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Date: Tue, 10 Dec 2013 17:27:51 -0500
From: Dave Jones <davej@redhat.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Oleg Nesterov <oleg@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>, Mel Gorman <mgorman@suse.de>
Subject: Re: process 'stuck' at exit.
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On Tue, Dec 10, 2013 at 05:21:50PM -0500, Steven Rostedt wrote:
 
 > The trace-cmd show, shows you what's in the trace file, which was for the
 > "manual" version.
 > 
 > Sorry for the confusion.

 ah, thanks.

That shows..

version = 6
CPU 0 is empty
CPU 2 is empty
CPU 3 is empty
cpus=4
 trinity-child27-10818 [001] 89790.703544: kernel_stack:         <stack trace>
=> futex_requeue (ffffffff810df18a)
=> do_futex (ffffffff810e019e)
=> SyS_futex (ffffffff810e0de1)
=> tracesys (ffffffff81760be4)
 trinity-child27-10818 [001] 89790.703545: function:             get_user_pages_fast
 trinity-child27-10818 [001] 89790.703547: kernel_stack:         <stack trace>
=> futex_requeue (ffffffff810df18a)
=> do_futex (ffffffff810e019e)
=> SyS_futex (ffffffff810e0de1)
=> tracesys (ffffffff81760be4)
 trinity-child27-10818 [001] 89790.703547: function:             get_user_pages_fast
 trinity-child27-10818 [001] 89790.703549: kernel_stack:         <stack trace>
=> futex_requeue (ffffffff810df18a)
=> do_futex (ffffffff810e019e)
=> SyS_futex (ffffffff810e0de1)
=> tracesys (ffffffff81760be4)
 trinity-child27-10818 [001] 89790.703550: function:             get_user_pages_fast
 trinity-child27-10818 [001] 89790.703552: kernel_stack:         <stack trace>
=> futex_requeue (ffffffff810df18a)
=> do_futex (ffffffff810e019e)
=> SyS_futex (ffffffff810e0de1)
=> tracesys (ffffffff81760be4)


over and over and..

	Dave