From: Sagi Grimberg <sagi@grimberg.me>
Date: Wed, 5 Jul 2017 09:56:13 +0300
Subject: nvme-rdma: unconditionally recycle the request mr
Patch-mainline: v4.13-rc1
Git-commit: 842594c8775b585c58459e044708c0335b6aa6b7
References: FATE#323952, FATE#322506
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>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/nvme/host/rdma.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index ccdbd99d5a1c..da04df1af231 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -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,
--
2.12.3