linux-kernel - Re: [REGRESSION] Recent change to kernel spikes out ccache/distcc

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Date:	Wed, 07 Jan 2009 14:40:30 +0000
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	"Al Viro" <viro@...IV.linux.org.uk>
Cc:	<ccache@...ts.samba.org>, "Theodore Ts'o" <tytso@....edu>,
	"Sam Ravnborg" <sam@...nborg.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [REGRESSION] Recent change to kernel spikes out
	 ccache/distcc

>>> Al Viro <viro@...IV.linux.org.uk> 07.01.09 15:37 >>>
>On Wed, Jan 07, 2009 at 02:28:10PM +0000, Jan Beulich wrote:
>> >	b) is there any reason why we can't copy symbol table out of module
>> >ourselves (instead of setting SHF_ALLOC on it) and trim the crap out of
>> >it?  Note that __crc_... is not the only junk in there - you don't need
>> >(or want) to keep the things like undefs for /proc/kallsyms purposes.
>> >And modules *using* an exported symbol are more common that modules exporting
>> >one...  Why not copy it at add_kallsyms() time, skipping the junk we don't
>> >want anyway?
>> 
>> Would certainly be doable, but would seem reasonable only if it's a small
>> set of easily recognizable symbols. If you look at scripts/strip-symbols,
>> you may agree that it's better to do this at build time...
>
>I will not.  Undefined ones are far more common than any of those...

Undefined ones could certainly be stripped out there (while they definitely
can't be at build time).

Jan

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