linux-kernel - Re: [PATCH 0/6] [git pull] updates for tip/tracing/ftrace

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Date:	Wed, 18 Feb 2009 12:06:50 -0500 (EST)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	"Luis Claudio R. Goncalves" <lclaudio@...g.org>
Subject: Re: [PATCH 0/6] [git pull] updates for tip/tracing/ftrace


[ Note, I upgrade my email server which caused a bit of havoc, I'm 
 just getting emails back from yesterday ]


On Wed, 18 Feb 2009, Ingo Molnar wrote:

> 
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > it's one of these recent commits:
> > 
> >  fa7c7f6: tracing/core: remove unused parameter in tracing_fill_pipe_page()
> >  6eaaa5d: tracing/core: use appropriate waiting on trace_pipe
> >  35ebf1c: ftrace: show unlimited when traceon or traceoff has no counter
> >  73d8b8b: tracing: fix typing mistake in hint message and comments
> >  d2ef7c2: tracing: fix the return value of trace selftest
> >  af51309: tracing: use the more proper parameter
> >  b6887d7: ftrace: rename _hook to _probe
> >  6a24a24: ftrace: clean up coding style
> > 
> > Have not bisected it any further, excluded them from 
> > tip:master for the time being.
> 
> actually - it's one of these:
> 
> 37bd824: Merge branches 'tracing/ftrace' and 'tracing/urgent' into tracing/core
> 5b058bc: tracing/function-graph-tracer: trace the idle tasks
> 73d3fd9: ftrace: fix !CONFIG_DYNAMIC_FTRACE ftrace_swapper_pid definition
> 97d0bb8: ftrace: fix !CONFIG_FTRACE [un_]register_ftrace_command() prototypes
> f492d3f8: Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
> c4e2b43: Merge branches 'tracing/hw-branch-tracing' and 'tracing/power-tracer' into tracing/core
> e110e3d: ftrace: add pretty print function for traceon and traceoff hooks
> 809dcf2: ftrace: add pretty print to selected fuction traces
> 8fc0c70: ftrace: show selected functions in set_ftrace_filter
> 23b4ff3: ftrace: add traceon traceoff commands to enable/disable the buffers
> 988ae9d: ring-buffer: add tracing_is_on to test if ring buffer is enabled
> 59df055: ftrace: trace different functions with a different tracer
> e6ea44e: ftrace: consolidate mutexes

The above consolidate mutexs would be a prime suspect for a hard lockup.
It may very well be that. When I finally receive your config, I'll give it 
a test. I saw you post the config by looking a web archive, but my email 
server is still in the processes of retrieving all my email from the last 
day or so.

-- Steve
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