From patchwork Tue Nov 20 17:17:04 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herton Ronaldo Krzesinski X-Patchwork-Id: 200441 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from chlorine.canonical.com (chlorine.canonical.com [91.189.94.204]) by ozlabs.org (Postfix) with ESMTP id 3A76A2C008E for ; Wed, 21 Nov 2012 04:17:45 +1100 (EST) Received: from localhost ([127.0.0.1] helo=chlorine.canonical.com) by chlorine.canonical.com with esmtp (Exim 4.71) (envelope-from ) id 1TarS3-0002GH-2j; Tue, 20 Nov 2012 17:17:35 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by chlorine.canonical.com with esmtp (Exim 4.71) (envelope-from ) id 1TarRc-0001vM-Lj for kernel-team@lists.ubuntu.com; Tue, 20 Nov 2012 17:17:09 +0000 Received: from [177.132.111.71] (helo=canonical.com) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1TarRb-000318-Tz; Tue, 20 Nov 2012 17:17:08 +0000 From: Herton Ronaldo Krzesinski To: Alex Elder Subject: [ 3.5.yuz extended stable ] Patch "libceph: just set SOCK_CLOSED when state changes" has been added to staging queue Date: Tue, 20 Nov 2012 15:17:04 -0200 Message-Id: <1353431825-8943-1-git-send-email-herton.krzesinski@canonical.com> X-Mailer: git-send-email 1.7.9.5 Cc: kernel-team@lists.ubuntu.com, Sage Weil X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.13 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: kernel-team-bounces@lists.ubuntu.com Errors-To: kernel-team-bounces@lists.ubuntu.com This is a note to let you know that I have just added a patch titled libceph: just set SOCK_CLOSED when state changes to the linux-3.5.y-queue branch of the 3.5.yuz extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.yuz tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Herton ------ From e8d4410b595bb3c160244219711722dd95be9175 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Wed, 20 Jun 2012 21:53:53 -0500 Subject: [PATCH 34/78] libceph: just set SOCK_CLOSED when state changes commit d65c9e0b9eb43d14ece9dd843506ccba06162ee7 upstream. When a TCP_CLOSE or TCP_CLOSE_WAIT event occurs, the SOCK_CLOSED connection flag bit is set, and if it had not been previously set queue_con() is called to ensure con_work() will get a chance to handle the changed state. con_work() atomically checks--and if set, clears--the SOCK_CLOSED bit if it was set. This means that even if the bit were set repeatedly, the related processing in con_work() only gets called once per transition of the bit from 0 to 1. What's important then is that we ensure con_work() gets called *at least* once when a socket close event occurs, not that it gets called *exactly* once. The work queue mechanism already takes care of queueing work only if it is not already queued, so there's no need for us to call queue_con() conditionally. So this patch just makes it so the SOCK_CLOSED flag gets set unconditionally in ceph_sock_state_change(). Signed-off-by: Alex Elder Reviewed-by: Sage Weil Signed-off-by: Herton Ronaldo Krzesinski --- net/ceph/messenger.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- 1.7.9.5 diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 5bd243e..cd1aaa8 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -261,8 +261,8 @@ static void ceph_sock_state_change(struct sock *sk) case TCP_CLOSE_WAIT: dout("%s TCP_CLOSE_WAIT\n", __func__); con_sock_state_closing(con); - if (!test_and_set_bit(SOCK_CLOSED, &con->flags)) - queue_con(con); + set_bit(SOCK_CLOSED, &con->flags); + queue_con(con); break; case TCP_ESTABLISHED: dout("%s TCP_ESTABLISHED\n", __func__);