xprtrdma: Reduce number of MRs created by rpcrdma_mrs_create

Create fewer MRs on average. Many workloads don't need as many as
32 MRs, and the transport can now quickly restock the MR free list.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index d36c18f26cd3188081cad44878748c7be82129ca..ab8672443c3a5f2e0624e6b246b5de5862addaea 100644 (file)
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1023,7 +1023,7 @@ rpcrdma_mrs_create(struct rpcrdma_xprt *r_xprt)
        LIST_HEAD(free);
        LIST_HEAD(all);
 
-       for (count = 0; count < 32; count++) {
+       for (count = 0; count < 3; count++) {
                struct rpcrdma_mr *mr;
                int rc;