linux-kernel - Re: blacklist kernel boot option

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Date:	Mon, 29 Jan 2007 14:38:22 +0100 (MET)
From:	Oliver Neukum <oliver@...kum.name>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	Gerd Hoffmann <kraxel@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: blacklist kernel boot option

Am Montag, 29. Januar 2007 14:23 schrieb Jan Engelhardt:
> 
> On Jan 29 2007 13:44, Oliver Neukum wrote:

> >What use is it to modularly compile something that almost everybody needs?
> 
> [correction: meant CONFIG_BLK_DEV_MD, because CONFIG_MD itself does
> not generate any code]
> 
> So just because almost everyone needs CONFIG_SCSI (SATA, usb_storage,
> you name it), you're going to compile that in as well? It's just
> another 180 KB [BLK_DEV_MD: ~100K] so let's compile it in!

For every module you waste PAGE_SIZE/2. In my system
oliver@...isk:~/Desktop/linux-2.6.20-6-greg> lsmod|wc
     46     158    1827
that's 92K. There is a point where the number of people who don't
need it grows too small to justify that.

> There is a reason initramfs exists, and it's not only for firmware
> loading or running custom scripts.

But shrinking the statically compiled kernel isn't one of them. You need
to look at the actual memory footprint.

	Regards
		Oliver
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