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

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Message-ID: <20241009163344.GA25814@ranerica-svr.sc.intel.com>
Date: Wed, 9 Oct 2024 09:33:44 -0700
From: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To: Zhang Rui <rui.zhang@...el.com>
Cc: 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 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/