Date: Tue, 29 Nov 2005 17:15:48 +0100
From: Andi Kleen <ak@suse.de>
To: Ray Bryant <raybry@mpdtxmail.amd.com>
Cc: Andi Kleen <ak@suse.de>, discuss@x86-64.org, linux-kernel@vger.kernel.org,
       perfctr-devel@lists.sourceforge.net
Subject: Re: Enabling RDPMC in user space by default
Message-ID: <20051129161548.GJ19515@wotan.suse.de>
References: <20051129151515.GG19515@wotan.suse.de> <200511291056.32455.raybry@mpdtxmail.amd.com>
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> 
> > It would be actually a good idea to disable RDTSC in ring 3 too
> > (because user space usually doesn't have enough information to make
> > good use of it and gets it wrong), but I fear that will break
> > too many applications right now.
> >
> 
> FWIW, I agree here.   We lock down the power state and still use RDTSC for 
> some timing things.

You should replace that with RDPMC 0 once I did the change IMHO.

-Andi
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