From 3c507667b00bdb5002da009b0712091c3225f2f2 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Thu, 23 Jul 2015 16:31:03 -0400
Subject: [PATCH] osd/ReplicatedPG: dynamically vary sort order for backfill
 sets and maps

Reset the map and set so that the comparator matches the sort order at the
start of each backfill.

Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/osd/ReplicatedPG.cc | 15 ++++++++++++---
 src/osd/ReplicatedPG.h  |  4 ++--
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/osd/ReplicatedPG.cc b/src/osd/ReplicatedPG.cc
index 6726328c5bdd9..8a74c691961e9 100644
--- a/src/osd/ReplicatedPG.cc
+++ b/src/osd/ReplicatedPG.cc
@@ -1216,6 +1216,8 @@ ReplicatedPG::ReplicatedPG(OSDService *o, OSDMapRef curmap,
       _pool.info, curmap, this, coll_t(p), o->store, cct)),
   object_contexts(o->cct, g_conf->osd_pg_object_context_cache_count),
   snapset_contexts_lock("ReplicatedPG::snapset_contexts"),
+  backfills_in_flight(hobject_t::Comparator(true)),
+  pending_backfill_updates(hobject_t::Comparator(true)),
   new_backfill(false),
   temp_seq(0),
   snap_trimmer_machine(this)
@@ -8997,7 +8999,7 @@ void ReplicatedPG::_clear_recovery_state()
   recovering_oids.clear();
 #endif
   last_backfill_started = hobject_t();
-  set<hobject_t, hobject_t::BitwiseComparator>::iterator i = backfills_in_flight.begin();
+  set<hobject_t, hobject_t::Comparator>::iterator i = backfills_in_flight.begin();
   while (i != backfills_in_flight.end()) {
     assert(recovering.count(*i));
     backfills_in_flight.erase(i++);
@@ -9655,6 +9657,12 @@ int ReplicatedPG::recover_backfill(
     }
     backfill_info.reset(last_backfill_started,
 			get_sort_bitwise());
+
+    // initialize comparators
+    backfills_in_flight = set<hobject_t, hobject_t::Comparator>(
+      hobject_t::Comparator(get_sort_bitwise()));
+    pending_backfill_updates = map<hobject_t, pg_stat_t, hobject_t::Comparator>(
+      hobject_t::Comparator(get_sort_bitwise()));
   }
 
   for (set<pg_shard_t>::iterator i = backfill_targets.begin();
@@ -9890,7 +9898,7 @@ int ReplicatedPG::recover_backfill(
   pgbackend->run_recovery_op(h, cct->_conf->osd_recovery_op_priority);
 
   dout(5) << "backfill_pos is " << backfill_pos << dendl;
-  for (set<hobject_t, hobject_t::BitwiseComparator>::iterator i = backfills_in_flight.begin();
+  for (set<hobject_t, hobject_t::Comparator>::iterator i = backfills_in_flight.begin();
        i != backfills_in_flight.end();
        ++i) {
     dout(20) << *i << " is still in flight" << dendl;
@@ -9900,7 +9908,8 @@ int ReplicatedPG::recover_backfill(
     backfill_pos : *(backfills_in_flight.begin());
   hobject_t new_last_backfill = earliest_backfill();
   dout(10) << "starting new_last_backfill at " << new_last_backfill << dendl;
-  for (map<hobject_t, pg_stat_t, hobject_t::BitwiseComparator>::iterator i = pending_backfill_updates.begin();
+  for (map<hobject_t, pg_stat_t, hobject_t::Comparator>::iterator i =
+	 pending_backfill_updates.begin();
        i != pending_backfill_updates.end() &&
 	 cmp(i->first, next_backfill_to_complete, get_sort_bitwise()) < 0;
        pending_backfill_updates.erase(i++)) {
diff --git a/src/osd/ReplicatedPG.h b/src/osd/ReplicatedPG.h
index 80ebb280be487..206e09c544236 100644
--- a/src/osd/ReplicatedPG.h
+++ b/src/osd/ReplicatedPG.h
@@ -1074,8 +1074,8 @@ protected:
    *   - are not included in pg stats (yet)
    *   - have their stats in pending_backfill_updates on the primary
    */
-  set<hobject_t, hobject_t::BitwiseComparator> backfills_in_flight;
-  map<hobject_t, pg_stat_t, hobject_t::BitwiseComparator> pending_backfill_updates;
+  set<hobject_t, hobject_t::Comparator> backfills_in_flight;
+  map<hobject_t, pg_stat_t, hobject_t::Comparator> pending_backfill_updates;
 
   void dump_recovery_info(Formatter *f) const {
     f->open_array_section("backfill_targets");
-- 
2.39.5