On Tue, Dec 5, 2017 at 1:57 PM, Dave Hansen <dave.han...@intel.com> wrote: > On 12/05/2017 01:49 PM, Andy Lutomirski wrote: >> Random thought for the future: KPTI will make it possible to avoid >> global IPI broadcasts on kernel flushes as we discussed, incorrectly, >> two years ago at LPC. This could be nice. > > I'm slow. How? >
By introducing an (optional) atomic check for need-to-flush on switches from user CR3 to kernel CR3.
