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

[Andi Kleen <andi@firstfloor.org>]

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

No, normally /proc/kallsyms looks similar to System.tap. Where are all
these DW.* symbols coming from? They didn't use to be there and don't
make any sense because they don't have any valid kernel addresses.

> 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.

I noticed a change in behavior.

> 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.

Nothing particular. I uploaded the config at
http://halobates.de/basil-config

> 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.

It's the other way round -- kallsyms changed and that change will likely
break programs.

-Andi