Write module of kernel (Linux), which to save the

问题:

Need to save the page of process (the user part!) from removing to the swap.

I need to do it in the kernel, only. (language C I know)

(Maybe insert hook in shrink_page_list?)

I have IDs of processes, which need to save and threshold amount of physical memory in the system (We fill, while it isn't filled). IDs and threshold write in /proc, /dev or /sys.

How to approach this?

What files to look at?

What tutorials to read?

Maybe there are examples that are somehow are related with this task.

Info: I compilling kernel of Debian Lenny, use Qemu for start it on my Ubuntu.

回答1:

See get_user_pages. http://www.makelinux.net/ldd3/chp-15-sect-3.

Use get_user_pages, you can get whatever page you want and keep it locked in memory.

Even better, look at the comments on the source at http://lxr.free-electrons.com/source/mm/gup.c#L637