Date: Tue, 21 Oct 2008 11:50:03 +0200
From: Pavel Machek <pavel@suse.cz>
To: Alok Kataria <akataria@vmware.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, LKML <linux-kernel@vger.kernel.org>,
       the arch/x86 maintainers <x86@kernel.org>,
       Dan Hecht <dhecht@vmware.com>
Subject: Re: [PATCH 0/3] Improve TSC as a clocksource under VMware
Message-ID: <20081021095002.GA5880@atrey.karlin.mff.cuni.cz>
References: <1224552902.2640.88.camel@alok-dev1>
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> Hi,
> 
> This patch set makes some changes to the TSC code, so that it is always
> used as the default clocksource when running under VMware.
> The first 2 patches do the ground work of adding code to detect if we
> are running under VMware.
> The third patch adds a tsc_reliable flag which tells us that TSC is
> reliable on this system, so that we can skip some tests which can
> potentially mark TSC as unstable. Details under individual patch
> headers. 

How do you _know_ TSC is stable under VMWare? AFAICT, accesses to TSC
are not virtualized and system VMWare runs on may still use frequency
scaling, no?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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