Memory Protection Keys (MPK) Submitted For Linux 4.6

[phoronix]

Phoronix: Memory Protection Keys (MPK) Submitted For Linux 4.6

Support for Memory Protection Keys (PKeys/MPK) that will be found on future Intel CPUs is being proposed for inclusion into Linux 4.6...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-4.6-MPK-PKeys

[pegasus]

This tech will be available in E5 v5 xeons.

[Danny3]

Is this a real thing or they are just putting it so they will have a reason to require some more binary blobs?

[pegasus]

Read the lwn article referenced by lkml post. Apparently they found a way to use four unused bits in page mapping table.

My understanding of "real thing" is tagged memory (like i960mx had), so this is not "real thing" for me but a step in a right direction.