linux-kernel - Re: [PATCH V2] x86/apic: Stop the TSC Deadline timer during lapic timer shutdown

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Message-ID: <CAJZ5v0h0=cyvOw6a6nvgigS-71Q2W3pcZOsGyLRhvMucRubvxA@mail.gmail.com>
Date: Wed, 9 Oct 2024 19:20:42 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc: Zhang Rui <rui.zhang@...el.com>, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, 
	dave.hansen@...ux.intel.com, rafael.j.wysocki@...el.com, x86@...nel.org, 
	linux-pm@...r.kernel.org, hpa@...or.com, peterz@...radead.org, 
	thorsten.blum@...lux.com, yuntao.wang@...ux.dev, tony.luck@...el.com, 
	len.brown@...el.com, srinivas.pandruvada@...el.com, 
	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH V2] x86/apic: Stop the TSC Deadline timer during lapic
 timer shutdown

On Wed, Oct 9, 2024 at 6:28 PM Ricardo Neri
<ricardo.neri-calderon@...ux.intel.com> wrote:
>
> On Wed, Oct 09, 2024 at 03:20:01PM +0800, Zhang Rui wrote:
> > This 12-year-old bug prevents some modern processors from achieving
> > maximum power savings during suspend. For example, Lunar Lake systems
>
> Two nits:
>
> > gets 0% package C-states during suspend to idle and this causes energy
> > star compliance tests to fail.
>
> s/gets/get/
> s/energy start/Energy Star/

Thanks for pointing these out!