linux-kernel - Re: [PATCH 2/2] perf, x86: Enable PDIR precise instruction profiling on IvyBridge

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Message-ID: <20120613213651.GD32604@tassilo.jf.intel.com>
Date:	Wed, 13 Jun 2012 14:36:51 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Andi Kleen <andi@...stfloor.org>, mingo@...e.hu,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] perf, x86: Enable PDIR precise instruction profiling
 on IvyBridge

> This patch is just wrong on too many levels.. where do you want me to
> start. Lets go with the restriction you mention is lifted, the SDM
> doesn't mention this, 

The SDM is wrong. The restriction is Sandy Bridge only.

>nor does the patch actually lift it.

Why not? It works for me on a Ivy Bridge.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only
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