Re: [for-next PATCH v6 04/10] RDMA/rxe: Allow registering persistent flag for pmem MR only

Jason Gunthorpe
2022-11-22T14:46:54Z

On Wed, Nov 16, 2022 at 04:19:45PM +0800, Li Zhijian wrote:
> int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
> int access, struct rxe_mr *mr)
> {
> @@ -148,16 +157,25 @@ int rxe_mr_init_user(struct rxe_dev *rxe, u64 start, u64 length, u64 iova,
> num_buf = 0;
> map = mr->map;
> if (length > 0) {
> - buf = map[0]->buf;
> + bool persistent_access = access & IB_ACCESS_FLUSH_PERSISTENT;
>
> + buf = map[0]->buf;
> for_each_sgtable_page (&umem->sgt_append.sgt, &sg_iter, 0) {
> + struct page *pg = sg_page_iter_page(&sg_iter);
> +
> + if (persistent_access && !is_pmem_page(pg)) {
> + pr_debug("Unable to register persistent access to non-pmem device\n");
> + err = -EINVAL;
> + goto err_release_umem;

This should use rxe_dbg_mr()

Jason