From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner+w=401wt.eu-S1751919AbZH2Nl1@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1751919AbZH2Nl1 (ORCPT <rfc822;w@1wt.eu>);
	Sat, 29 Aug 2009 09:41:27 -0400
Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751627AbZH2Nl1
	(ORCPT <rfc822;linux-kernel-outgoing>);
	Sat, 29 Aug 2009 09:41:27 -0400
Received: from mx3.mail.elte.hu ([157.181.1.138]:44119 "EHLO mx3.mail.elte.hu"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751427AbZH2Nl0 (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Sat, 29 Aug 2009 09:41:26 -0400
Date: Sat, 29 Aug 2009 15:41:07 +0200
From: Ingo Molnar <mingo@elte.hu>
To: "K.Prasad" <prasad@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
       Peter Zijlstra <peterz@infradead.org>,
       LKML <linux-kernel@vger.kernel.org>,
       Lai Jiangshan <laijs@cn.fujitsu.com>,
       Steven Rostedt <rostedt@goodmis.org>,
       Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
       Alan Stern <stern@rowland.harvard.edu>
Subject: Re: [Patch 0/1] HW-BKPT: Allow per-cpu kernel-space Hardware
	Breakpoint requests
Message-ID: <20090829134107.GD24123@elte.hu>
References: <20090817124641.GA13354@in.ibm.com> <20090819161119.GA3633@in.ibm.com> <20090819173259.GF4972@nowhere> <20090820172719.GA16499@in.ibm.com> <20090821142811.GF11098@elte.hu> <20090826033637.GB6245@nowhere> <20090826091642.GB7743@elte.hu> <20090826114954.GA6009@nowhere> <20090826180245.GA4438@in.ibm.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20090826180245.GA4438@in.ibm.com>
User-Agent: Mutt/1.5.18 (2008-05-17)
X-ELTE-SpamScore: -1.5
X-ELTE-SpamLevel: 
X-ELTE-SpamCheck: no
X-ELTE-SpamVersion: ELTE 2.0 
X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5
	-1.5 BAYES_00               BODY: Bayesian spam probability is 0 to 1%
	[score: 0.0000]
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


* K.Prasad <prasad@linux.vnet.ibm.com> wrote:

> I am not sure if pmus can handle, (or want to handle) all the 
> intricacies involved with the hw-breakpoint layer [...]

Which are those intricacies? It's all rather straightforward 
register scheduling and reservation stuff - which perfcounters 
already solves in a very rich way.

	Ingo