2 files changed, 7 insertions, 5 deletions
diff --git a/actionpack/lib/action_controller/caching/pages.rb b/actionpack/lib/action_controller/caching/pages.rb
index 8c583c7ce0..496390402b 100644
--- a/actionpack/lib/action_controller/caching/pages.rb
+++ b/actionpack/lib/action_controller/caching/pages.rb
@@ -16,9 +16,10 @@ module ActionController #:nodoc:
     #     caches_page :show, :new
     #   end
     #
-    # This will generate cache files such as <tt>weblog/show/5.html</tt> and <tt>weblog/new.html</tt>,
-    # which match the URLs used to trigger the dynamic generation. This is how the web server is able
-    # pick up a cache file when it exists and otherwise let the request pass on to Action Pack to generate it.
+    # This will generate cache files such as <tt>weblog/show/5.html</tt> and <tt>weblog/new.html</tt>, which match the URLs used 
+    # that would normally trigger dynamic page generation. Page caching works by configuring a web server to first check for the
+    # existence of files on disk, and to serve them directly when found, without passing the request through to Action Pack.
+    # This is much faster than handling the full dynamic request in the usual way.
     #
     # Expiration of the cache is handled by deleting the cached file, which results in a lazy regeneration approach where the cache
     # is not restored before another hit is made against it. The API for doing so mimics the options from +url_for+ and friends:
@@ -132,8 +133,8 @@ module ActionController #:nodoc:
         end
       end
 
-      # Manually cache the +content+ in the key determined by +options+. If no content is provided, the contents of response.body is used
-      # If no options are provided, the requested url is used. Example:
+      # Manually cache the +content+ in the key determined by +options+. If no content is provided, the contents of response.body is used.
+      # If no options are provided, the url of the current request being handled is used. Example:
       #   cache_page "I'm the cached content", :controller => "lists", :action => "show"
       def cache_page(content = nil, options = nil)
         return unless self.class.perform_caching && caching_allowed?
diff --git a/actionpack/lib/action_controller/caching/sweeping.rb b/actionpack/lib/action_controller/caching/sweeping.rb
index e9db0d97b6..938a6ae81c 100644
--- a/actionpack/lib/action_controller/caching/sweeping.rb
+++ b/actionpack/lib/action_controller/caching/sweeping.rb
@@ -61,6 +61,7 @@ module ActionController #:nodoc:
         end
 
         def after(controller)
+          self.controller = controller
           callback(:after) if controller.perform_caching
           # Clean up, so that the controller can be collected after this request
           self.controller = nil