Udo van den Heuvel wrote:
> While copying a small file over to a windows box via cifs, once again I
> got something like this:
Again with 2.6.21.5:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.21.5 #10
-------------------------------------------------------
cp/3480 is trying to acquire lock:
(sk_lock-AF_INET){--..}, at: [<c02c5d45>] tcp_sendmsg+0x16/0x9cc
but task is already holding lock:
(&inode->i_alloc_sem){--..}, at: [<c0167e28>] notify_change+0xe8/0x2d0
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&inode->i_alloc_sem){--..}:
[<c012c0e8>] __lock_acquire+0x9e1/0xb85
[<c012c2f4>] lock_acquire+0x68/0x82
[<c0126503>] down_write+0x3a/0x53
[<c0167e28>] notify_change+0xe8/0x2d0
[<c0154e0e>] do_truncate+0x53/0x6c
[<c015d79c>] may_open+0x1ba/0x202
[<c015f706>] open_namei+0x27f/0x5af
[<c0154b73>] do_filp_open+0x26/0x3b
[<c0154bcb>] do_sys_open+0x43/0xc2
[<c0154c82>] sys_open+0x1c/0x1e
[<c01026a6>] sysenter_past_esp+0x5f/0x99
[<ffffffff>] 0xffffffff
-> #2 (&sysfs_inode_imutex_key){--..}:
[<c012c0e8>] __lock_acquire+0x9e1/0xb85
[<c012c2f4>] lock_acquire+0x68/0x82
[<c02f7d70>] __mutex_lock_slowpath+0xdc/0x266
[<c02f7f16>] mutex_lock+0x1c/0x1f
[<c018c43d>] create_dir+0x20/0x196
[<c018c5fd>] sysfs_create_dir+0x4a/0x64
[<c01d2bf9>] kobject_shadow_add+0xd6/0x189
[<c01d2cb6>] kobject_add+0xa/0xc
[<c0223f21>] device_add+0xae/0x62b
[<c02aaf6f>] netdev_register_sysfs+0x5a/0x5f
[<c02a10ba>] register_netdevice+0x22c/0x2e4
[<c02a220c>] register_netdev+0x40/0x4d
[<c022c160>] rhine_init_one+0x492/0x64f
[<c01e201d>] pci_device_probe+0x39/0x5b
[<c0225e47>] really_probe+0xbd/0x145
[<c0225f64>] driver_probe_device+0x95/0xa1
[<c0226079>] __driver_attach+0x6a/0xa1
[<c022543d>] bus_for_each_dev+0x36/0x5b
[<c0225cbb>] driver_attach+0x19/0x1b
[<c0225724>] bus_add_driver+0x6a/0x170
[<c022628b>] driver_register+0x79/0x7e
[<c01e21a4>] __pci_register_driver+0x7b/0xa8
[<c040a0cf>] rhine_init+0x5d/0x5f
[<c03f271c>] init+0x95/0x17a
[<c01038e7>] kernel_thread_helper+0x7/0x10
[<ffffffff>] 0xffffffff
-> #1 (rtnl_mutex){--..}:
[<c012c0e8>] __lock_acquire+0x9e1/0xb85
[<c012c2f4>] lock_acquire+0x68/0x82
[<c02f7d70>] __mutex_lock_slowpath+0xdc/0x266
[<c02f7f16>] mutex_lock+0x1c/0x1f
[<c02a89af>] rtnl_lock+0xd/0xf
[<c02e0f5d>] ip_mc_join_group+0x2c/0xc9
[<c02c261f>] ip_setsockopt+0x64b/0x9a7
[<c02d7db8>] udp_setsockopt+0x43/0x4a
[<c029a042>] sock_common_setsockopt+0x1e/0x24
[<c029870b>] sys_setsockopt+0x7b/0x97
[<c0299d5d>] sys_socketcall+0x1e8/0x241
[<c01026a6>] sysenter_past_esp+0x5f/0x99
[<ffffffff>] 0xffffffff
-> #0 (sk_lock-AF_INET){--..}:
[<c012bfc9>] __lock_acquire+0x8c2/0xb85
[<c012c2f4>] lock_acquire+0x68/0x82
[<c029a76b>] lock_sock_nested+0xba/0xc7
[<c02c5d45>] tcp_sendmsg+0x16/0x9cc
[<c02dd824>] inet_sendmsg+0x3e/0x49
[<c0298b9b>] sock_sendmsg+0xe7/0x104
[<c0299dde>] kernel_sendmsg+0x28/0x37
[<dec97eba>] smb_send+0x92/0x11c [cifs]
[<dec980c3>] SendReceive+0x17f/0x3dc [cifs]
[<dec87817>] CIFSSMBSetEOF+0x1e6/0x229 [cifs]
[<dec934dd>] cifs_setattr+0x25d/0x900 [cifs]
[<c0167e70>] notify_change+0x130/0x2d0
[<c0154e0e>] do_truncate+0x53/0x6c
[<c015d79c>] may_open+0x1ba/0x202
[<c015f706>] open_namei+0x27f/0x5af
[<c0154b73>] do_filp_open+0x26/0x3b
[<c0154bcb>] do_sys_open+0x43/0xc2
[<c0154c82>] sys_open+0x1c/0x1e
[<c01026a6>] sysenter_past_esp+0x5f/0x99
[<ffffffff>] 0xffffffff
other info that might help us debug this:
2 locks held by cp/3480:
#0: (&inode->i_mutex){--..}, at: [<c02f7f16>] mutex_lock+0x1c/0x1f
#1: (&inode->i_alloc_sem){--..}, at: [<c0167e28>] notify_change+0xe8/0x2d0
stack backtrace:
[<c0103c43>] show_trace_log_lvl+0x1a/0x2f
[<c01042bc>] show_trace+0x12/0x14
[<c0104359>] dump_stack+0x16/0x18
[<c012a801>] print_circular_bug_tail+0x5f/0x68
[<c012bfc9>] __lock_acquire+0x8c2/0xb85
[<c012c2f4>] lock_acquire+0x68/0x82
[<c029a76b>] lock_sock_nested+0xba/0xc7
[<c02c5d45>] tcp_sendmsg+0x16/0x9cc
[<c02dd824>] inet_sendmsg+0x3e/0x49
[<c0298b9b>] sock_sendmsg+0xe7/0x104
[<c0299dde>] kernel_sendmsg+0x28/0x37
[<dec97eba>] smb_send+0x92/0x11c [cifs]
[<dec980c3>] SendReceive+0x17f/0x3dc [cifs]
[<dec87817>] CIFSSMBSetEOF+0x1e6/0x229 [cifs]
[<dec934dd>] cifs_setattr+0x25d/0x900 [cifs]
[<c0167e70>] notify_change+0x130/0x2d0
[<c0154e0e>] do_truncate+0x53/0x6c
[<c015d79c>] may_open+0x1ba/0x202
[<c015f706>] open_namei+0x27f/0x5af
[<c0154b73>] do_filp_open+0x26/0x3b
[<c0154bcb>] do_sys_open+0x43/0xc2
[<c0154c82>] sys_open+0x1c/0x1e
[<c01026a6>] sysenter_past_esp+0x5f/0x99
=======================
pwc: Too many ISOC errors, bailing out.
pwc: Too many ISOC errors, bailing out.
pwc: Too many ISOC errors, bailing out.
pwc: Too many ISOC errors, bailing out.
pwc: Too many ISOC errors, bailing out.
pwc: Too many ISOC errors, bailing out.
> How can this be fixed?
> Afterwards nut (ups tool) is slightly upset.
requiring reboot to fix. (restart of nut is no solution!)
Udo
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