From 8bd5ba86d9ba7169e137fc4f32c553080c056a02 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Tue, 1 Mar 2016 13:07:13 -0500 Subject: svcrdma: Use new CQ API for RPC-over-RDMA server receive CQs Calling ib_poll_cq() to sort through WCs during a completion is a common pattern amongst RDMA consumers. Since commit 14d3a3b2498e ("IB: add a proper completion queue abstraction"), WC sorting can be handled by the IB core. By converting to this new API, svcrdma is made a better neighbor to other RDMA consumers, as it allows the core to schedule the delivery of completions more fairly amongst all active consumers. Because each ib_cqe carries a pointer to a completion method, the core can now post operations on a consumer's QP, and handle the completions itself. svcrdma receive completions no longer use the dto_tasklet. Each polled Receive WC is now handled individually in soft IRQ context. The server transport's rdma_stat_rq_poll and rdma_stat_rq_prod metrics are no longer updated. Signed-off-by: Chuck Lever Signed-off-by: J. Bruce Fields --- include/linux/sunrpc/svc_rdma.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/sunrpc') diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index c2b0d95602d8..cf79ab86d3d4 100644 --- a/include/linux/sunrpc/svc_rdma.h +++ b/include/linux/sunrpc/svc_rdma.h @@ -75,6 +75,7 @@ struct svc_rdma_op_ctxt { struct svc_rdma_fastreg_mr *frmr; int hdr_count; struct xdr_buf arg; + struct ib_cqe cqe; struct list_head dto_q; enum ib_wr_opcode wr_op; enum ib_wc_status wc_status; @@ -174,7 +175,6 @@ struct svcxprt_rdma { struct work_struct sc_work; }; /* sc_flags */ -#define RDMAXPRT_RQ_PENDING 1 #define RDMAXPRT_SQ_PENDING 2 #define RDMAXPRT_CONN_PENDING 3 -- cgit v1.2.3