Merge pull request ceph#25434 from majianpeng/osd-getpg-reserve

osd/OSD: preallocate for _get_pgs/_get_pgids to avoid reallocate. Reviewed By: Xie Xingguo <[email protected]>
yuvalif · Dec 10, 2018 · cc5ff30 · cc5ff30
2 parents 09da420 + 9c73dcb
commit cc5ff30
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/osd/OSD.cc b/src/osd/OSD.cc
@@ -3983,6 +3983,7 @@ PG* OSD::_make_pg(
 void OSD::_get_pgs(vector<PGRef> *v, bool clear_too)
 {
   v->clear();
+  v->reserve(get_num_pgs());
   for (auto& s : shards) {
     std::lock_guard l(s->shard_lock);
     for (auto& j : s->pg_slots) {
@@ -4000,6 +4001,7 @@ void OSD::_get_pgs(vector<PGRef> *v, bool clear_too)
 void OSD::_get_pgids(vector<spg_t> *v)
 {
   v->clear();
+  v->reserve(get_num_pgs());
   for (auto& s : shards) {
     std::lock_guard l(s->shard_lock);
     for (auto& j : s->pg_slots) {