On Wed, Nov 1, 2017 at 2:11 PM, Thomas Gleixner <t...@linutronix.de> wrote: > On Tue, 31 Oct 2017, Dave Hansen wrote: > >> >> init_mm is for kernel-exclusive use. If someone is allocating page >> tables in it, do not set _PAGE_USER on them. This ensures that >> we do *not* set NX on these page tables in the KAISER code. > > This changelog is confusing at best. > > Why is this a kaiser issue? Nothing should ever create _PAGE_USER entries > in init_mm, right?
The vsyscall page is _PAGE_USER and lives in init_mm via the fixmap. --Andy
