Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755416AbYHTNNP (ORCPT ); Wed, 20 Aug 2008 09:13:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754350AbYHTNM6 (ORCPT ); Wed, 20 Aug 2008 09:12:58 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.124]:42358 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753243AbYHTNM5 (ORCPT ); Wed, 20 Aug 2008 09:12:57 -0400 Date: Wed, 20 Aug 2008 09:12:54 -0400 (EDT) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: Eran Liberty cc: Steven Rostedt , linux-kernel@vger.kernel.org, Mathieu Desnoyers , "Paul E. McKenney" , linuxppc-dev@ozlabs.org Subject: Re: ftrace introduces instability into kernel 2.6.27(-rc2,-rc3) In-Reply-To: <48ABFD77.6030701@extricom.com> Message-ID: References: <48591941.4070408@extricom.com> <48A92E15.2080709@extricom.com> <48A9901B.1080900@redhat.com> <48A9BEA3.10906@extricom.com> <48AAB7FF.4070502@extricom.com> <48ABFD77.6030701@extricom.com> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1656 Lines: 64 On Wed, 20 Aug 2008, Eran Liberty wrote: > Steven Rostedt wrote: > > On Tue, 19 Aug 2008, Eran Liberty wrote: > > > > > > > Steven Rostedt wrote: > > > > > > > > > > > > Testing tracer sched_switch: PASSED > > > > > Testing tracer ftrace: PASSED > > > > > Testing dynamic ftrace: PASSED > > > > > > > > > Do you have PREEMPT_TRACER enabled, or any other tracer for that matter? > > > > -- Steve > > > I can see stack trace & context trace, but they are derived from other choices > (I can not un select them) Yeah, those are not bad. > > cat .config | grep TRACE > CONFIG_STACKTRACE_SUPPORT=y > CONFIG_HAVE_ARCH_TRACEHOOK=y > # CONFIG_BLK_DEV_IO_TRACE is not set > CONFIG_STACKTRACE=y > # CONFIG_BACKTRACE_SELF_TEST is not set > CONFIG_HAVE_FTRACE=y > CONFIG_HAVE_DYNAMIC_FTRACE=y > CONFIG_FTRACE=y > # CONFIG_SCHED_TRACER is not set > CONFIG_CONTEXT_SWITCH_TRACER=y > CONFIG_DYNAMIC_FTRACE=y > CONFIG_FTRACE_SELFTEST=y > CONFIG_FTRACE_STARTUP_TEST=y You must not have PREEMPT on, so the PREEMPT_TRACER will not show up. The reason I asked, is that my PowerBook runs fine without PREEMPT_TRACER but is very unstable when I have PREEMPT_TRACER enabled. -- Steve > > > > > > > Oops: Exception in kernel mode, sig: 11 [#1] > > > > > Exsw1600 > > > > > Modules linked in: > > > > > NIP: c00bbb20 LR: c00bbb20 CTR: 00000000 > > > > > > > > > > > > > -- 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/