+17. Use sys_clone under Linux to share I/O contexts between dump
+ processes, thus drastically increasing the performance of dump
+ under CFQ (which is the default I/O scheduler used in a number of
+ distributions). Thanks to Jeff Moyer <jmoyer@redhat.com> for the
+ patch.
+
+18. Add (preliminary) ext4 support - thanks to libext2fs which does
+ all the job for us. Thanks to Gertjan van Wingerde
+ <gwingerde@gmail.com> for the patch.
+