Messages in this thread | | | Date | Wed, 20 Aug 2008 09:12:54 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: ftrace introduces instability into kernel 2.6.27(-rc2,-rc3) |
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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 > > > > > > > > > > > > >
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