From: Andrew Morton <akpm@zip.com.au>
To: Chris Wedgwood <cw@f00f.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
"David S. Miller" <davem@redhat.com>,
vandrove@vc.cvut.cz, torvalds@transmeta.com,
garzik@havoc.gtf.org, linux-kernel@vger.kernel.org,
paulus@samba.org, davidm@hpl.hp.com, ralf@gnu.org
Subject: Re: [PATCH] Re: crc32 and lib.a (was Re: [PATCH] nbd in 2.5.3 does
Date: Fri, 01 Feb 2002 19:01:56 -0800 [thread overview]
Message-ID: <3C5B56A4.B762948F@zip.com.au> (raw)
In-Reply-To: <20020131.145904.41634460.davem@redhat.com> <E16WQYs-0003Ux-00@the-village.bc.nu>, <E16WQYs-0003Ux-00@the-village.bc.nu> <20020202021242.GA6770@tapu.f00f.org>
Chris Wedgwood wrote:
>
> On Thu, Jan 31, 2002 at 11:24:10PM +0000, Alan Cox wrote:
>
> Because 100 4K drivers suddenly becomes 0.5Mb. There are those of
> us trying to stuff Linux into embedded devices who if anything
> want more configuration options not people taking stuff out.
>
> Well, I'm more or less in agreement here, especially when working with
> small embedded devices which have a few (say 16 or 32) MB of RAM for
> EVERYTHING, kernel, userspace AND filesystems.
>
> However, I wonder if we can't have the linker remove unnecessary and
> unreferences objects, functions and variables?
We can. Graham Stoney had all this going against 2.2. See
http://www.google.com/search?q=stoney+ffunction-sections&hl=en&start=10&sa=N
http://www.cs.helsinki.fi/linux/linux-kernel/Year-2000/2000-29/0415.html
> What I'd much rather see if this is an issue is:
>
> bool 'Do you want to customise for a very small system'
>
> _IF_ the linker can remove things, it would simplify this too --- we
> could if a few important places produce code slightly differently to
> favour speed over size and not reference various things. Also, the
> above option would turn-off inlining as that seems to makie quite a
> difference at times (BTW, I'm not sure about this, but it seems gcc
> and C99 don't agree with static/extern inline semantics?)
The kernel doesn't link when you compile with -fno-inline because of all
the `extern inline' qualifiers. These need to be converted to `static
inline'. Jim Houston has a script which does this. See
http://www.uwsg.iu.edu/hypermail/linux/kernel/0201.3/0888.html
It would be rather good if we could get that script run across the
tree - no-inline has its uses at times.
-
next prev parent reply other threads:[~2002-02-02 3:02 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-31 20:27 crc32 and lib.a (was Re: [PATCH] nbd in 2.5.3 does not Petr Vandrovec
2002-01-31 20:31 ` Jeff Garzik
2002-01-31 22:53 ` [PATCH] " Petr Vandrovec
2002-01-31 22:59 ` David S. Miller
2002-01-31 23:08 ` Jeff Garzik
2002-01-31 23:43 ` David Lang
2002-01-31 23:24 ` [PATCH] Re: crc32 and lib.a (was Re: [PATCH] nbd in 2.5.3 does Alan Cox
2002-01-31 23:21 ` Arnaldo Carvalho de Melo
2002-02-02 16:32 ` Denis Vlasenko
2002-02-02 12:57 ` Jens Axboe
2002-02-02 13:16 ` arjan
2002-02-02 13:52 ` Jens Axboe
2002-02-03 11:37 ` David Woodhouse
2002-01-31 23:43 ` Jeff Garzik
2002-01-31 23:45 ` David S. Miller
2002-02-01 0:32 ` Alan Cox
2002-02-01 10:07 ` Horst von Brand
2002-02-01 10:28 ` Keith Owens
2002-02-01 11:03 ` David S. Miller
2002-02-01 11:25 ` Keith Owens
2002-02-01 14:56 ` Jeff Garzik
2002-02-01 8:14 ` David Woodhouse
2002-02-02 2:12 ` Chris Wedgwood
2002-02-02 3:01 ` Andrew Morton [this message]
2002-02-02 7:30 ` Chris Wedgwood
2002-02-02 7:42 ` Daniel Jacobowitz
2002-02-02 8:08 ` Jeff Garzik
2002-02-02 19:20 ` Daniel Jacobowitz
2002-02-02 8:06 ` Jeff Garzik
2002-02-02 8:08 ` Keith Owens
2002-02-02 8:40 ` David Woodhouse
2002-02-02 8:59 ` Keith Owens
2002-02-02 9:14 ` David Woodhouse
2002-02-03 4:14 ` Eric W. Biederman
2002-02-03 7:01 ` Ralf Baechle
2002-02-03 9:13 ` Chris Wedgwood
2002-02-03 12:16 ` David Woodhouse
2002-02-03 12:33 ` Chris Wedgwood
2002-02-03 12:47 ` David Woodhouse
2002-02-03 13:40 ` Alan Cox
[not found] <20020131.162549.74750188.davem@redhat.com>
2002-02-01 0:42 ` Alan Cox
2002-02-01 0:30 ` David S. Miller
2002-02-01 3:46 ` Jeff Garzik
2002-02-01 4:25 ` David S. Miller
2002-02-01 4:48 ` Jeff Garzik
2002-02-01 5:59 ` David S. Miller
2002-02-01 5:10 ` Keith Owens
2002-02-01 5:12 ` Jeff Garzik
2002-02-01 5:18 ` Keith Owens
2002-02-01 13:42 ` Horst von Brand
2002-02-03 23:34 ` Keith Owens
2002-02-04 20:14 ` Horst von Brand
2002-02-01 6:01 ` David S. Miller
2002-02-01 6:11 ` Keith Owens
2002-02-01 6:26 ` David S. Miller
2002-02-01 6:43 ` Keith Owens
2002-02-01 15:03 ` Alan Cox
2002-02-01 14:55 ` Jeff Garzik
2002-02-01 15:12 ` Petr Vandrovec
2002-02-01 16:08 ` David Woodhouse
2002-02-04 13:24 ` Horst von Brand
2002-02-05 7:51 ` Jeff Garzik
2002-02-01 4:18 ` H. Peter Anvin
2002-02-01 4:35 ` Jeff Garzik
2002-02-01 15:19 ` Alan Cox
2002-02-01 19:37 ` Rob Landley
2002-02-01 19:50 ` Jeff Garzik
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