From: "Randy.Dunlap" <rddunlap@osdl.org>
To: "David S. Miller" <davem@redhat.com>
Cc: root@chaos.analogic.com, bernie@develer.com,
uclinux-dev@uclinux.org, linux-kernel@vger.kernel.org
Subject: Re: Kernel 2.6 size increase
Date: Wed, 23 Jul 2003 14:47:19 -0700 [thread overview]
Message-ID: <20030723144719.103adc19.rddunlap@osdl.org> (raw)
In-Reply-To: <20030723130712.6ac59b56.davem@redhat.com>
On Wed, 23 Jul 2003 13:07:12 -0700 "David S. Miller" <davem@redhat.com> wrote:
| On Wed, 23 Jul 2003 15:14:22 -0400 (EDT)
| "Richard B. Johnson" <root@chaos.analogic.com> wrote:
|
| > On Wed, 23 Jul 2003, Bernardo Innocenti wrote:
| > It looks like a lot of data may have been initialized in the
| > newer kernel, i.e. int barf = 0; or struct vomit = {0,}.
| > If they just declared the static data, it would end up in
| > .bss which is allocated at run-time (and zeroed) and is
| > not in the kernel image.
|
| GCC 3.3 and later do this automatically.
|
| It's weird, since we killed TONS of explicit zero initializers during
| 2.5.x, you'd be pressed to find many examples like the one you
| mention.
|
| Another thing is that the define_per_cpu() stuff eliminated many huge
| [NR_CPUS] arrays. But this probably doesn't apply to his kernel
| unless he built is with SMP enabled.
Yes, lots were already killed off, but there are also several
kernel-janitor patches to remove many more static 0 inits.
They can be found at
http://developer.osdl.org/ogasawara/kj-patches/uninit_static/
and I'll be trying to have them merged, although I don't know
how well they will be accepted.
--
~Randy
next prev parent reply other threads:[~2003-07-23 21:35 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-23 18:46 Kernel 2.6 size increase Bernardo Innocenti
2003-07-23 19:14 ` Richard B. Johnson
2003-07-23 20:07 ` David S. Miller
2003-07-23 21:47 ` Randy.Dunlap [this message]
2003-07-23 19:32 ` [uClinux-dev] " Christoph Hellwig
2003-07-23 20:11 ` David S. Miller
2003-07-23 20:15 ` Christoph Hellwig
2003-07-23 20:22 ` David S. Miller
2003-07-23 20:27 ` Christoph Hellwig
2003-07-23 22:35 ` [uClinux-dev] Kernel 2.6 size increase - get_current()? Bernardo Innocenti
2003-07-23 22:37 ` Alan Cox
2003-07-23 23:00 ` Bernardo Innocenti
2003-07-24 5:06 ` David McCullough
2003-07-24 11:28 ` Alan Cox
2003-07-24 12:04 ` David McCullough
2003-07-24 14:48 ` Alan Cox
2003-07-25 18:25 ` bill davidsen
2003-07-24 15:30 ` Hollis Blanchard
2003-07-24 19:37 ` Alan Cox
2003-07-24 19:51 ` Hollis Blanchard
2003-07-24 21:20 ` J.A. Magallon
2003-07-25 4:22 ` Otto Solares
2003-07-25 14:38 ` Hollis Blanchard
2003-07-28 3:19 ` Miles Bader
2003-07-28 8:14 ` Ihar "Philips" Filipau
2003-07-28 8:58 ` Miles Bader
2003-07-28 9:03 ` Ihar "Philips" Filipau
2003-07-23 21:57 ` [uClinux-dev] Kernel 2.6 size increase Bernardo Innocenti
2003-07-23 22:07 ` Bernardo Innocenti
2003-07-23 22:27 ` Willy Tarreau
2003-07-23 22:34 ` Alan Cox
2003-07-24 20:27 ` Bernardo Innocenti
2003-07-25 15:46 ` Christoph Hellwig
2003-07-25 23:55 ` [PATCH] Make I/O schedulers optional (Was: Re: Kernel 2.6 size increase) Bernardo Innocenti
2003-07-26 8:17 ` Andrew Morton
2003-07-26 12:40 ` Bernardo Innocenti
2003-07-26 14:07 ` Jens Axboe
2003-07-26 23:42 ` Bernardo Innocenti
2003-07-26 23:41 ` Jens Axboe
2003-07-28 17:13 ` [uClinux-dev] Kernel 2.6 size increase Nicolas Pitre
2003-07-28 23:02 ` Bernardo Innocenti
2003-07-29 2:36 ` Miles Bader
2003-08-08 13:25 ` [uClinux-dev] " David Woodhouse
2003-08-08 14:37 ` Bernardo Innocenti
2003-08-08 14:43 ` David Woodhouse
2003-07-25 18:16 ` bill davidsen
2003-07-29 22:29 ` Tom Rini
2003-07-29 22:48 ` Alan Cox
2003-07-29 23:06 ` Tom Rini
2003-07-30 2:07 ` Miles Bader
2003-07-30 15:33 ` Tom Rini
2003-07-31 1:49 ` Miles Bader
2003-07-31 4:17 ` Tom Rini
2003-07-31 5:03 ` Miles Bader
2003-07-31 15:24 ` Tom Rini
2003-07-30 2:49 ` [uClinux-dev] " Bernardo Innocenti
2003-07-30 15:35 ` Tom Rini
2003-07-30 16:45 ` [uClinux-dev] Kernel 2.6 size increase (PATCH) Bernardo Innocenti
[not found] <cArb.74D.1@gated-at.bofh.it>
[not found] ` <cUTh.6JZ.33@gated-at.bofh.it>
[not found] ` <eLiy.31J.3@gated-at.bofh.it>
[not found] ` <eLBW.3eJ.7@gated-at.bofh.it>
[not found] ` <eLVb.3yF.1@gated-at.bofh.it>
[not found] ` <eOJn.5NI.1@gated-at.bofh.it>
[not found] ` <f1dJ.GS.21@gated-at.bofh.it>
[not found] ` <faTE.2LQ.3@gated-at.bofh.it>
[not found] ` <fd56.4Te.9@gated-at.bofh.it>
[not found] ` <fdRv.5uB.9@gated-at.bofh.it>
[not found] ` <fnHd.54o.19@gated-at.bofh.it>
2003-07-31 16:31 ` Kernel 2.6 size increase Ihar "Philips" Filipau
2003-07-31 16:43 ` Tom Rini
2003-07-31 17:04 ` Ihar "Philips" Filipau
2003-07-31 17:20 ` Tom Rini
2003-07-31 18:02 ` Ihar "Philips" Filipau
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