From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934609AbYEVJrM (ORCPT ); Thu, 22 May 2008 05:47:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755698AbYEVJq6 (ORCPT ); Thu, 22 May 2008 05:46:58 -0400 Received: from viefep18-int.chello.at ([213.46.255.22]:7388 "EHLO viefep18-int.chello.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751258AbYEVJq6 (ORCPT ); Thu, 22 May 2008 05:46:58 -0400 X-SourceIP: 80.56.237.116 Subject: Re: [PATCH 2/5] ftrace: remove wakeup functions from sched_switch tracer From: Peter Zijlstra To: Steven Rostedt Cc: Ingo Molnar , linux-kernel@vger.kernel.org, pq@iki.fi, proski@gnu.org, sandmann@redhat.com, Steven Rostedt In-Reply-To: <20080522042301.782160037@goodmis.org> References: <20080522042215.584408893@goodmis.org> <20080522042301.782160037@goodmis.org> Content-Type: text/plain Date: Thu, 22 May 2008 11:46:40 +0200 Message-Id: <1211449600.29104.11.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.22.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2008-05-22 at 00:22 -0400, Steven Rostedt wrote: > plain text document attachment (ftrace-remove-wakeup-from-sched.patch) > The added wakeup functions inside the sched_switch tracer dirty the trace > quite a bit. The sched_switch tracer is used to watch context switches. > Adding wakeups to this make the flow of this trace much more complex to > understand. > > Perhaps we can add a way to turn on or off this tracing but for now I'm > reverting the sched_switch back to its original behavior. Not liking this - this is very useful. use grep already.