linux-kernel - Re: [PATCH 0/1] arm64: enable PREEMPT

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Message-Id: <174593068821.431779.9112946165910138990.b4-ty@kernel.org>
Date: Tue, 29 Apr 2025 21:27:52 +0100
From: Will Deacon <will@...nel.org>
To: linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-rt-users@...r.kernel.org,
	Valentin Schneider <vschneid@...hat.com>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	Mike Galbraith <efault@....de>,
	Peter Collingbourne <pcc@...gle.com>,
	Mark Rutland <mark.rutland@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>,
	Thiago Jung Bauermann <thiago.bauermann@...aro.org>,
	Mark Brown <broonie@...nel.org>,
	Kristina Martsenko <kristina.martsenko@....com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Petr Tesarik <ptesarik@...e.com>,
	Jinjie Ruan <ruanjinjie@...wei.com>,
	Juri Lelli <juri.lelli@...hat.com>,
	Phil Auld <pauld@...hat.com>
Subject: Re: [PATCH 0/1] arm64: enable PREEMPT_LAZY

On Wed, 05 Mar 2025 11:49:24 +0100, Valentin Schneider wrote:
> Hey folks,
> 
> This is a resubmission of Mark's patch [1]. I didn't end up changing anything
> other than fluffing up the changelog.
> 
> I ran this under an arm64 VM, added some trace_printk's and checked that
> sched_switch's between runnable hackbench threads would occurr in the right
> conditions:
> o with TIF_NEED_RESCHED_LAZY set
>   o at the tick
>   o at do_notify_resume()
> o with TIF_NEED_RESCHED set
> 
> [...]

Applied to arm64 (for-next/entry), thanks!

[1/1] arm64: enable PREEMPT_LAZY
      https://git.kernel.org/arm64/c/c8597e2dd8b6

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev