linux-kernel - Re: [PATCH v9 00/15] arm64: support poll

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Message-ID: <20250121095558.GA20954@willie-the-truck>
Date: Tue, 21 Jan 2025 09:55:58 +0000
From: Will Deacon <will@...nel.org>
To: Ankur Arora <ankur.a.arora@...cle.com>
Cc: linux-pm@...r.kernel.org, kvm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, catalin.marinas@....com,
	tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
	dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
	pbonzini@...hat.com, vkuznets@...hat.com, rafael@...nel.org,
	daniel.lezcano@...aro.org, peterz@...radead.org, arnd@...db.de,
	lenb@...nel.org, mark.rutland@....com, harisokn@...zon.com,
	mtosatti@...hat.com, sudeep.holla@....com, cl@...two.org,
	maz@...nel.org, misono.tomohiro@...itsu.com, maobibo@...ngson.cn,
	zhenglifeng1@...wei.com, joao.m.martins@...cle.com,
	boris.ostrovsky@...cle.com, konrad.wilk@...cle.com
Subject: Re: [PATCH v9 00/15] arm64: support poll_idle()

On Mon, Jan 20, 2025 at 01:13:25PM -0800, Ankur Arora wrote:
> 
> Ankur Arora <ankur.a.arora@...cle.com> writes:
> 
> > This patchset adds support for polling in idle via poll_idle() on
> > arm64.
> >
> > There are two main changes in this version:
> >
> > 1. rework the series to take Catalin Marinas' comments on the semantics
> >    of smp_cond_load_relaxed() (and how earlier versions of this
> >    series were abusing them) into account.
> 
> There was a recent series adding resilient spinlocks which might also have
> use for an smp_cond_load_{acquire,release}_timeout() interface.
> (https://lore.kernel.org/lkml/20250107192202.GA36003@noisy.programming.kicks-ass.net/)

Urgh, that reminds me that I need to go look at that...

Will