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nvme-rdma: unconditionally recycle the request mr

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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>
This commit is contained in:
Sagi Grimberg 2017-07-05 09:56:13 +03:00
parent d09f2b45f3
commit 842594c877
1 changed files with 0 additions and 3 deletions
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3
drivers/nvme/host/rdma.c
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@ -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,