osd: link up the documentation for last_epoch_started.

Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>

diff --git a/src/osd/osd_types.h b/src/osd/osd_types.h
index e21cc8c9a7097e23622ffbef7ce58840b38c680b..48b52c34740f07ac64214f26da91909a23f4be18 100644 (file)
--- a/src/osd/osd_types.h
+++ b/src/osd/osd_types.h
@@ -2639,6 +2639,7 @@ struct pg_history_t {
                               // (note: may be pg creation epoch for
                               // pre-luminous clusters)
   epoch_t last_epoch_started = 0;;  // lower bound on last epoch started (anywhere, not necessarily locally)
+                                    // https://docs.ceph.com/docs/master/dev/osd_internals/last_epoch_started/
   epoch_t last_interval_started = 0;; // first epoch of last_epoch_started interval
   epoch_t last_epoch_clean = 0;;    // lower bound on last epoch the PG was completely clean.
   epoch_t last_interval_clean = 0;; // first epoch of last_epoch_clean interval