Messages in this thread | | | Subject | Re: [PATCH v6 03/11] mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) | From | Dave Hansen <> | Date | Wed, 20 Sep 2017 17:04:35 -0700 |
| |
On 09/20/2017 05:02 PM, Tycho Andersen wrote: > ...and makes it easier to pair tlb flushes with changing the > protections. I guess we still need the for loop, because we need to > set/unset the xpfo bits as necessary, but I'll switch it to a single > set_kpte(). This also implies that the xpfo bits should all be the > same on every page in the mapping, which I think is true.
FWIW, it's a bit bonkers to keep all this duplicate xpfo metadata for compound pages. You could probably get away with only keeping it for the head page.
| |