btrfs-progs: docs: add note about resizing to max after device replace

Signed-off-by: Alexander Fougner <fougner89@gmail.com>
[ formatting adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/Documentation/btrfs-replace.asciidoc b/Documentation/btrfs-replace.asciidoc
index 5a14a40..aae349a 100644 (file)
--- a/Documentation/btrfs-replace.asciidoc
+++ b/Documentation/btrfs-replace.asciidoc
@@ -33,6 +33,10 @@ the path to the source device. If the source device is disconnected,
 from the system, you have to use the devid parameter format.
 The <targetdev> needs to be same size or larger than the <srcdev>.
 +
+NOTE: the filesystem has to be resized to fully take advantage of a
+larger target device, this can be achieved with
+`btrfs filesystem resize <devid>:max /path`
++
 `Options`
 +
 -r::::