On Mon, Dec 4, 2017 at 6:08 AM, Thomas Gleixner <[email protected]> wrote: > From: Dave Hansen <[email protected]> > > This uses INVPCID to shoot down individual lines of the user mapping > instead of marking the entire user map as invalid. This > could/might/possibly be faster. > > This for sure needs tlb_single_page_flush_ceiling to be redetermined; > esp. since INVPCID is _slow_.
I'm wondering if INVPCID is *so* slow that this patch is entirely counterproductive. --Andy
