linux-kernel - Re: [PATCH 00/10] timers/cpuidle: Fixes and cleanups

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Message-ID: <20230815161043.GL212435@hirez.programming.kicks-ass.net>
Date:   Tue, 15 Aug 2023 18:10:43 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Frederic Weisbecker <frederic@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Anna-Maria Behnsen <anna-maria@...utronix.de>
Subject: Re: [PATCH 00/10] timers/cpuidle: Fixes and cleanups

On Fri, Aug 11, 2023 at 07:00:39PM +0200, Frederic Weisbecker wrote:
> Hi,
> 
> The first part of the series is cpuidle callback fixes against timers,
> some of which haven't been Signed by Peter yet.
> 
> Another part is removing the overhead of useless TIF_NR_POLLING clearing.

So I've again forgotten why we don't simply set TIF_NEED_RESCHED if we
need the timer re-programmed. That is by far the simplest fix.

I'm sure we talked about it, but this was a long time ago and I can't
remember :/

Anyway, the patches look good, except I think there's a whole bunch of
architectures that still need fixing. In particular since loongson
'borrowed' the whole lot from MIPS, they need an identical fix. But I'm
sure there's more architectures affected.