do not block (writing back to the filesystem potentially) while allocating smb buffers

fs/cifs/connect.c

@@ -182,7 +182,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 
 	daemonize("cifsd");
 	allow_signal(SIGKILL);
-
+	current->flags |= PF_MEMALLOC;
 	server->tsk = current;	/* save process info to wake at shutdown */
 	cFYI(1, ("Demultiplex PID: %d", current->pid));
 
@@ -881,6 +881,7 @@ ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket)
 		} else {
 		/* BB other socket options to set KEEPALIVE, NODELAY? */
 			cFYI(1,("Socket created"));
+	/*		(*csocket)->sk->allocation = GFP_NOFS; */ /* BB is there equivalent in 2.6 */
 		}
 	}
 

fs/cifs/misc.c

@@ -153,7 +153,7 @@ cifs_buf_get(void)
    albeit slightly larger than necessary and maxbuffersize 
    defaults to this and can not be bigger */
 	ret_buf =
-	    (struct smb_hdr *) kmem_cache_alloc(cifs_req_cachep, SLAB_KERNEL);
+	    (struct smb_hdr *) kmem_cache_alloc(cifs_req_cachep, SLAB_KERNEL | SLAB_NOFS);
 
 	/* clear the first few header bytes */
 	if (ret_buf) {