linux-kernel - Re: + stupid-hack-to-make-mainline-build.patch added to -mm tree

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Date:	Wed, 7 Mar 2007 18:49:57 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	tglx@...utronix.de, Dan Hecht <dhecht@...are.com>,
	Zachary Amsden <zach@...are.com>, akpm@...ux-foundation.org,
	ak@...e.de,
	Virtualization Mailing List <virtualization@...ts.osdl.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	LKML <linux-kernel@...r.kernel.org>,
	john stultz <johnstul@...ibm.com>
Subject: Re: + stupid-hack-to-make-mainline-build.patch added to -mm tree

* Jeremy Fitzhardinge <jeremy@...p.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
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