Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752417AbaBZSzR (ORCPT ); Wed, 26 Feb 2014 13:55:17 -0500 Received: from one.firstfloor.org ([193.170.194.197]:55284 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751066AbaBZSzP (ORCPT ); Wed, 26 Feb 2014 13:55:15 -0500 Date: Wed, 26 Feb 2014 19:55:13 +0100 From: Andi Kleen To: Andy Lutomirski Cc: Stephane Eranian , "Yan, Zheng" , LKML , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Andi Kleen Subject: Re: [PATCH v3 00/14] perf, x86: Haswell LBR call stack support Message-ID: <20140226185513.GL22728@two.firstfloor.org> References: <1392703661-15104-1-git-send-email-zheng.z.yan@intel.com> <530D53EF.9090706@amacapital.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > I'm suggesting a perf event option, just like the way that PEBS works. Right now it's a somewhat experimental feature and just having the sysctl is fine. If it turns out that is what everyone uses such an option could be still added later. I suspect most people would still use FP if they can, just use the LBRs if that doesn't work. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/