Check defrag utility on file with large number of fragments, from 20 to 2000.
2000 fragments means that b+tree will have at least two index blocks.
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Dmitry Monakhov