> On Jun 12, 2019, at 1:41 PM, Dave Hansen <dave.hansen@xxxxxxxxx> wrote: > > On 6/12/19 1:27 PM, Andy Lutomirski wrote: >>> We've discussed having per-cpu page tables where a given PGD is >>> only in use from one CPU at a time. I *think* this scheme still >>> works in such a case, it just adds one more PGD entry that would >>> have to context-switched. >> Fair warning: Linus is on record as absolutely hating this idea. He >> might change his mind, but it’s an uphill battle. > > Just to be clear, are you referring to the per-cpu PGDs, or to this > patch set with a per-mm kernel area? per-CPU PGDs
