Re: mlock into kernel module

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Fri, 12 May 2006, sej.kernel wrote:

> Hello,
> I need to use mlock and munlock function into a kernel module. How so
> I call this system call from my module ?
> I need to do this because I must use mlock in my software, but I can't
> use root or suser to start it. So mlock alwaays fail.
> Regards,
> sej

You don't call mlock from a module. You can lock down pages inside
your module by using non-paged RAM. This can be accessed from user-space
by implimenting mmap() in your module so that the user-code can
memory-map it. That way, the page(s) you have allocated in the
kernel are never swapped.


Cheers,
Dick Johnson
Penguin : Linux version 2.6.16.4 on an i686 machine (5592.89 BogoMips).
New book: http://www.lymanschool.com
_


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