From: Ingo Molnar <mingo@elte.hu>
To: Jan Engelhardt <jengelh@computergmbh.de>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Oleg Verych <olecom@flower.upol.cz>
Subject: Re: [PATCH 1/2] Colored kernel output (run3)
Date: Sun, 7 Oct 2007 19:08:45 +0200 [thread overview]
Message-ID: <20071007170845.GD32139@elte.hu> (raw)
In-Reply-To: <Pine.LNX.4.64.0710071902410.16301@fbirervta.pbzchgretzou.qr>
* Jan Engelhardt <jengelh@computergmbh.de> wrote:
>
> On Oct 7 2007 18:59, Ingo Molnar wrote:
> >> > vmlinux:
> >> > text data bss dec hex filename
> >> > 7732358 1157269 401408 9291035 8dc51b vmlinux.before
> >> > 7732374 1157269 401408 9291051 8dc52b vmlinux.after
> >> >
> >> >16 bytes, or 0.0002% of the total text size. So there's in essence no
> >> >text overhead to talk about. So the text overhead argument is a red
> >> >herring.
> >>
> >> 16 bytes, huh? Can't be. That would be like, perhaps 5, x86 instructions.
> >
> >yes, it's that low, and it's with the feature disabled.
>
> Ah, with CONFIG_CKO=n, right. But where does that 16 byte increase
> come from, when vt.o itself remains constant in size?
comes from printk.o:
text data bss dec hex filename
6068 231 17636 23935 5d7f kernel/printk.o
6075 231 17636 23942 5d86 kernel/printk.o
the effect of the extra parameter. But that is not worth #ifdef-ing for.
For all practical purposes there's no overhead.
Ingo
next prev parent reply other threads:[~2007-10-07 17:09 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.64.0710062147370.20637@fbirervta.pbzchgretzou.qr>
2007-10-06 20:09 ` Jan Engelhardt
2007-10-06 22:52 ` Alan Cox
2007-10-07 16:38 ` Ingo Molnar
2007-10-07 16:44 ` Jan Engelhardt
2007-10-07 16:44 ` Ingo Molnar
2007-10-07 16:54 ` Jan Engelhardt
2007-10-07 16:59 ` Ingo Molnar
2007-10-07 17:03 ` Jan Engelhardt
2007-10-07 17:08 ` Ingo Molnar [this message]
2007-10-08 23:12 ` Antonino A. Daplas
2007-10-08 23:31 ` Jan Engelhardt
2007-10-08 23:53 ` Antonino A. Daplas
2007-10-09 21:36 ` Bill Davidsen
2007-10-06 20:10 ` [PATCH 2/2] " Jan Engelhardt
2007-10-06 21:25 ` Oleg Verych
2007-10-06 21:27 ` Jan Engelhardt
2007-10-06 22:28 ` On text size and run time if config is "n", " Oleg Verych
2007-10-06 22:20 ` Jan Engelhardt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20071007170845.GD32139@elte.hu \
--to=mingo@elte.hu \
--cc=jengelh@computergmbh.de \
--cc=linux-kernel@vger.kernel.org \
--cc=olecom@flower.upol.cz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome