From: Yan, Zheng <zyan@redhat.com>
Date: Thu, 6 Dec 2018 09:22:25 +0000 (+0800)
Subject: client: avoid unnecessary wakeup when handling RENEWCAPS
X-Git-Tag: v13.2.7~27^2~6
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=af08c79cdd15ff282f180a9bcfd13b675c3ebcc7;p=ceph.git

client: avoid unnecessary wakeup when handling RENEWCAPS

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
(cherry picked from commit c744bc1673ca0b4e50f41516fdf49c8560db073a)
---

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 55d293b11fc..8517ecc4b7a 100644
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -2100,9 +2100,11 @@ void Client::handle_client_session(MClientSession *m)
 
   case CEPH_SESSION_RENEWCAPS:
     if (session->cap_renew_seq == m->get_seq()) {
+      bool was_stale = ceph_clock_now() >= session->cap_ttl;
       session->cap_ttl =
 	session->last_cap_renew_request + mdsmap->get_session_timeout();
-      wake_up_session_caps(session, false);
+      if (was_stale)
+	wake_up_session_caps(session, false);
     }
     break;