Re: more rc1 lockdep fun.
On Fri, 2006-07-07 at 14:58 -0400, Dave Jones wrote:
===
[ INFO: possible circular locking dependency detected ]
---
gnome-settings-/3278 is trying to acquire lock:
(sk_lock-AF_INET){--..}, at: [8022800c] tcp_sendmsg+0x1f/0xb1a
this appears to be the same one as the mc one I just looked at.
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more rc1 lockdep fun.
===
[ INFO: possible circular locking dependency detected ]
---
gnome-settings-/3278 is trying to acquire lock:
(sk_lock-AF_INET){--..}, at: [8022800c] tcp_sendmsg+0x1f/0xb1a
but task is already holding lock:
(inode-i_mutex){--..}, at: [802692e0] mutex_lock+0x2a/0x2e
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
- #2 (inode-i_mutex){--..}:
[802ab6d5] lock_acquire+0x4a/0x69
[80269102] __mutex_lock_slowpath+0xeb/0x29f
[802692df] mutex_lock+0x29/0x2e
[8030f4a0] create_dir+0x2c/0x1e2
[8030fa5b] sysfs_create_dir+0x59/0x78
[8034d2e2] kobject_add+0x114/0x1d8
[803bb1e7] class_device_add+0xb5/0x49d
[804300b1] netdev_register_sysfs+0x98/0xa2
[80426f58] register_netdevice+0x28c/0x376
[8042709c] register_netdev+0x5a/0x69
[8098aa12] loopback_init+0x4e/0x53
[8098a918] net_olddevs_init+0xb/0xb7
[80270918] init+0x177/0x348
[80263cdd] child_rip+0x7/0x12
- #1 (rtnl_mutex){--..}:
[802ab6d5] lock_acquire+0x4a/0x69
[80269102] __mutex_lock_slowpath+0xeb/0x29f
[802692df] mutex_lock+0x29/0x2e
[8042e0a2] rtnl_lock+0xf/0x12
[8045c7b8] ip_mc_leave_group+0x1e/0xae
[804467f7] do_ip_setsockopt+0x6ad/0x9b2
[80446baa] ip_setsockopt+0x2a/0x84
[80454a55] udp_setsockopt+0xd/0x1c
[8041f7ea] sock_common_setsockopt+0xe/0x11
[8041e965] sys_setsockopt+0x8e/0xb4
[80262f19] tracesys+0xd0/0xdb
- #0 (sk_lock-AF_INET){--..}:
[802ab6d5] lock_acquire+0x4a/0x69
[802371ea] lock_sock+0xd4/0xe7
[8022800b] tcp_sendmsg+0x1e/0xb1a
[80248f4b] inet_sendmsg+0x45/0x53
[80259d25] sock_sendmsg+0x110/0x130
[8041f462] kernel_sendmsg+0x3c/0x52
[885359e9] xs_tcp_send_request+0x117/0x320 [sunrpc]
[885348d5] xprt_transmit+0x105/0x21e [sunrpc]
[8853371e] call_transmit+0x1f4/0x239 [sunrpc]
[8853806e] __rpc_execute+0x9b/0x1e6 [sunrpc]
[885381de] rpc_execute+0x1a/0x1d [sunrpc]
[885324ad] rpc_call_sync+0x87/0xb9 [sunrpc]
[8859e587] nfs3_rpc_wrapper+0x2e/0x74 [nfs]
[8859ea14] nfs3_proc_lookup+0xe0/0x163 [nfs]
[88590b10] nfs_lookup+0xef/0x1d6 [nfs]
[8020d300] do_lookup+0xd0/0x18c
[802098b6] __link_path_walk+0x3b8/0xf7d
[8020f076] link_path_walk+0x69/0x101
[8020d096] do_path_lookup+0x27b/0x2e7
[802258da] __user_walk_fd+0x40/0x5c
[802360f7] sys_faccessat+0xf3/0x1aa
[802e08a5] sys_access+0x12/0x15
[80262f19] tracesys+0xd0/0xdb
other info that might help us debug this:
1 lock held by gnome-settings-/3278:
#0: (inode-i_mutex){--..}, at: [802692e0] mutex_lock+0x2a/0x2e
stack backtrace:
Call Trace:
[80271910] show_trace+0xaa/0x23d
[80271ab8] dump_stack+0x15/0x17
[802a992f] print_circular_bug_tail+0x6c/0x77
[802aaf34] __lock_acquire+0x853/0xa54
[802ab6d6] lock_acquire+0x4b/0x69
[802371eb] lock_sock+0xd5/0xe7
[8022800c] tcp_sendmsg+0x1f/0xb1a
[80248f4c] inet_sendmsg+0x46/0x53
[80259d26] sock_sendmsg+0x111/0x130
[8041f463] kernel_sendmsg+0x3d/0x52
[885359ea] :sunrpc:xs_tcp_send_request+0x118/0x320
[885348d6] :sunrpc:xprt_transmit+0x106/0x21e
[8853371f] :sunrpc:call_transmit+0x1f5/0x239
[8853806f] :sunrpc:__rpc_execute+0x9c/0x1e6
[885381df] :sunrpc:rpc_execute+0x1b/0x1d
[885324ae] :sunrpc:rpc_call_sync+0x88/0xb9
[8859e588] :nfs:nfs3_rpc_wrapper+0x2f/0x74
[8859ea15] :nfs:nfs3_proc_lookup+0xe1/0x163
[88590b11] :nfs:nfs_lookup+0xf0/0x1d6
[8020d301] do_lookup+0xd1/0x18c
[802098b7] __link_path_walk+0x3b9/0xf7d
[8020f077] link_path_walk+0x6a/0x101
[8020d097] do_path_lookup+0x27c/0x2e7
[802258db] __user_walk_fd+0x41/0x5c
[802360f8] sys_faccessat+0xf4/0x1aa
[802e08a6] sys_access+0x13/0x15
[80262f1a] tracesys+0xd1/0xdb
--
http://www.codemonkey.org.uk
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Re: more rc1 lockdep fun.
From: Arjan van de Ven [EMAIL PROTECTED]
Date: Fri, 07 Jul 2006 21:03:35 +0200
On Fri, 2006-07-07 at 14:58 -0400, Dave Jones wrote:
===
[ INFO: possible circular locking dependency detected ]
---
gnome-settings-/3278 is trying to acquire lock:
(sk_lock-AF_INET){--..}, at: [8022800c] tcp_sendmsg+0x1f/0xb1a
this appears to be the same one as the mc one I just looked at.
This is what I think too, I'll look at Arjan's analysis later this
afternoon.
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