linux-kernel - Re: [BUG][PPC64] BUG in 2.6.26.5-rt9 causing Hang

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Message-ID: <20080930044320.GA4685@linux.vnet.ibm.com>
Date:	Tue, 30 Sep 2008 10:13:20 +0530
From:	Chirag Jog <chirag@...ux.vnet.ibm.com>
To:	Gregory Haskins <ghaskins@...ell.com>
Cc:	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>, dvhltc@...ibm.com,
	Dinakar Guniguntala <dino@...ibm.com>
Subject: Re: [BUG][PPC64] BUG in 2.6.26.5-rt9 causing Hang

Hi Gregory,
* Gregory Haskins <ghaskins@...ell.com> [2008-09-29 18:00:01]:

> Gregory Haskins wrote:
> > Gregory Haskins wrote:
> >   
> >> Hi Chirag
> >>
> >> Chirag Jog wrote:
> >>   
> >>     
> >>> Hi Gregory,
> >>> We see the following BUG followed by a hang on the latest kernel 2.6.26.5-rt9 on a Power6 blade (PPC64)
> >>> It is easily recreated by running the async_handler or sbrk_mutex (realtime tests from ltp) tests.
> >>>   
> >>>     
> >>>       
> >> Call me an LTP newbie, but where can I get the sbrk_mutex/async_handler
> >> tests.
> >>     
> > Ok, I figured out this part.  I needed a newer version of the .rpm from
> > a different repo.  However, both async_handler and sbrk_mutex seem to
> > segfault for me.  Hmm
> >   
> 
> Thanks to help from Darren I got around this issue.  Unfortunately both
> tests pass so I cannot reproduce this issue, nor do I see the problem
> via code inspection.  Ill keep digging but I am currently at a loss.  I
> may need to send you some diagnostic patches to find this, if that is ok
> with you Chirag?
This particular bug is not producible on the x86 boxes, i have access
to. Only on ppc64.
Please send the diagnostic patches across. 
I'll try them out! :)

-- 
-Thanks,Chirag
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