Re: [RFC] Maintaining persistent kernel data across module unload/reload

[Keith Owens]

On Wed, 12 Jan 2000 13:24:57 +0100, 
Harald Koenig <[e-mail]> wrote:
>On Jan 12, Keith Owens wrote:
>> (2) For every module that needs persistent data and is configured in,
>>     compile some module specific variables into the static kernel and
>>     export them.
>(2a) For every module that needs persistent data and is configured in,
>compile a 2nd module which will only keep those specific variables.
>no need to compile them into the static kernel...

Expensive, every loaded module takes at least a page of unswappable
kernel space.  It also requires splitting source files, changing
Makefiles and exporting extra variables.