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Message-ID: <1368114064.7373.109.camel@gandalf.local.home>
Subject: Re: [PATCH 02/11] [BUGFIX] ftrace, kprobes: Fix a deadlock on
 ftrace_regex_lock
From: Steven Rostedt <rostedt@goodmis.org>
To: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: linux-kernel@vger.kernel.org,
        Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        yrl.pp-manager.tt@hitachi.com, Oleg Nesterov <oleg@redhat.com>,
        Ingo Molnar <mingo@redhat.com>, Tom Zanussi <tom.zanussi@intel.com>
Date: Thu, 09 May 2013 11:41:04 -0400
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On Thu, 2013-05-09 at 10:47 -0400, Steven Rostedt wrote:

> > sh-2.05b# echo p vfs_symlink > kprobe_events
> > sh-2.05b# echo vfs_symlink:enable_event:kprobes:p_vfs_symlink_0 > set_ftrace_filter
> > 

> Ouch! I'm surprised I didn't trigger this in my tests. I have lockdep
> enabled, and I did run kprobe testing. I'll have to look at how this was
> missed :-/

OK, now I know why I missed this. My tests never enabled a kprobe event.
I'll have to update them to do so.

Thanks,

-- Steve


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