On Thu, Dec 06, 2018 at 04:39:20PM +0800, oulijun wrote: > > Hi, Christoph Hellwig & Jason > I found a question about IB core recently. We need to call get_dma_mr verbs and don't enable the mr_access_flags for IB_ACCESS_REMOTE_ATOMIC. > Why? Is it not supported? What should we do if we need to call get_dma_mr for allowing incoming RDMA Atomic in mr? You should never call get_dma_mr yourself. Currently we have no kernel ULPs that want to use atomic operations. But if you plan to submit one you can add a patch to the front of the series to enable atomic access in __ib_alloc_pd. However we really should only do that for local access - using the global rkey is a really bad idea an discouraged.
