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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 18:44:52 +0200	[thread overview]
Message-ID: <20071007164452.GA30429@elte.hu> (raw)
In-Reply-To: <20071007163824.GA30063@elte.hu>


Jan,

> This patch makes it possible to give kernel messages a selectable 
> color. It can be chosen at compile time, overridden at boot time, and 
> changed at run time.

here's some (good) text footprint data:

with the feature disabled (which is the default), the text size 
difference with patch #1:

  vmlinux:
     text    data     bss     dec     hex filename
  7732358 1157269  401408 9291035  8dc51b vmlinux.before
  7732358 1157269  401408 9291035  8dc51b vmlinux.after

i.e. no overhead. Text size difference with patch #2:

  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.

	Ingo

  parent reply	other threads:[~2007-10-07 16:45 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 [this message]
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
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

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