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Date: Wed, 7 Mar 2007 18:49:57 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: tglx@linutronix.de, Dan Hecht <dhecht@vmware.com>,
       Zachary Amsden <zach@vmware.com>, akpm@linux-foundation.org, ak@suse.de,
       Virtualization Mailing List <virtualization@lists.osdl.org>,
       Rusty Russell <rusty@rustcorp.com.au>,
       LKML <linux-kernel@vger.kernel.org>, john stultz <johnstul@us.ibm.com>
Subject: Re: + stupid-hack-to-make-mainline-build.patch added to -mm tree
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* Jeremy Fitzhardinge <jeremy@goop.org> wrote:

> Xen, for example, uses the tsc as the principle timebase in the
> hypervisor interface. [...]

ugh. Please take it from me: i've watched the Linux time code walk its 
long, rocky 10+ years road. One of the first mistakes was when we made 
the TSC the center of the i386-time universe. (incidentally, it was me 
who did the first steps of that, as a rookie kernel hacker) We got cured 
out of that in v2.6.19, v2.6.20 and v2.6.21. Granted, Xen is only at the 
beginning of that same road. Meet in another 10 years? ;)

	Ingo