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

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Date:	Wed, 18 Feb 2009 19:19:26 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
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


* Steven Rostedt <rostedt@...dmis.org> wrote:

> 
> [ 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.

here's a clickable link:

http://redhat.com/~mingo/misc/config-ftrace-breakage-2009-02-18

	ngo
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