linux-kernel - Re: 2.6.32 regression: unable to handle kernel paging request

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Message-ID: <4B33592B.6000107@kernel.org>
Date:	Thu, 24 Dec 2009 21:06:03 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Tim Blechmann <tim@...ngt.org>
CC:	linux-kernel@...r.kernel.org, stern@...land.harvard.edu,
	x86@...nel.org
Subject: Re: 2.6.32 regression: unable to handle kernel paging request

Hello,

On 12/21/2009 06:32 PM, Tim Blechmann wrote:
>>>>> 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?

Thanks.

-- 
tejun
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