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From: "David S. Miller" <davem@redhat.com>
To: root@chaos.analogic.com
Cc: bernie@develer.com, uclinux-dev@uclinux.org,
	linux-kernel@vger.kernel.org
Subject: Re: Kernel 2.6 size increase
Date: Wed, 23 Jul 2003 13:07:12 -0700	[thread overview]
Message-ID: <20030723130712.6ac59b56.davem@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.53.0307231507300.16939@chaos>

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.

  reply	other threads:[~2003-07-23 19:52 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-23 18:46 Bernardo Innocenti
2003-07-23 19:14 ` Richard B. Johnson
2003-07-23 20:07   ` David S. Miller [this message]
2003-07-23 21:47     ` Randy.Dunlap
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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