Module vs Kernel main performacne

[Mulyadi Santosa]

Hi...

On Wed, May 30, 2012 at 11:51 AM, Abu Rasheda <rcpilot2010 at gmail.com> wrote:
> When you say, LKM area is prepared with vmalloc is it for code /
> executable you refering too ?

Yes, AFAIK memory area code and static data in linux kernel module is
allocated via vmalloc().

>if so will it matter for data copy ?

see my previous reply :)

>
> Point # 2. Some one was saying that on atleast MIPS it takes more
> cycle to call kernel main function from module because of log jump.
> Does it apply to x86_64 to ?

IIRC long jump means jumping more than 64 KB...but that's in real mode
in 32 bit...so I am not sure whether it still applies in protected
mode.

> To teat above two should I make my module part of static kernel ?

good idea....i think you can try that... :)

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com