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
来源：https://stackoverflow.com/questions/13452587/write-module-of-kernel-linux-which-to-save-the-page-of-process-from-removing