com,
 mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org,
 oliver.sang@intel.com
Subject: Re: [PATCH v2 4/6] hrtimer: Re-arrange hrtimer_interrupt()
In-Reply-To: <20260121162507.877520597@infradead.org>
References: <20260121162010.647043073@infradead.org>
 <20260121162507.877520597@infradead.org>
Date: Mon, 02 Feb 2026 15:05:14 +0100
Message-ID: <87bji7fdgl.ffs@tglx>
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On Wed, Jan 21 2026 at 17:20, Peter Zijlstra wrote:
> Rework hrtimer_interrupt() such that reprogramming is split out into
> an independent function at the end of the interrupt.
>
> This prepares for reprogramming getting delayed beyond the end of
> hrtimer_interrupt().
>
> Notably, this changes the hang handling to always wait 100ms instead
> of trying to keep it proportional to the actual delay. This simplifies
> the state, also this really shouldn't be happening.

Indeed.

>  /*
> + * Very similar to hrtimer_force_reprogram(), except it deals with
> + * in_hrirq and hang_detected.

in_hrtirq

Reviewed-by: Thomas Gleixner <tglx@kernel.org>