1 files changed, 3 insertions, 1 deletions
diff --git a/src/osd/PG.cc b/src/osd/PG.cc
index 3879fa08414..87141144a34 100644
--- a/src/osd/PG.cc
+++ b/src/osd/PG.cc
@@ -1236,7 +1236,9 @@ void PG::activate(ObjectStore::Transaction& t, list<Context*>& tfin,
   // initialize snap_trimq
   if (is_primary()) {
     snap_trimq = pool->cached_removed_snaps;
-    snap_trimq.subtract(info.purged_snaps);
+    interval_set<snapid_t> intersect;
+    intersect.intersection_of(snap_trimq, info.purged_snaps);
+    snap_trimq.subtract(intersect);
     dout(10) << "activate - snap_trimq " << snap_trimq << dendl;
     if (!snap_trimq.empty() && is_clean())
       queue_snap_trim();