Branch b1_6

b=16373
i=zhenyu.xu, shengyang

Search for ":/" instead of ":"

lustre/utils/mount_lustre.c

@@ -582,7 +582,8 @@ int main(int argc, char *const argv[])
                 printf("mounting device %s at %s, flags=%#x options=%s\n",
                        source, target, flags, optcopy);
 
-        if (set_tunables(source, strlen(source)) && verbose)
+        if (!strstr(usource, ":/") && set_tunables(source, strlen(source)) &&
+            verbose)
                 fprintf(stderr, "%s: unable to set tunables for %s"
                                 " (may cause reduced IO performance)\n",
                                 argv[0], source);