linux-kernel - Re: [git pull] ftrace for v2.6.27

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Date:	Wed, 13 Aug 2008 11:11:39 -0400
From:	Steven Rostedt <srostedt@...hat.com>
To:	Bruce Duncan <bwduncan@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: [git pull] ftrace for v2.6.27

Bruce Duncan wrote:
> Hi Ingo, Steven, everyone,
>
> [ Please CC me in replies ]
>
> I have just tracked down a regression in 2.6.27-rc2 wrt 2.6.26. Commit 
> 77a2b37d227483fe52aead242652aee406c25bf0 (ftrace: startup tester on dynamic 
> tracing.) causes my laptop to fail to resume from S3 (it simply reboots about 
> a second after the resume starts and the display never shows anything).
>
> The patch doesn't revert with patch -R (I don't know if there's a cleverer way 
> to ask git to revert it), but the problem goes away if I turn off 
> CONFIG_DYNAMIC_FTRACE.
>
> The commit and bisect log are attached. Please can you help me to debug this?
>
>
>   

I found that I have a box that displays this bug. Without FTRACE it 
suspends and resumes fine. With FTRACE enabled, it does not.

I'll be actively debugging it now. (unfortunately, as with all new 
laptops, I don't have a serial for it).

-- Steve


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