Re: [PATCH] do not save thousands of useless symbols in KALLSYMS kernels

[Paulo Marques <pmarques@grupopie.com>]

Denis Vlasenko wrote:
> Sample of my kernel's mostly useless symbols
> (starting_with:# of symbols):
>
> __func__: 624
> __vendorstr_: 1760
> __pci_fixup_PCI_: 116
> __ksymtab_: 2597
> __kstrtab_: 2597
> __kcrctab_: 2597
> __initcall_: 236
> __devicestr_: 4686
> __devices_: 1760
> Total: 16973
> Lines in System.map: 39735
>
> Excluding them from in-kernel symbol table saves ~300kb:
>
>    text    data     bss     dec     hex filename
> 4337710 1054414  259296 5651420  563bdc vmlinux.carrier1 - w/o KALLSYMS
> 4342068 1296046  259296 5897410  59fcc2 vmlinux - with KALLSYMS+patch
> 4341948 1607634  259296 6208878  5ebd6e vmlinux.carrier - with KALLSYMS
>         ^^^^^^^

Hummm.... these symbols should only go in if you config KALLSYMS_ALL. 
Are you sure your configuration doesn't have KALLSYMS_ALL enabled?

If it does, it seems like the correct behavior to include all symbols if 
you specified that you wanted _all_ symbols :)

By the way, there is a completely different version of 
scripts/kallsyms.c in -mm that you might want to look at. It will 
probably go in after 2.6.13 is out.

--
Paulo Marques - www.grupopie.com

It is a mistake to think you can solve any major problems
just with potatoes.
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