linux-kernel - Re: [PATCH 0/2] ftrace: fixes for PPC

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Message-ID: <20081016181452.GA29739@yoda.jdub.homelinux.org>
Date:	Thu, 16 Oct 2008 14:14:52 -0400
From:	Josh Boyer <jwboyer@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Miller <davem@...emloft.net>,
	linuxppc-dev@...abs.org, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 0/2] ftrace: fixes for PPC

On Sat, Sep 06, 2008 at 02:03:47PM +0200, Ingo Molnar wrote:
>
>* Steven Rostedt <rostedt@...dmis.org> wrote:
>
>> I spent the day chasing a bug that would hang PPC on boot up when 
>> ftrace is configured in. I found that it was simply a stupid bug I did 
>> to handle the non MCOUNT_RECORD case. Since I was testing only on x86, 
>> and the MCOUNT_RECORD is automatically set for dynamic ftrace if it is 
>> available, I did not test the case where MCOUNT_RECORD was not set.
>> 
>> I have not finished porting MCOUNT_RECORD to PPC, but have found that 
>> it has caused some issues for archs that do not support it yet.
>> 
>> This patch series handles these cases.
>
>applied to tip/tracing/ftrace, thanks Steve.

Are these two merged yet?  I just spent the better part of the morning
trying to figure out why various Fedora kernels based on 2.6.27-rcX and
2.6.27 final hung on my G5 and finally got one booting with FTRACE
disabled.

josh
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