linux-kernel - Re: [PATCH] raise tsc clocksource rating

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Message-ID: <47266A00.4040408@goop.org>
Date:	Mon, 29 Oct 2007 16:17:20 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Zachary Amsden <zach@...are.com>,
	Glauber de Oliveira Costa <gcosta@...hat.com>,
	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	rusty@...tcorp.com.au, Avi Kivity <avi@...ranet.com>,
	kvm-devel@...ts.sourceforge.net,
	Glauber de Oliveira Costa <glauber@....localdomain>,
	Dan Hecht <dhecht@...are.com>,
	Garrett Smith <garrett@...are.com>
Subject: Re: [PATCH] raise tsc clocksource rating

Ingo Molnar wrote:
> that's totally broken then. You cannot create an SMP-safe monotonic 
> clocksource via interpolation - native does not do it either. Good thing 
> this problem got exposed, it needs to be fixed.
>   

Sigh, I don't really want to have this fight again.

I don't really see what point there is in raising the tsc's rating (why
is 300 insufficient again?), but regardless of the value, the Xen
clocksource rating needs to be higher.

    J
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