ceph/ceph — pull request #2520 by athanatos (2014-09-18 16:30:23+00:00)
Title: PG::choose_acting: let the pg go down if acting is smaller than min_size

Even if the backfill peer would bring us up to min_size, we can't go
active since build_prior will not consider the interval maybe_went_rw.

Fixes: #9497
Backport: firefly
Signed-off-by: Samuel Just