Commit 842594c8 authored Jul 05, 2017 by Sagi Grimberg

nvme-rdma: unconditionally recycle the request mr



When our RDMA queue-pair is torn down with high load
of I/O traffic, we have no way of knowing if the
memory region was actually registered by the reg_mr
work request as it completion flushes with error (hw
might have done it or not).

So in order to not deal with all this uncertanty, we
simply recycle the MR in reinit_request.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>

parent d09f2b45

drivers/nvme/host/rdma.c

+0 −3

Original line number	Diff line number	Diff line
		@@ -272,9 +272,6 @@ static int nvme_rdma_reinit_request(void data, struct request rq)
		struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
		int ret = 0;

		if (!req->mr->need_inval)
		goto out;

		ib_dereg_mr(req->mr);

		req->mr = ib_alloc_mr(dev->pd, IB_MR_TYPE_MEM_REG,