linux-kernel - Re: [PATCH v15 10/13] tsc: Upgrade TSC clocksource rating

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Message-ID: <984b7761-acf8-4275-9dcc-ca0539c2d922@amd.com>
Date: Thu, 2 Jan 2025 10:50:53 +0530
From: "Nikunj A. Dadhania" <nikunj@....com>
To: Borislav Petkov <bp@...en8.de>, tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org, thomas.lendacky@....com, x86@...nel.org,
 kvm@...r.kernel.org, mingo@...hat.com, dave.hansen@...ux.intel.com,
 pgonda@...gle.com, seanjc@...gle.com, pbonzini@...hat.com,
 Alexey Makhalov <alexey.makhalov@...adcom.com>,
 Juergen Gross <jgross@...e.com>, Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: Re: [PATCH v15 10/13] tsc: Upgrade TSC clocksource rating

On 12/30/2024 5:06 PM, Borislav Petkov wrote:
> On Tue, Dec 03, 2024 at 02:30:42PM +0530, Nikunj A Dadhania wrote:

> 
>> Upgrade the rating of the early and regular clock source to prefer TSC over
>> other clock sources when TSC is invariant, non-stop and stable.
> 
> I don't think so...

This is what was suggested by tglx: 

"So if you know you want TSC to be selected, then upgrade the rating of
 both the early and the regular TSC clocksource and be done with it."

https://lore.kernel.org/lkml/87setgzvn5.ffs@tglx/

Regards,
Nikunj