On Thu, 2019-01-31 at 10:30:22 UTC, Peter Xu wrote: > The change_pte() notifier was designed to use as a quick path to > update secondary MMU PTEs on write permission changes or PFN changes. > For KVM, it could reduce the vm-exits when vcpu faults on the pages > that was touched up by KSM. It's not used to do cache invalidations, > for example, if we see the notifier will be called before the real PTE > update after all (please see set_pte_at_notify that set_pte_at was > called later). > > All the necessary cache invalidation should all be done in > invalidate_range() already. > > CC: Benjamin Herrenschmidt <b...@kernel.crashing.org> > CC: Paul Mackerras <pau...@samba.org> > CC: Michael Ellerman <m...@ellerman.id.au> > CC: Alistair Popple <alist...@popple.id.au> > CC: Alexey Kardashevskiy <a...@ozlabs.ru> > CC: Mark Hairgrove <mhairgr...@nvidia.com> > CC: Balbir Singh <bsinghar...@gmail.com> > CC: David Gibson <da...@gibson.dropbear.id.au> > CC: Andrea Arcangeli <aarca...@redhat.com> > CC: Jerome Glisse <jgli...@redhat.com> > CC: Jason Wang <jasow...@redhat.com> > CC: linuxppc-...@lists.ozlabs.org > CC: linux-kernel@vger.kernel.org > Signed-off-by: Peter Xu <pet...@redhat.com> > Reviewed-by: Andrea Arcangeli <aarca...@redhat.com> > Reviewed-by: Alistair Popple <alist...@popple.id.au> > Reviewed-by: Balbir Singh <bsinghar...@gmail.com>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/1b58a975be36994a572ae3b3fb3e0232 cheers
