linux-kernel - Re: /proc/kallsyms broken in 2.6.26-rc1-git6

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Message-ID: <4824AD3C.3070506@grupopie.com>
Date:	Fri, 09 May 2008 20:59:56 +0100
From:	Paulo Marques <pmarques@...popie.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	linux-kernel@...r.kernel.org
Subject: Re: /proc/kallsyms broken in 2.6.26-rc1-git6

Andi Kleen wrote:
>>> ffffffff80337043 u idr_pre_get  [i2c_core]
>>> ffffc2000007573e ? DW.sched.h.920090ff.56       [i2c_core]
>> Are you compiling with CONFIG_KALLSYMS_ALL?
> 
> Yep.
> 
> CONFIG_KALLSYMS=y
> CONFIG_KALLSYMS_ALL=y
> # CONFIG_KALLSYMS_EXTRA_PASS is not set
> 
>> If you are, kallsyms will store all the output of "nm -n vmlinux" no
>> matter what section the symbol belongs to...
> 
> Yes and? Surely that's not correct?

That's not for me to judge, but I believe it has always been like that.

I just wanted to understand if you noticed a change in behavior (which 
is probably a bug) or if it has always been like that but you just 
noticed how ugly it is.

Maybe you also have some debug or markers configuration or something 
that is generating extra symbols to a special section that is just 
making the problem look worse now.

Anyway, I can change the way kallsyms works, but that has to be done 
with some care because there are some userspace tools that read 
/proc/kallsyms and we don't want to break those. A proper testing period 
through -mm should take care of that, though.

-- 
Paulo Marques - www.grupopie.com

"All generalizations are false."
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