netdev - Re: [net-2.6.24][patch 2/2] Dynamically allocate the loopback device

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Message-ID: <46EECCD5.5090601@fr.ibm.com>
Date:	Mon, 17 Sep 2007 20:52:05 +0200
From:	Daniel Lezcano <dlezcano@...ibm.com>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
CC:	dlezcano@...ibm.com, netdev@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	containers@...ts.osdl.org, davem@...emloft.net,
	Benjamin Thery <benjamin.thery@...l.net>
Subject: Re: [net-2.6.24][patch 2/2] Dynamically allocate the loopback device

Stephen Hemminger wrote:
> On Mon, 17 Sep 2007 15:45:11 +0200
> dlezcano@...ibm.com wrote:
> 
>> From: Daniel Lezcano <dlezcano@...ibm.com>
>>
>> Doing this makes loopback.c a better example of how to do a
>> simple network device, and it removes the special case
>> single static allocation of a struct net_device, hopefully
>> making maintenance easier.
>>
> 
> What is before/after code and data size, does it make code smaller?

Interesting question, here are the results based on the same config file.

Without the patchset:
----------------------

vmlinux:
    text    data     bss     dec     hex filename
2446606  188243  163840 2798689  2ab461 vmlinux

loopback.o
    text    data     bss     dec     hex filename
     417    1040       8    1465     5b9 drivers/net/loopback.o


With the patchset:
------------------

vmlinux:
    text    data     bss     dec     hex filename
2446853  187187  163840 2797880  2ab138 ./vmlinux

loopback.o
    text    data     bss     dec     hex filename
     609       4      12     625     271 drivers/net/loopback.o


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