Message-ID: <4B335964.6040202@klingt.org>
Date: Thu, 24 Dec 2009 13:07:00 +0100
From: Tim Blechmann <tim@klingt.org>
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To: Tejun Heo <tj@kernel.org>
CC: linux-kernel@vger.kernel.org, stern@rowland.harvard.edu, x86@kernel.org
Subject: Re: 2.6.32 regression: unable to handle kernel paging request
References: <4B269765.1070703@klingt.org> <4B2A2A7D.1050506@klingt.org> <4B2A93F2.3070407@klingt.org> <4B2AFBB1.3040609@kernel.org> <4B2B4838.6080509@klingt.org> <4B2F20E0.30804@kernel.org> <4B2F40C0.5020407@klingt.org> <4B33592B.6000107@kernel.org>
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>>>>>> removing module-common.lds from LDFLAGS_MODULE, my machine boots fine
>>>>>> and without any error messages:
>>>>>
>>>>> Looks like some necessary part of module image ends up in discarded
>>>>> sections.  Before the commit, the build process kept those sections so
>>>>> it worked.  The code has been there for some time now and you're the
>>>>> first one to report it, so I suppose your .config is a bit different
>>>>> from more usual ones.  Can you please attach it?
>>>>
>>>> it is not too different ... it is based on the .config file of the
>>>> ubuntu kernel with a few tweaks ...
>>>> one odd thing is, that i once was able to boot 2.6.32-rcX kernels, at
>>>> one point, i kept getting these bug messages ... i didn't (knowingly)
>>>> change the configuration, though ...
>>>
>>> Hmmm... weirdly I can't reproduce the problem here with the same
>>> config.  Can you please attach "readelf -a lp.ko" with and without the
>>> module-common.lds struck out?
>>
>> as i said before, the configuration is not really uncommon ... the
>> readelf output is attached.
>
> Hmmm.... I think it's more convoluted than I originally thought.  I
> was expecting a missing section but in the broken case the linker has
> assigned addresses to sections even though it was a relocatable link.
> That's just strange.
>
> Can you please post the output of "ld --version"?  Also, what distro
> are you on?

i am not at that specific machine, but the distribution is the same as 
on my laptop, ubuntu 9.10, x86-64. i don't have any issues, running 
2.6.32.2 on my laptop, though ...

GNU ld (GNU Binutils for Ubuntu) 2.20

hth, tim

-- 
tim@klingt.org
http://tim.klingt.org

Bill Gates left his university to start Micro$oft.
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