linux-kernel - Re: [PATCH] i386 add Intel PEBS and BTS cpufeature bits and detection

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Message-Id: <200611171022.20708.ak@suse.de>
Date:	Fri, 17 Nov 2006 10:22:20 +0100
From:	Andi Kleen <ak@...e.de>
To:	eranian@....hp.com
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	linux-kernel@...r.kernel.org, akpm@...l.org
Subject: Re: [PATCH] i386 add Intel PEBS and BTS cpufeature bits and detection

> The former
> stores from/to information into MSRs and is very small (4 branches). 

P4 since Prescott has 16

> On recent processors LBR and BTS can be constrained by priv level.

Doesn't help for kernel debugging.

-Andi
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