From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753750AbZF2Hyf (ORCPT ); Mon, 29 Jun 2009 03:54:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751680AbZF2HyZ (ORCPT ); Mon, 29 Jun 2009 03:54:25 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:57253 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1757333AbZF2HyT (ORCPT ); Mon, 29 Jun 2009 03:54:19 -0400 Message-ID: <4A48735E.9050002@cn.fujitsu.com> Date: Mon, 29 Jun 2009 15:55:10 +0800 From: Li Zefan User-Agent: Thunderbird 2.0.0.9 (X11/20071115) MIME-Version: 1.0 To: Ingo Molnar CC: Frederic Weisbecker , Steven Rostedt , LKML Subject: [PATCH] tracing/fastboot: document the need of initcall_debug Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To use boot tracer, one should pass initcall_debug as well as ftrace=initcall to the command line. Signed-off-by: Li Zefan --- kernel/trace/Kconfig | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index f7d9a4e..860c712 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -226,13 +226,13 @@ config BOOT_TRACER the timings of the initcalls and traces key events and the identity of tasks that can cause boot delays, such as context-switches. - Its aim is to be parsed by the /scripts/bootgraph.pl tool to + Its aim is to be parsed by the scripts/bootgraph.pl tool to produce pretty graphics about boot inefficiencies, giving a visual representation of the delays during initcalls - but the raw /debug/tracing/trace text output is readable too. - You must pass in ftrace=initcall to the kernel command line - to enable this on bootup. + You must pass in initcall_debug and ftrace=initcall to the kernel + command line to enable this on bootup. config TRACE_BRANCH_PROFILING bool -- 1.5.4.rc3