linux-kernel - Re: process 'stuck' at exit.

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Message-ID: <20131210222150.GB6962@home.goodmis.org>
Date:	Tue, 10 Dec 2013 17:21:50 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Dave Jones <davej@...hat.com>, Oleg Nesterov <oleg@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Darren Hart <dvhart@...ux.intel.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Mel Gorman <mgorman@...e.de>
Subject: Re: process 'stuck' at exit.

On Tue, Dec 10, 2013 at 05:16:21PM -0500, Dave Jones wrote:
> 46.GA6962@...e.goodmis.org>
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> On Tue, Dec 10, 2013 at 05:09:46PM -0500, Steven Rostedt wrote:
>  
>  > So you can do either:
>  > 
>  > trace-cmd record -p function -l get_user_pages_fast --func-stack sleep 5
>  > 
>  > Which will trace the get_user_pages_fast and spit out a full call trace.
> This gives me a 100M trace.dat, but trace show shows..
> 
> # tracer: nop
> #
> # entries-in-buffer/entries-written: 0/0   #P:4
> #
> #                              _-----=> irqs-off
> #                             / _----=> need-resched
> #                            | / _---=> hardirq/softirq
> #                            || / _--=> preempt-depth
> #                            ||| /     delay
> #           TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
> #              | |       |   ||||       |         |
> 
> and that's it.

Oh, if you use trace-cmd record. You need to do trace-cmd report.

The trace-cmd show, shows you what's in the trace file, which was for the
"manual" version.

Sorry for the confusion.

-- Steve

>  
>  > Or if you don't want to use trace-cmd, you can 
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