From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755624Ab0EFHeK (ORCPT ); Thu, 6 May 2010 03:34:10 -0400 Received: from hera.kernel.org ([140.211.167.34]:49605 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752946Ab0EFHeI (ORCPT ); Thu, 6 May 2010 03:34:08 -0400 Message-ID: <4BE270D8.5060507@kernel.org> Date: Thu, 06 May 2010 09:33:44 +0200 From: Tejun Heo User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.1.9) Gecko/20100317 Thunderbird/3.0.4 MIME-Version: 1.0 To: Ingo Molnar CC: Peter Zijlstra , efault@gmx.de, avi@redhat.com, paulus@samba.org, acme@redhat.com, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCHSET] sched,perf: unify tracers in sched and move perf on top of TP References: <1273050400.1642.229.camel@laptop> <4BE13B33.3030709@kernel.org> <1273053073.1642.235.camel@laptop> <4BE1406C.2000400@kernel.org> <1273059488.1642.245.camel@laptop> <4BE1648B.1080709@kernel.org> <20100505165532.GC14323@elte.hu> <1273083173.1642.250.camel@laptop> <20100506063116.GE1172@elte.hu> <1273129464.5605.228.camel@twins> <20100506071153.GA3626@elte.hu> <4BE26FEC.6010706@kernel.org> In-Reply-To: <4BE26FEC.6010706@kernel.org> X-Enigmail-Version: 1.0.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Thu, 06 May 2010 07:33:46 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/06/2010 09:29 AM, Tejun Heo wrote: > (yeah, that can be applied directly to perf calls too but it's > simpler to consolidate, IMHO) Oh, also, if static text optimization is applied to perf calls directly, it would require about the same complexity overhead as doing it on top of TPs. It would still have to drain contexts before turning off those hooks, so the only advantage is the ability to build the kernel w/ PERF but w/o TPs. Thanks. -- tejun