Re: [PATCH 2.5] Retrieve configuration information from kernel

[Padraig Brady <padraig.brady@corvil.com>]

Khalid Aziz wrote:
> Paul Clements wrote:
> 
>>Have you considered compressing the config info in order to reduce
>>the space wastage in the loaded kernel image? Could easily be 10's of KB
>>(not that that's a lot these days). The info would then be retrieved via
>>"gunzip -c", et al. instead of a simple "cat".
> 
> I wanted to start with a simple implementation first. There are a couple
> of things that can be done in future to further improve meory usage: (1)
> Drop "CONFIG_" and "# CONFIG_" from each line and add it back when
> printing from /proc/ikconfig and extract-ikconfig script, (2) Compress
> the resulting configuration. Something to do in near future :)

$ wc -c /usr/src/linux-2.4/.config
   38092 /usr/src/linux-2.4/.config
$ gzip -c /usr/src/linux-2.4/.config | wc -c
   10305
$ sed '/^ *$/d;/^#/d;s/^CONFIG_//'  /usr/src/linux-2.4/.config | wc -c
   17267
$ sed '/^ *$/d;/^#/d;s/^CONFIG_//'  /usr/src/linux-2.4/.config | gzip | wc -c
    6155

Also it seems like it would be more useful to have the config in the
kernel image rather than (just) proc?

Pádraig.