From: Yan, Zheng <zyan@redhat.com>
Date: Thu, 12 Jul 2018 02:52:57 +0000 (+0800)
Subject: mds: consider max age of dispatch queue when finding stale client
X-Git-Tag: v14.0.1~661^2
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F22999%2Fhead;p=ceph.git

mds: consider max age of dispatch queue when finding stale client

session renew messages from clients can be in the dispatch queue,
waiting for getting dispatched.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
---

diff --git a/src/mds/MDSRank.cc b/src/mds/MDSRank.cc
index 4f056de089528..fcf5452c2dea7 100644
--- a/src/mds/MDSRank.cc
+++ b/src/mds/MDSRank.cc
@@ -1075,6 +1075,11 @@ utime_t MDSRank::get_laggy_until() const
   return beacon.get_laggy_until();
 }
 
+double MDSRank::get_dispatch_queue_max_age(utime_t now) const
+{
+  return messenger->get_dispatch_queue_max_age(now);
+}
+
 bool MDSRank::is_daemon_stopping() const
 {
   return stopping;
diff --git a/src/mds/MDSRank.h b/src/mds/MDSRank.h
index dd6fba923deac..f2ab258a4fe21 100644
--- a/src/mds/MDSRank.h
+++ b/src/mds/MDSRank.h
@@ -367,6 +367,7 @@ class MDSRank {
     void damaged_unlocked();
 
     utime_t get_laggy_until() const;
+    double get_dispatch_queue_max_age(utime_t now) const;
 
     void send_message_mds(Message *m, mds_rank_t mds);
     void forward_message_mds(Message *req, mds_rank_t mds);
diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index f7a9fe7b6dbb6..722ce887011d4 100644
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -756,7 +756,10 @@ void Server::find_idle_sessions()
   // timeout/stale
   //  (caps go stale, lease die)
   utime_t now = ceph_clock_now();
+  double queue_max_age = mds->get_dispatch_queue_max_age(now);
+
   utime_t cutoff = now;
+  cutoff -= queue_max_age;
   cutoff -= mds->mdsmap->get_session_timeout();
   while (1) {
     Session *session = mds->sessionmap.get_oldest_session(Session::STATE_OPEN);
@@ -778,6 +781,7 @@ void Server::find_idle_sessions()
 
   // autoclose
   cutoff = now;
+  cutoff -= queue_max_age;
   cutoff -= mds->mdsmap->get_session_autoclose();
 
   // don't kick clients if we've been laggy