On Thu, Aug 23, 2018 at 06:47:09PM +1000, Nicholas Piggin wrote: > The generic tlb_end_vma does not call invalidate_range mmu notifier, > and it resets resets the mmu_gather range, which means the notifier > won't be called on part of the range in case of an unmap that spans > multiple vmas. > > ARM64 seems to be the only arch I could see that has notifiers and > uses the generic tlb_end_vma. I have not actually tested it. > > Signed-off-by: Nicholas Piggin <[email protected]> > --- > include/asm-generic/tlb.h | 17 +++++++++++++---- > mm/memory.c | 10 ---------- > 2 files changed, 13 insertions(+), 14 deletions(-)
I think we only use the notifiers in the KVM code, which appears to leave the ->invalidate_range() callback empty, so that at least explains why we haven't run into problems here. But the change looks correct to me, so: Acked-by: Will Deacon <[email protected]> Thanks, Will
