From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 67751] Stack trace with suspicious RCU usage, when starting
ovs-switchd
Date: Tue, 24 Jun 2014 09:53:55 +0000
Message-ID:
References:
Mime-Version: 1.0
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
To: kvm@vger.kernel.org
Return-path:
Received: from mail.kernel.org ([198.145.19.201]:60576 "EHLO mail.kernel.org"
rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
id S1751475AbaFXJx7 (ORCPT );
Tue, 24 Jun 2014 05:53:59 -0400
Received: from mail.kernel.org (localhost [127.0.0.1])
by mail.kernel.org (Postfix) with ESMTP id B627B2037B
for ; Tue, 24 Jun 2014 09:53:57 +0000 (UTC)
Received: from bugzilla2.web.kernel.org (bugzilla2.web.kernel.org [172.20.200.52])
by mail.kernel.org (Postfix) with ESMTP id 1EE332034E
for ; Tue, 24 Jun 2014 09:53:56 +0000 (UTC)
In-Reply-To:
Sender: kvm-owner@vger.kernel.org
List-ID:
https://bugzilla.kernel.org/show_bug.cgi?id=67751
--- Comment #5 from Kashyap Chamarthy ---
I just saw this again when I attempt to restart OpenvSwitch with Kernel --
3.16.0-0.rc1.git1.1.fc21.x86_64
---------------------
[ 9695.079715]
[ 9695.080492] ===============================
[ 9695.082559] [ INFO: suspicious RCU usage. ]
[ 9695.085105] 3.16.0-0.rc1.git1.1.fc21.x86_64 #1 Not tainted
[ 9695.088505] -------------------------------
[ 9695.090413] net/openvswitch/flow_table.c:255 suspicious
rcu_dereference_protected() usage!
[ 9695.094887]
[ 9695.094887] other info that might help us debug this:
[ 9695.094887]
[ 9695.100722]
[ 9695.100722] rcu_scheduler_active = 1, debug_locks = 0
[ 9695.105699] 1 lock held by ovs-vswitchd/1910:
[ 9695.108199] #0: (cb_lock){++++++}, at: []
genl_rcv+0x19/0x40
[ 9695.113083]
[ 9695.113083] stack backtrace:
[ 9695.115395] CPU: 0 PID: 1910 Comm: ovs-vswitchd Not tainted
3.16.0-0.rc1.git1.1.fc21.x86_64 #1
[ 9695.121638] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 9695.124076] 0000000000000000 000000002c60696c ffff8800b64ff968
ffffffff81807520
[ 9695.127732] ffff88029ce24d70 ffff8800b64ff998 ffffffff810fd7f7
0000000000000000
[ 9695.131321] ffff88029ccc6d20 ffff8800b64ffa90 ffff88029ccc6d00
ffff8800b64ff9b8
[ 9695.134931] Call Trace:
[ 9695.136158] [] dump_stack+0x4d/0x66
[ 9695.139031] [] lockdep_rcu_suspicious+0xe7/0x120
[ 9695.141850] [] ovs_flow_tbl_destroy+0x60/0x70
[openvswitch]
[ 9695.145034] [] ovs_dp_cmd_new+0x311/0x4b0 [openvswitch]
[ 9695.148665] [] genl_family_rcv_msg+0x1bc/0x3e0
[ 9695.152987] [] ? sched_clock+0x9/0x10
[ 9695.157925] [] ? sched_clock_local+0x1d/0x90
[ 9695.162486] [] genl_rcv_msg+0x84/0xc0
[ 9695.166797] [] ? genl_family_rcv_msg+0x3e0/0x3e0
[ 9695.171411] [] netlink_rcv_skb+0xa9/0xd0
[ 9695.175809] [] genl_rcv+0x28/0x40
[ 9695.179489] [] netlink_unicast+0x125/0x1a0
[ 9695.184300] [] netlink_sendmsg+0x35f/0x7d0
[ 9695.188510] [] sock_sendmsg+0x9e/0xe0
[ 9695.192580] [] ? might_fault+0x5e/0xc0
[ 9695.196850] [] ? might_fault+0xb9/0xc0
[ 9695.200907] [] ? might_fault+0x5e/0xc0
[ 9695.204862] [] ___sys_sendmsg+0x408/0x420
[ 9695.208962] [] ? __fget_light+0x13d/0x160
[ 9695.213088] [] ? __fget_light+0x13d/0x160
[ 9695.217652] [] __sys_sendmsg+0x51/0x90
[ 9695.220513] [] SyS_sendmsg+0x12/0x20
[ 9695.223422] [] system_call_fastpath+0x16/0x1b
---------------------
--
You are receiving this mail because:
You are watching the assignee of the bug.