osd/ReplicatedPG: fix agent division by zero

If the pool is empty we cannot divide by the object count.

Signed-off-by: Sage Weil <sage@inktank.com>

diff --git a/src/osd/ReplicatedPG.cc b/src/osd/ReplicatedPG.cc
index 32171c3ba4bbf6ca9e60460f42d8957b7da50883..eab9570454a97043af700bef02441c3e56c98414 100644 (file)
--- a/src/osd/ReplicatedPG.cc
+++ b/src/osd/ReplicatedPG.cc
@@ -10753,7 +10753,7 @@ void ReplicatedPG::agent_choose_mode()
   // get dirty, full ratios
   uint64_t dirty_micro = 0;
   uint64_t full_micro = 0;
-  if (pool.info.target_max_bytes) {
+  if (pool.info.target_max_bytes && info.stats.stats.sum.num_objects) {
     uint64_t avg_size = info.stats.stats.sum.num_bytes /
       info.stats.stats.sum.num_objects;
     dirty_micro =