Memory Protection Keys Support Finished Up In Linux 4.9

[phoronix]

Phoronix: Memory Protection Keys Support Finished Up In Linux 4.9

This morning the protection keys syscall interface was submitted for the Linux 4.9 merge window, the last step of adding Protection Keys support to the Linux kernel...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.9-Mem-Protection-Keys

[M@yeulC]

Is there a big benefit to this approach, as opposed to encrypt the whole thing, with, say, a different key for each process?

I guess memory encryption is going to be a very big thing with persistent RAM. We will probably have some very volatile memory somewhere anyway, to offset that by storing the keys (a special key cache on the CPU? ).