diff --git a/doc/api/child_process.markdown b/doc/api/child_process.markdown
index dd396fa246..9d9f9aa988 100644
--- a/doc/api/child_process.markdown
+++ b/doc/api/child_process.markdown
@@ -194,6 +194,11 @@ And then the child script, `'sub.js'` might look like this:
 In the child the `process` object will have a `send()` method, and `process`
 will emit objects each time it receives a message on its channel.
 
+Please note that the `send()` method on both the parent and child are
+synchronous - sending large chunks of data is not advised (pipes can be used
+instead, see
+[`child_process.spawn`](#child_process_child_process_spawn_command_args_options)).
+
 There is a special case when sending a `{cmd: 'NODE_foo'}` message. All messages
 containing a `NODE_` prefix in its `cmd` property will not be emitted in
 the `message` event, since they are internal messages used by node core.
diff --git a/doc/api/process.markdown b/doc/api/process.markdown
index 699f2d339b..03cd1bd396 100644
--- a/doc/api/process.markdown
+++ b/doc/api/process.markdown
@@ -52,18 +52,21 @@ cases:
 
 ## Event: 'exit'
 
-Emitted when the process is about to exit.  This is a good hook to perform
-constant time checks of the module's state (like for unit tests).  The main
-event loop will no longer be run after the 'exit' callback finishes, so
-timers may not be scheduled.
+Emitted when the process is about to exit. There is no way to prevent the
+exiting of the event loop at this point, and once all `exit` listeners have
+finished running the process will exit. Therefore you **must** only perform
+**synchronous** operations in this handler. This is a good hook to perform
+checks on the module's state (like for unit tests). The callback takes one
+argument, the code the process is exiting with.
 
 Example of listening for `exit`:
 
-    process.on('exit', function() {
+    process.on('exit', function(code) {
+      // do *NOT* do this
       setTimeout(function() {
         console.log('This will not run');
       }, 0);
-      console.log('About to exit.');
+      console.log('About to exit with code:', code);
     });
 
 ## Event: 'uncaughtException'