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

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Message-ID: <edb18687-9cd7-439e-b526-0eda6585e386@intel.com>
Date: Thu, 10 Oct 2024 17:43:12 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
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

How about something like the completely untested attached patch?

IMNHO, it improves on what was posted here because it draws a parallel
with an AMD erratum and also avoids writes to APIC_TMICT that would get
ignored anyway.
View attachment "deadline1.patch" of type "text/x-patch" (2412 bytes)