Reworking page-table traversal

Posted May 10, 2018 20:54 UTC (Thu) by kiryl (subscriber, #41516)
In reply to: Reworking page-table traversal by luto
Parent article: Reworking page-table traversal

8-byte entries is not enough. We already run out of bits in the entries and every new feature wants to claim one (or 15 with MKTME :P).

Why is separate roots from kernel/user useful? Is it only to protect against Meltdown-alike stuff?