@@ -156,7 +156,7 @@ string is equivalent to setting the `--tlsverify` flag. The following are equiva

 ### Daemon storage-driver option

 The Docker daemon has support for three different image layer storage drivers: `aufs`,

-`devicemapper`, and `btrfs`.

+`devicemapper`, `btrfs` and `overlayfs`.

 The `aufs` driver is the oldest, but is based on a Linux kernel patch-set that

 is unlikely to be merged into the main kernel. These are also known to cause some

@@ -175,6 +175,9 @@ To tell the Docker daemon to use `devicemapper`, use

 The `btrfs` driver is very fast for `docker build` - but like `devicemapper` does not

 share executable memory between devices. Use `docker -d -s btrfs -g /mnt/btrfs_partition`.

+The `overlayfs` is a very fast union filesystem. It is now merged in the main

+Linux kernel as of [3.18.0](https://lkml.org/lkml/2014/10/26/137).

+Call `docker -d -s overlayfs` to use it.

 ### Docker exec-driver option