svcrdma: Create a kmem cache for the WR contexts

Create a kmem cache to hold WR contexts. Next we will convert
the WR context get and put services to use this kmem cache.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>

1 files changed, 19 insertions, 4 deletions

diff --git a/net/sunrpc/xprtrdma/svc_rdma.c b/net/sunrpc/xprtrdma/svc_rdma.c
index 527acfd3828..87101177825 100644
--- a/net/sunrpc/xprtrdma/svc_rdma.c
+++ b/net/sunrpc/xprtrdma/svc_rdma.c
@@ -69,8 +69,9 @@ atomic_t rdma_stat_rq_prod;
 atomic_t rdma_stat_sq_poll;
 atomic_t rdma_stat_sq_prod;
 
-/* Temporary NFS request map cache */
+/* Temporary NFS request map and context caches */
 struct kmem_cache *svc_rdma_map_cachep;
+struct kmem_cache *svc_rdma_ctxt_cachep;
 
 /*
  * This function implements reading and resetting an atomic_t stat
@@ -246,6 +247,7 @@ void svc_rdma_cleanup(void)
         }
         svc_unreg_xprt_class(&svc_rdma_class);
         kmem_cache_destroy(svc_rdma_map_cachep);
+        kmem_cache_destroy(svc_rdma_ctxt_cachep);
 }
 
 int svc_rdma_init(void)
@@ -268,14 +270,27 @@ int svc_rdma_init(void)
                                                 NULL);
         if (!svc_rdma_map_cachep) {
                 printk(KERN_INFO "Could not allocate map cache.\n");
-                goto err;
+                goto err0;
+        }
+
+        /* Create the temporary context cache */
+        svc_rdma_ctxt_cachep =
+                kmem_cache_create("svc_rdma_ctxt_cache",
+                                  sizeof(struct svc_rdma_op_ctxt),
+                                  0,
+                                  SLAB_HWCACHE_ALIGN,
+                                  NULL);
+        if (!svc_rdma_ctxt_cachep) {
+                printk(KERN_INFO "Could not allocate WR ctxt cache.\n");
+                goto err1;
         }
 
         /* Register RDMA with the SVC transport switch */
         svc_reg_xprt_class(&svc_rdma_class);
         return 0;
-
- err:
+ err1:
+        kmem_cache_destroy(svc_rdma_map_cachep);
+ err0:
         unregister_sysctl_table(svcrdma_table_header);
         return -ENOMEM;
 }