From: Steven Rostedt <rostedt@goodmis.org>
To: Eran Liberty <liberty@extricom.com>
Cc: Steven Rostedt <srostedt@redhat.com>,
linux-kernel@vger.kernel.org,
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
linuxppc-dev@ozlabs.org
Subject: Re: ftrace introduces instability into kernel 2.6.27(-rc2,-rc3)
Date: Wed, 20 Aug 2008 09:12:54 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.1.10.0808200911100.13132@gandalf.stny.rr.com> (raw)
In-Reply-To: <48ABFD77.6030701@extricom.com>
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
> > > > >
> >
> >
> >
>
>
next prev parent reply other threads:[~2008-08-20 13:13 UTC|newest]
Thread overview: 81+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-18 14:18 2.6.24-rc4: pci_remove_bus_device() => pci_scan_child_bus() => pci_bus_add_devices bug? Eran Liberty
2008-07-20 10:31 ` [PATCH 2.6.24-rc4] PCI: refuse to re-add a device to a bus upon pci_scan_child_bus() Eran Liberty
2008-07-20 16:48 ` Eran Liberty
2008-07-21 19:18 ` [PATCH 2.6.26] " Eran Liberty
2008-07-21 19:49 ` Matthew Wilcox
2008-07-22 8:21 ` eran liberty
2008-07-22 11:49 ` Matthew Wilcox
2008-07-22 13:08 ` Eran Liberty
2008-07-22 13:14 ` Eran Liberty
2008-07-22 14:13 ` Matthew Wilcox
2008-07-22 15:25 ` Eran Liberty
2008-07-22 16:52 ` Matthew Wilcox
2008-07-22 17:41 ` Eran Liberty
2008-07-22 18:11 ` Matthew Wilcox
2008-07-23 18:31 ` Eran Liberty
2008-07-27 11:01 ` Eran Liberty
2008-07-27 15:08 ` Matthew Wilcox
2008-08-18 8:08 ` ftrace introduces instability into kernel 2.6.27(-rc2,-rc3) Eran Liberty
2008-08-18 15:07 ` Steven Rostedt
2008-08-18 15:47 ` Mathieu Desnoyers
2008-08-18 16:12 ` Steven Rostedt
2008-08-18 17:04 ` Mathieu Desnoyers
2008-08-18 17:21 ` Scott Wood
2008-08-18 18:27 ` Steven Rostedt
2008-08-18 18:29 ` Scott Wood
2008-08-19 1:53 ` Benjamin Herrenschmidt
2008-08-19 2:28 ` Steven Rostedt
2008-08-19 2:39 ` Benjamin Herrenschmidt
2008-08-19 2:41 ` Steven Rostedt
2008-08-19 2:47 ` Mathieu Desnoyers
2008-08-19 3:32 ` Steven Rostedt
2008-08-19 3:36 ` Mathieu Desnoyers
2008-08-19 4:00 ` Steven Rostedt
2008-08-19 16:47 ` Steven Rostedt
2008-08-19 17:34 ` Mathieu Desnoyers
2008-08-19 21:08 ` Steven Rostedt
2008-08-20 9:40 ` Nick Piggin
2008-08-19 21:47 ` Benjamin Herrenschmidt
2008-08-19 23:58 ` Jeremy Fitzhardinge
2008-08-20 1:17 ` Benjamin Herrenschmidt
2008-08-19 2:56 ` Benjamin Herrenschmidt
2008-08-19 3:12 ` Steven Rostedt
2008-08-19 4:17 ` Benjamin Herrenschmidt
2008-08-20 7:18 ` Benjamin Herrenschmidt
2008-08-20 13:14 ` Steven Rostedt
2008-08-20 13:19 ` Steven Rostedt
2008-08-20 13:36 ` Eran Liberty
2008-08-20 13:43 ` Steven Rostedt
2008-08-20 14:02 ` Eran Liberty
2008-08-20 14:55 ` Jon Smirl
2008-08-20 15:23 ` Steven Rostedt
2008-08-20 18:23 ` Eran Liberty
2008-08-20 18:33 ` Steven Rostedt
2008-08-20 15:27 ` Steven Rostedt
2008-08-20 21:37 ` Benjamin Herrenschmidt
2008-08-20 14:16 ` Josh Boyer
2008-08-20 14:22 ` Steven Rostedt
2008-08-20 14:50 ` Josh Boyer
2008-09-15 16:30 ` [PATCH 2.6.26] SERIAL DRIVER: Handle Multiple consecutive sysrq from the serial Eran Liberty
2008-09-17 23:46 ` Andrew Morton
2008-09-18 6:58 ` Eran Liberty
2008-08-20 21:36 ` ftrace introduces instability into kernel 2.6.27(-rc2,-rc3) Benjamin Herrenschmidt
2008-08-20 21:44 ` Steven Rostedt
2008-08-18 18:47 ` Steven Rostedt
2008-08-18 18:56 ` Scott Wood
2008-08-18 19:28 ` Steven Rostedt
2008-08-18 18:25 ` Eran Liberty
2008-08-18 18:41 ` Mathieu Desnoyers
2008-08-19 1:54 ` Benjamin Herrenschmidt
2008-08-19 9:56 ` Eran Liberty
2008-08-19 13:02 ` Mathieu Desnoyers
2008-08-19 21:46 ` Benjamin Herrenschmidt
2008-08-18 18:50 ` Steven Rostedt
2008-08-19 12:09 ` Eran Liberty
2008-08-19 13:05 ` Mathieu Desnoyers
2008-08-19 14:21 ` Eran Liberty
2008-08-19 14:42 ` Mathieu Desnoyers
2008-08-19 20:15 ` Steven Rostedt
2008-08-20 11:18 ` Eran Liberty
2008-08-20 13:12 ` Steven Rostedt [this message]
2008-08-19 1:51 ` Benjamin Herrenschmidt
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