libceph: don't complain on msgpool alloc failures

The pool allocation failures are masked by the pool; there is no need to
spam the console about them.  (That's the whole point of having the pool
in the first place.)

Mark msg allocations whose failure is safely handled as such.

Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/net/ceph/msgpool.c b/net/ceph/msgpool.c
index 1f4cb30..11d5f41 100644
--- a/net/ceph/msgpool.c
+++ b/net/ceph/msgpool.c
@@ -12,7 +12,7 @@
 	struct ceph_msgpool *pool = arg;
 	struct ceph_msg *msg;
 
-	msg = ceph_msg_new(0, pool->front_len, gfp_mask);
+	msg = ceph_msg_new(0, pool->front_len, gfp_mask, true);
 	if (!msg) {
 		dout("msgpool_alloc %s failed\n", pool->name);
 	} else {
@@ -61,7 +61,7 @@
 		WARN_ON(1);
 
 		/* try to alloc a fresh message */
-		return ceph_msg_new(0, front_len, GFP_NOFS);
+		return ceph_msg_new(0, front_len, GFP_NOFS, false);
 	}
 
 	msg = mempool_alloc(pool->pool, GFP_NOFS);