From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756797AbZBDPJj (ORCPT ); Wed, 4 Feb 2009 10:09:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756151AbZBDPIo (ORCPT ); Wed, 4 Feb 2009 10:08:44 -0500 Received: from rtsoft3.corbina.net ([85.21.88.6]:60220 "EHLO buildserver.ru.mvista.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754337AbZBDPIm (ORCPT ); Wed, 4 Feb 2009 10:08:42 -0500 Date: Wed, 4 Feb 2009 18:08:40 +0300 From: Anton Vorontsov To: Steven Rostedt , Ingo Molnar Cc: Paul Mackerras , Benjamin Herrenschmidt , linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org Subject: [PATCH 3/3] tracing: Tracers that use CALLER_ADDR macros should select FRAME_POINTER Message-ID: <20090204150840.GC30027@oksana.dev.rtsoft.ru> References: <20090204150755.GA24163@oksana.dev.rtsoft.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Disposition: inline In-Reply-To: <20090204150755.GA24163@oksana.dev.rtsoft.ru> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Irqsoff, switch and preempt tracers use CALLER_ADDR macros, so they should select FRAME_POINTER. Otherwise traces are meaningless. Signed-off-by: Anton Vorontsov --- kernel/trace/Kconfig | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index e2a4ff6..48f7a37 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -86,6 +86,7 @@ config IRQSOFF_TRACER select TRACE_IRQFLAGS select TRACING select TRACER_MAX_TRACE + select FRAME_POINTER help This option measures the time spent in irqs-off critical sections, with microsecond accuracy. @@ -108,6 +109,7 @@ config PREEMPT_TRACER depends on DEBUG_KERNEL select TRACING select TRACER_MAX_TRACE + select FRAME_POINTER help This option measures the time spent in preemption off critical sections, with microsecond accuracy. @@ -136,6 +138,7 @@ config SCHED_TRACER select TRACING select CONTEXT_SWITCH_TRACER select TRACER_MAX_TRACE + select FRAME_POINTER help This tracer tracks the latency of the highest priority task to be scheduled in, starting from the point it has woken up. -- 1.5.6.5