From: Dave Jones <davej@redhat.com>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Cc: netdev@vger.kernel.org
Subject: starting mc triggers lockdep
Date: Fri, 7 Jul 2006 12:13:14 -0400 [thread overview]
Message-ID: <20060707161314.GA3223@redhat.com> (raw)
With 2.6.18rc1 + a selection of the lockdep tweaks found so far,
midnight commander makes the kernel unhappy.
Dave
=======================================================
[ INFO: possible circular locking dependency detected ]
-------------------------------------------------------
mc/4913 is trying to acquire lock:
(sk_lock-AF_INET){--..}, at: [<ffffffff8022800c>] tcp_sendmsg+0x1f/0xb1a
but task is already holding lock:
(&inode->i_mutex){--..}, at: [<ffffffff802692e0>] mutex_lock+0x2a/0x2e
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&inode->i_mutex){--..}:
[<ffffffff802ab6d5>] lock_acquire+0x4a/0x69
[<ffffffff80269102>] __mutex_lock_slowpath+0xeb/0x29f
[<ffffffff802692df>] mutex_lock+0x29/0x2e
[<ffffffff8030f4a0>] create_dir+0x2c/0x1e2
[<ffffffff8030fa5b>] sysfs_create_dir+0x59/0x78
[<ffffffff8034d2e2>] kobject_add+0x114/0x1d8
[<ffffffff803bb1e7>] class_device_add+0xb5/0x49d
[<ffffffff804300b1>] netdev_register_sysfs+0x98/0xa2
[<ffffffff80426f58>] register_netdevice+0x28c/0x376
[<ffffffff8042709c>] register_netdev+0x5a/0x69
[<ffffffff8098aa12>] loopback_init+0x4e/0x53
[<ffffffff8098a918>] net_olddevs_init+0xb/0xb7
[<ffffffff80270918>] init+0x177/0x348
[<ffffffff80263cdd>] child_rip+0x7/0x12
-> #1 (rtnl_mutex){--..}:
[<ffffffff802ab6d5>] lock_acquire+0x4a/0x69
[<ffffffff80269102>] __mutex_lock_slowpath+0xeb/0x29f
[<ffffffff802692df>] mutex_lock+0x29/0x2e
[<ffffffff8042e0a2>] rtnl_lock+0xf/0x12
[<ffffffff8045c7b8>] ip_mc_leave_group+0x1e/0xae
[<ffffffff804467f7>] do_ip_setsockopt+0x6ad/0x9b2
[<ffffffff80446baa>] ip_setsockopt+0x2a/0x84
[<ffffffff80454a55>] udp_setsockopt+0xd/0x1c
[<ffffffff8041f7ea>] sock_common_setsockopt+0xe/0x11
[<ffffffff8041e965>] sys_setsockopt+0x8e/0xb4
[<ffffffff80262f19>] tracesys+0xd0/0xdb
-> #0 (sk_lock-AF_INET){--..}:
[<ffffffff802ab6d5>] lock_acquire+0x4a/0x69
[<ffffffff802371ea>] lock_sock+0xd4/0xe7
[<ffffffff8022800b>] tcp_sendmsg+0x1e/0xb1a
[<ffffffff80248f4b>] inet_sendmsg+0x45/0x53
[<ffffffff80259d25>] sock_sendmsg+0x110/0x130
[<ffffffff8041f462>] kernel_sendmsg+0x3c/0x52
[<ffffffff885399e9>] xs_tcp_send_request+0x117/0x320 [sunrpc]
[<ffffffff885388d5>] xprt_transmit+0x105/0x21e [sunrpc]
[<ffffffff8853771e>] call_transmit+0x1f4/0x239 [sunrpc]
[<ffffffff8853c06e>] __rpc_execute+0x9b/0x1e6 [sunrpc]
[<ffffffff8853c1de>] rpc_execute+0x1a/0x1d [sunrpc]
[<ffffffff885364ad>] rpc_call_sync+0x87/0xb9 [sunrpc]
[<ffffffff885a2587>] nfs3_rpc_wrapper+0x2e/0x74 [nfs]
[<ffffffff885a2a14>] nfs3_proc_lookup+0xe0/0x163 [nfs]
[<ffffffff88594b10>] nfs_lookup+0xef/0x1d6 [nfs]
[<ffffffff8020d300>] do_lookup+0xd0/0x18c
[<ffffffff80209f27>] __link_path_walk+0xa29/0xf7d
[<ffffffff8020f076>] link_path_walk+0x69/0x101
[<ffffffff8020a22b>] __link_path_walk+0xd2d/0xf7d
[<ffffffff8020f076>] link_path_walk+0x69/0x101
[<ffffffff8020d096>] do_path_lookup+0x27b/0x2e7
[<ffffffff802258da>] __user_walk_fd+0x40/0x5c
[<ffffffff8022ae4a>] vfs_stat_fd+0x26/0x5d
[<ffffffff80225592>] sys_newstat+0x21/0x3c
[<ffffffff80262f19>] tracesys+0xd0/0xdb
other info that might help us debug this:
1 lock held by mc/4913:
#0: (&inode->i_mutex){--..}, at: [<ffffffff802692e0>] mutex_lock+0x2a/0x2e
stack backtrace:
Call Trace:
[<ffffffff80271910>] show_trace+0xaa/0x23d
[<ffffffff80271ab8>] dump_stack+0x15/0x17
[<ffffffff802a992f>] print_circular_bug_tail+0x6c/0x77
[<ffffffff802aaf34>] __lock_acquire+0x853/0xa54
[<ffffffff802ab6d6>] lock_acquire+0x4b/0x69
[<ffffffff802371eb>] lock_sock+0xd5/0xe7
[<ffffffff8022800c>] tcp_sendmsg+0x1f/0xb1a
[<ffffffff80248f4c>] inet_sendmsg+0x46/0x53
[<ffffffff80259d26>] sock_sendmsg+0x111/0x130
[<ffffffff8041f463>] kernel_sendmsg+0x3d/0x52
[<ffffffff885399ea>] :sunrpc:xs_tcp_send_request+0x118/0x320
[<ffffffff885388d6>] :sunrpc:xprt_transmit+0x106/0x21e
[<ffffffff8853771f>] :sunrpc:call_transmit+0x1f5/0x239
[<ffffffff8853c06f>] :sunrpc:__rpc_execute+0x9c/0x1e6
[<ffffffff8853c1df>] :sunrpc:rpc_execute+0x1b/0x1d
[<ffffffff885364ae>] :sunrpc:rpc_call_sync+0x88/0xb9
[<ffffffff885a2588>] :nfs:nfs3_rpc_wrapper+0x2f/0x74
[<ffffffff885a2a15>] :nfs:nfs3_proc_lookup+0xe1/0x163
[<ffffffff88594b11>] :nfs:nfs_lookup+0xf0/0x1d6
[<ffffffff8020d301>] do_lookup+0xd1/0x18c
[<ffffffff80209f28>] __link_path_walk+0xa2a/0xf7d
[<ffffffff8020f077>] link_path_walk+0x6a/0x101
[<ffffffff8020a22c>] __link_path_walk+0xd2e/0xf7d
[<ffffffff8020f077>] link_path_walk+0x6a/0x101
[<ffffffff8020d097>] do_path_lookup+0x27c/0x2e7
[<ffffffff802258db>] __user_walk_fd+0x41/0x5c
[<ffffffff8022ae4b>] vfs_stat_fd+0x27/0x5d
[<ffffffff80225593>] sys_newstat+0x22/0x3c
[<ffffffff80262f1a>] tracesys+0xd1/0xdb
--
http://www.codemonkey.org.uk
next reply other threads:[~2006-07-07 16:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-07 16:13 Dave Jones [this message]
2006-07-07 18:48 ` starting mc triggers lockdep Arjan van de Ven
2006-07-08 3:00 ` Herbert Xu
2006-07-08 9:53 ` Arjan van de Ven
2006-07-08 11:12 ` Herbert Xu
2006-07-08 13:46 ` Christoph Hellwig
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