On Sat, Jan 12, 2019 at 07:43:02AM +0100, Mike Galbraith wrote: > On Wed, 2019-01-09 at 11:26 -0800, Sean Christopherson wrote: > > > > I'll try to bisect. > > Good luck with that. I gave it a go, but that apparently invalidated > the warrantee of my vm image :) This is fixed in v5.0-rc2 by commit ba422731316d ("mm/mmu_notifier: mm/rmap.c: Fix a mmu_notifier range bug in try_to_unmap_one"). Nested VMs are great for bisecting KVM issues :)