ceph/ceph — pull request #2770 by dillaman (2014-10-21 23:43:51+00:00)
Title: rbd: Correct readahead divide by zero exception

When readahead is used on old-format RBD images, a divide
by zero signal will be thrown. This was caused by initializing
the readahead alignments prior to initializing the stripe layout
of old-format RBD images.

Signed-off-by: Jason Dillaman