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 <[email protected]> > CC: Paul Mackerras <[email protected]> > CC: Michael Ellerman <[email protected]> > CC: Alistair Popple <[email protected]> > CC: Alexey Kardashevskiy <[email protected]> > CC: Mark Hairgrove <[email protected]> > CC: Balbir Singh <[email protected]> > CC: David Gibson <[email protected]> > CC: Andrea Arcangeli <[email protected]> > CC: Jerome Glisse <[email protected]> > CC: Jason Wang <[email protected]> > CC: [email protected] > CC: [email protected] > Signed-off-by: Peter Xu <[email protected]> > Reviewed-by: Andrea Arcangeli <[email protected]> > Reviewed-by: Alistair Popple <[email protected]> > Reviewed-by: Balbir Singh <[email protected]>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/1b58a975be36994a572ae3b3fb3e0232 cheers
