From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: 4.8.6-rt5 ftrace function_graph hangs
Date: Mon, 28 Nov 2016 15:33:17 +0100
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Cc: Steven Rostedt <rostedt@goodmis.org>, tglx@linutronix.de,
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To: He Zhe <zhe.he@windriver.com>
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On 2016-11-21 16:30:40 [+0800], He Zhe wrote:
> And I've tried on "a7fac75 Linux 4.8.1" and the latest linux-4.8.y-rt-rebase branch.They have the same issue.

It works here. I tried your config with oldconfig on a x86-64 box. Do
you have a x86-64 config?

> Zhe

Sebastian