- extended comment

diff --git a/snapper/BtrfsUtils.cc b/snapper/BtrfsUtils.cc
index 0c002054beca1b1d7316e1db74d0f684c9bd1fad..2f7e2a93c917da75592874b73aa3bf603be58186 100644 (file)
--- a/snapper/BtrfsUtils.cc
+++ b/snapper/BtrfsUtils.cc
@@ -84,7 +84,10 @@ namespace snapper
     namespace BtrfsUtils
     {
 
-       // See btrfsprogs source code for references.
+       // For general information about btrfs see
+       // https://btrfs.wiki.kernel.org/ and for more information about btrfs
+       // quota groups see http://sensille.com/qgroups.pdf.  For ioctls see
+       // btrfsprogs source code for references.
 
 
        bool