On Fri, Oct 06, 2017 at 03:35:54PM -0700, Dan Williams wrote: > otherwise be quiesced. The need for this knowledge is driven by a need > to make RDMA transfers to DAX mappings safe. If the DAX file's block map > changes we need to be to reliably stop accesses to blocks that have been > freed or re-assigned to a new file. If RDMA is driving this need, why not invalidate backing RDMA MRs instead of requiring a IOMMU to do it? RDMA MR are finer grained and do not suffer from the re-use problem David W. brought up with IOVAs.. Jason
