From mboxrd@z Thu Jan 1 00:00:00 1970 From: Valdis.Kletnieks@vt.edu Subject: mmotm 2010-11-23 - lockdep whinge in e1000e driver Date: Tue, 23 Nov 2010 23:52:34 -0500 Message-ID: <5622.1290574354@localhost> References: <201011240045.oAO0jYQ5016010@imap1.linux-foundation.org> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_1290574354_5261P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Cc: mm-commits@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: akpm@linux-foundation.org, Peter Zijlstra , Ingo Molnar , Jesse Brandeburg Return-path: In-Reply-To: Your message of "Tue, 23 Nov 2010 16:13:06 PST." <201011240045.oAO0jYQ5016010@imap1.linux-foundation.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org --==_Exmh_1290574354_5261P Content-Type: text/plain; charset=us-ascii On Tue, 23 Nov 2010 16:13:06 PST, akpm@linux-foundation.org said: > The mm-of-the-moment snapshot 2010-11-23-16-12 has been uploaded to > > http://userweb.kernel.org/~akpm/mmotm/ Whinges during boot while bringing up the ethernet interface: [ 1.081504] =================================================== [ 1.081507] [ INFO: suspicious rcu_dereference_check() usage. ] [ 1.081509] --------------------------------------------------- [ 1.081512] include/linux/inetdevice.h:208 invoked rcu_dereference_check() without protection! [ 1.081514] [ 1.081515] other info that might help us debug this: [ 1.081516] [ 1.081518] [ 1.081518] rcu_scheduler_active = 1, debug_locks = 1 [ 1.081521] 3 locks held by swapper/1: [ 1.081523] #0: (&__lockdep_no_validate__){+.+.+.}, at: [] device_lock+0xf/0x11 [ 1.081534] #1: (&__lockdep_no_validate__){+.+.+.}, at: [] device_lock+0xf/0x11 [ 1.081541] #2: (rtnl_mutex){+.+.+.}, at: [] rtnl_lock+0x12/0x14 [ 1.081549] [ 1.081550] stack backtrace: [ 1.081553] Pid: 1, comm: swapper Not tainted 2.6.37-rc3-mmotm1123 #3 [ 1.081555] Call Trace: [ 1.081562] [] lockdep_rcu_dereference+0x9d/0xa5 [ 1.081567] [] __in_dev_get_rcu.clone.12+0x3f/0x47 [ 1.081571] [] inet_get_link_af_size+0x10/0x1f [ 1.081575] [] if_nlmsg_size+0xd5/0x111 [ 1.081579] [] rtmsg_ifinfo+0x1f/0xeb [ 1.081584] [] ? raw_notifier_call_chain+0xf/0x11 [ 1.081589] [] register_netdevice+0x3ea/0x410 [ 1.081593] [] register_netdev+0x3a/0x4c [ 1.081599] [] e1000_probe+0x986/0xb6f [ 1.081604] [] local_pci_probe+0x3f/0x70 [ 1.081608] [] pci_device_probe+0x65/0x96 [ 1.081614] [] ? sysfs_create_link+0xe/0x10 [ 1.081617] [] driver_probe_device+0xe8/0x182 [ 1.081621] [] __driver_attach+0x4a/0x6b [ 1.081625] [] ? __driver_attach+0x0/0x6b [ 1.081629] [] bus_for_each_dev+0x57/0x83 [ 1.081633] [] driver_attach+0x19/0x1b [ 1.081637] [] bus_add_driver+0xae/0x205 [ 1.081641] [] driver_register+0xb5/0x122 [ 1.081646] [] ? e1000_init_module+0x0/0x3e [ 1.081650] [] __pci_register_driver+0x61/0xcd [ 1.081654] [] ? e1000_init_module+0x0/0x3e [ 1.081658] [] e1000_init_module+0x3c/0x3e [ 1.081663] [] do_one_initcall+0x7a/0x12f [ 1.081668] [] kernel_init+0x15d/0x1e7 [ 1.081672] [] kernel_thread_helper+0x4/0x10 [ 1.081678] [] ? finish_task_switch+0x3f/0xe3 [ 1.081682] [] ? restore_args+0x0/0x30 [ 1.081686] [] ? kernel_init+0x0/0x1e7 [ 1.081690] [] ? kernel_thread_helper+0x0/0x10 [ 1.081731] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) 00:24:e8:c6:ad:17 --==_Exmh_1290574354_5261P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFM7JoScC3lWbTT17ARAub5AKCMW0SAbmgnBhEFO4yeESALSwXuAgCggcyd AZWiMkMs8rtx3Vkay8tm8Wg= =GBVK -----END PGP SIGNATURE----- --==_Exmh_1290574354_5261P--