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From: Dave Jones <davej@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: FTRACE_WARN_ON((rec->flags & ~FTRACE_FL_MASK) == 0))
Date: Tue, 1 Oct 2013 00:20:25 -0400	[thread overview]
Message-ID: <20131001042025.GA7038@redhat.com> (raw)
In-Reply-To: <1380599766.16752.6.camel@pippen.local.home>

On Mon, Sep 30, 2013 at 11:56:06PM -0400, Steven Rostedt wrote:
 
 > > Steve, any further thoughts on this ? I can't do more than a few hours of fuzz-testing
 > > without eventually running into this.
 > 
 > I'm currently traveling, but as it seems that you have a pretty good
 > reproducer, can trace what trinity does up to the point it crashes?
 > 
 > I think we can do that with other buffers. If you download the latest
 > trace-cmd, you can run:
 > 
 > trace-cmd record -e syscalls -B trinity trinity <args>
 > 
 > This will create a ftrace sub buffer called trinity and shouldn't be
 > affected by the other ftrace functions. Then it should trace all the
 > syscalls that trinity does. I guess a strace could be used too.

It seems like trace-cmd needs to be run as root. all hell will break loose if trinity gets root privs.

	Dave


  reply	other threads:[~2013-10-01  4:20 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-28  3:46 FTRACE_WARN_ON((rec->flags & ~FTRACE_FL_MASK) == 0)) Dave Jones
2013-08-28 13:54 ` Steven Rostedt
2013-08-28 13:58   ` Steven Rostedt
2013-08-28 15:17     ` Steven Rostedt
2013-08-28 18:27       ` Dave Jones
2013-08-28 18:29         ` Dave Jones
2013-08-28 19:27           ` Steven Rostedt
2013-09-30 17:12             ` Dave Jones
2013-10-01  3:56               ` Steven Rostedt
2013-10-01  4:20                 ` Dave Jones [this message]
2013-10-01 12:28                   ` Steven Rostedt
2013-10-02 14:16                     ` Dave Jones
2013-10-02 16:43                       ` Steven Rostedt
2013-10-02 16:53                         ` Dave Jones
2013-08-28 14:31 ` Steven Rostedt
2013-08-28 16:23   ` Dave Jones
2013-08-28 16:50     ` Vince Weaver
2013-08-28 16:57       ` Steven Rostedt
2013-08-28 17:33         ` Dave Jones
  -- strict thread matches above, loose matches on Subject: below --
2014-01-30  4:16 Dave Jones
2014-01-30  4:50 ` Steven Rostedt
2014-01-30  5:32   ` Dave Jones
2014-01-30 13:55     ` Steven Rostedt

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