linux-kernel - Re: [PATCH 0/4] build system: section garbage collection for vmlinux

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <200709122119.57661.vda.linux@googlemail.com>
Date:	Wed, 12 Sep 2007 21:19:57 +0100
From:	Denys Vlasenko <vda.linux@...glemail.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Sam Ravnborg <sam@...nborg.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/4] build system: section garbage collection for vmlinux

On Tuesday 11 September 2007 22:03, Andi Kleen wrote:
> Denys Vlasenko <vda.linux@...glemail.com> writes:
> > 
> >    text    data     bss     dec     hex filename
> > 5159478 1005139  406784 6571401  644589 linux-2.6.23-rc4.org/vmlinux
> > 5131822  996090  401439 6529351  63a147 linux-2.6.23-rc4.gc/vmlinux
> > 
> > In this particular case, 402 objects were discarded, saving 42 kb.
> 
> I wonder how many of those are 100% unused on all configurations? 
> That could be an useful janitor task to clean up

With CONFIG_DISCARD_UNUSED_SECTIONS=y ld will helpfully flood you
with the list of discarded stuff. I pass --print-gc-sections to it.
--
vda
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/