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Date: Mon, 31 Dec 2007 18:43:02 +0100
From: Patrick Mau <mau@oscar.ping.de>
To: Jan Engelhardt <jengelh@computergmbh.de>
Cc: Bodo Eggert <7eggert@gmx.de>, Adrian Bunk <bunk@kernel.org>,
       devzero@web.de, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH] Force UNIX domain sockets to be built in
Message-ID: <20071231174302.GA1627@oscar.prima.de>
References: <alpine.LSU.0.999.0712311300020.3686@be1.lrz> <20071231122419.GA13803@does.not.exist> <alpine.LSU.0.999.0712311335210.3761@be1.lrz> <20071231144255.GB13803@does.not.exist> <alpine.LSU.0.999.0712311553530.4211@be1.lrz> <Pine.LNX.4.64.0712311628330.28123@fbirervta.pbzchgretzou.qr>
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On Mon, Dec 31, 2007 at 04:34:55PM +0100, Jan Engelhardt wrote:
> >
> >If you'd aim for a small kernel image, you would build anything as a module 
> >that is not requred for booting.
> >
> Yes, there is a tradeoff for both.
> 
> Example:
> 16:30 ichi:../net/802 > l fc.o fc.ko 
> -rw-r--r-- 1 jengelh users 7961 Dec 27 15:19 fc.ko
> -rw-r--r-- 1 jengelh users 2453 Dec 28 23:58 fc.o
> (from a recent not-so-complete patch turning CONFIG_FC etc. into =m)
> 
> If fc was modular, it might save the 2453 bytes off the core kernel image,
> but adds ~5508 bytes to disk.
> So one has to pick =y or =m depending on whatever suits his/her situation.

May I ask something that might be obvious for most of the
development community:

Modules have to be loaded in seperate pages, right ?

Does that mean that each module wastes partially used
pages of memory at runtime ?

I've always tried to build as much into the kernel image as
possible, because all of my systems have only 512M memory.

Thanks,
Patrick