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: v13.2.3~114^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=438bf49e0213b072cbfd2d1c36b81f849617b467;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>
(cherry picked from commit 2ca5708df6cdb4732e7ced3dcf37c966a09aa4d2)
---

diff --git a/src/mds/MDSRank.cc b/src/mds/MDSRank.cc
index 521d4f54042..ef4a0e6557c 100644
--- a/src/mds/MDSRank.cc
+++ b/src/mds/MDSRank.cc
@@ -1073,6 +1073,11 @@ 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 2199908cbc3..87337090dc6 100644
--- a/src/mds/MDSRank.h
+++ b/src/mds/MDSRank.h
@@ -363,6 +363,7 @@ 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 ceabf8f9b44..2fbc4b3d31b 100644
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -710,7 +710,10 @@ 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);
@@ -732,6 +735,7 @@ 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