From: Yan, Zheng <zyan@redhat.com>
Date: Wed, 11 Jul 2018 09:30:39 +0000 (+0800)
Subject: mds: reset heartbeat map at potential time-consuming places
X-Git-Tag: v12.2.9~99^2~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=98cce9d8360b43d23be921f4dd34cd8b06240fd5;p=ceph.git

mds: reset heartbeat map at potential time-consuming places

Signed-off-by: Yan, Zheng <zyan@redhat.com>
Fixes: http://tracker.ceph.com/issues/26858
(cherry picked from commit 5a6a9a3fdafa4d68d337e031dd2358215771be8f)

 Conflicts:
	src/mds/Migrator.cc
	src/mds/MDSRank.h
---

diff --git a/src/mds/MDSRank.cc b/src/mds/MDSRank.cc
index bdebfed5bf99..7f6f15b9a02b 100644
--- a/src/mds/MDSRank.cc
+++ b/src/mds/MDSRank.cc
@@ -1827,7 +1827,7 @@ void MDSRankDispatcher::handle_mds_map(
       list<MDSInternalContextBase*> ls;
       ls.swap(p->second);
       waiting_for_mdsmap.erase(p++);
-      finish_contexts(g_ceph_context, ls);
+      queue_waiters(ls);
     }
   }
 
diff --git a/src/mds/MDSRank.h b/src/mds/MDSRank.h
index d26627e8e0c2..e524f99174a7 100644
--- a/src/mds/MDSRank.h
+++ b/src/mds/MDSRank.h
@@ -301,6 +301,10 @@ class MDSRank {
       finished_queue.splice( finished_queue.end(), ls );
       progress_thread.signal();
     }
+    void queue_waiters_front(std::list<MDSInternalContextBase*>& ls) {
+      finished_queue.splice(finished_queue.begin(), ls);
+      progress_thread.signal();
+    }
 
     MDSRank(
         mds_rank_t whoami_,
diff --git a/src/mds/Migrator.cc b/src/mds/Migrator.cc
index f58ec7fd7ef5..b66d12d1a74b 100644
--- a/src/mds/Migrator.cc
+++ b/src/mds/Migrator.cc
@@ -2606,6 +2606,15 @@ void Migrator::import_remove_pins(CDir *dir, set<CDir*>& bounds)
   }
 }
 
+class C_MDC_QueueContexts : public MigratorContext {
+public:
+  list<MDSInternalContextBase*> contexts;
+  C_MDC_QueueContexts(Migrator *m) : MigratorContext(m) {}
+  void finish(int r) override {
+    // execute contexts immediately after 'this' context
+    get_mds()->queue_waiters_front(contexts);
+  }
+};
 
 /*
  * note: this does teh full work of reversing and import and cleaning up
@@ -2633,7 +2642,7 @@ void Migrator::import_reverse(CDir *dir)
 
   cache->adjust_subtree_auth(dir, stat.peer);
 
-  C_ContextsBase<MDSInternalContextBase, MDSInternalContextGather> *fin = new C_ContextsBase<MDSInternalContextBase, MDSInternalContextGather>(g_ceph_context);
+  auto fin = new C_MDC_QueueContexts(this);
   if (!dir->get_inode()->is_auth() &&
       !dir->get_inode()->has_subtree_root_dirfrag(mds->get_nodeid())) {
     dir->get_inode()->clear_scatter_dirty();