linux-kernel - Re: [patch 4/9] Remove the TSC synchronization on SMP machines

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Date:	Fri, 2 Feb 2007 08:14:27 +0100
From:	Andi Kleen <ak@...e.de>
To:	Vojtech Pavlik <vojtech@...e.cz>
Cc:	Jiri Bohac <jbohac@...e.cz>, linux-kernel@...r.kernel.org,
	ssouhlal@...ebsd.org, arjan@...radead.org, tglx@...utronix.de,
	johnstul@...ibm.com, zippel@...ux-m68k.org, andrea@...e.de
Subject: Re: [patch 4/9] Remove the TSC synchronization on SMP machines

On Thursday 01 February 2007 16:16, Vojtech Pavlik wrote:

> It might even make sense to desycnhronize the TSCs on such (AMD)
> machines on purpose, so that applications that rely on TSC break
> immediately and not after some time when the error becomes too large.

They won't because they're normally single threaded (and most people
still use single core systems anyways) 

I've threatened to just disable RDTSC for ring 3 before, but it'll likely
never happen because too many programs use it.

-Andi
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