[Pvfs2-cvs] commit by pw in pvfs2/src/client/sysint: sys-io.sm

[CVS commit program]

Update of /projects/cvsroot/pvfs2/src/client/sysint
In directory parlweb1:/tmp/cvs-serv32641/src/client/sysint

Modified Files:
	sys-io.sm 
Log Message:
optimistic buffer registration hook in IO path for RDMA transports


Index: sys-io.sm
===================================================================
RCS file: /projects/cvsroot/pvfs2/src/client/sysint/sys-io.sm,v
diff -u -p -p -u -r1.152 -r1.153
--- sys-io.sm	26 Sep 2006 03:44:16 -0000	1.152
+++ sys-io.sm	2 Dec 2006 18:51:52 -0000	1.153
@@ -1663,7 +1663,7 @@ static inline int io_post_flow(
     unsigned long status_user_tag = 0;
     struct filesystem_configuration_s * fs_config;
 
-    gossip_debug(GOSSIP_IO_DEBUG, "- build_context_flow called\n");
+    gossip_debug(GOSSIP_IO_DEBUG, "%s: entry\n", __func__);
 
     if (!sm_p || !cur_ctx)
     {
@@ -1674,6 +1674,23 @@ static inline int io_post_flow(
     attr = &sm_p->getattr.attr;
     assert(attr);
     
+    /*
+     * Notify BMI about the memory buffer the user passed in.  For transports
+     * that need registration, this allows them to work with one large region
+     * rather than lots of small stripe-size regions.  But only bother if the
+     * request is contiguous; too complex and likely no faster in the highly
+     * fragmented case.
+     */
+    if (sm_p->u.io.mem_req->num_contig_chunks == 1)
+    {
+        struct bmi_optimistic_buffer_info binfo;
+
+        binfo.buffer = sm_p->u.io.buffer;
+        binfo.len = PINT_REQUEST_TOTAL_BYTES(sm_p->u.io.mem_req),
+        binfo.rw = sm_p->u.io.io_type;
+        BMI_set_info(cur_ctx->msg.svr_addr, BMI_OPTIMISTIC_BUFFER_REG, &binfo);
+    }
+
     gossip_debug(GOSSIP_IO_DEBUG, "* mem req size is %lld, "
                  "file_req size is %lld (bytes)\n",
                  lld(PINT_REQUEST_TOTAL_BYTES(sm_p->u.io.mem_req)),