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Red Hat Bugzilla – Attachment 196301 Details for
Bug 280311
circular locking in NLM subsystem
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kernel log
lockd.txt (text/plain), 5.48 KB, created by
Kenneth Johansson
on 2007-09-15 02:08:54 UTC
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Description:
kernel log
Filename:
MIME Type:
Creator:
Kenneth Johansson
Created:
2007-09-15 02:08:54 UTC
Size:
5.48 KB
patch
obsolete
> >[1728898.928667] ======================= >[1728898.928711] lockd D 00000002 4840 2432 2 (L-TLB) >[1728898.928853] e8b91cec 00000046 00000000 00000002 e8b91cd4 c027d948 350fee32 00000046 >[1728898.929134] 00000246 59054ceb 00061f12 00005fb5 e62eb38c eef79660 e62eb3b8 e8b91ce0 >[1728898.929452] e62eb38c e62eb360 e62eb38c e62eb360 e62eb3b8 e8b91d24 c03365eb e62eb54c >[1728898.929771] Call Trace: >[1728898.929849] [<c03365eb>] lock_sock_nested+0x8b/0xf0 >[1728898.929924] [<c0379d2d>] udp_destroy_sock+0xd/0x20 >[1728898.929999] [<c0336d03>] sk_common_release+0x13/0xa0 >[1728898.930075] [<c03791d8>] udp_lib_close+0x8/0x10 >[1728898.930149] [<c03811e7>] inet_release+0x37/0x60 >[1728898.930224] [<c033490b>] sock_release+0x1b/0x70 >[1728898.930298] [<c039f09f>] xs_close+0x8f/0xc0 >[1728898.930374] [<c039f10c>] xs_destroy+0x3c/0x90 >[1728898.930449] [<c039d54c>] xprt_destroy+0x2c/0x50 >[1728898.930524] [<c026cc8b>] kref_put+0x2b/0x90 >[1728898.930600] [<c039d48d>] xprt_put+0xd/0x10 >[1728898.930675] [<c039c3e3>] rpc_destroy_client+0x83/0xd0 >[1728898.930750] [<c039c47a>] rpc_release_client+0x4a/0x70 >[1728898.930825] [<c03a11ab>] rpc_put_task+0x4b/0x80 >[1728898.930900] [<c039c204>] rpc_call_sync+0x74/0xa0 >[1728898.930975] [<c0242d18>] nsm_mon_unmon+0xf8/0x130 >[1728898.931051] [<c0242e2f>] nsm_monitor+0x3f/0xa0 >[1728898.931125] [<c02450e3>] nlm4svc_retrieve_args+0xb3/0xd0 >[1728898.931202] [<c0245607>] nlm4svc_proc_lock+0x57/0x110 >[1728898.931278] [<c03a4740>] svc_process+0x680/0x730 >[1728898.931355] [<c0240166>] lockd+0x106/0x240 >[1728898.931434] [<c0104b43>] kernel_thread_helper+0x7/0x14 >[1728898.931509] ======================= > > >--------------------------------------------------------------------------- >[ 369.860677] ======================================================= >[ 369.860771] [ INFO: possible circular locking dependency detected ] >[ 369.860819] 2.6.22.3 #7 >[ 369.860861] ------------------------------------------------------- >[ 369.860908] lockd/2432 is trying to acquire lock: >[ 369.860953] (&file->f_mutex){--..}, at: [<c03b723c>] mutex_lock+0x1c/0x20 >[ 369.861125] >[ 369.861126] but task is already holding lock: >[ 369.861207] (nlm_host_mutex){--..}, at: [<c03b723c>] mutex_lock+0x1c/0x20 >[ 369.861372] >[ 369.861373] which lock already depends on the new lock. >[ 369.861375] >[ 369.861494] >[ 369.861495] the existing dependency chain (in reverse order) is: >[ 369.861579] >[ 369.861580] -> #1 (nlm_host_mutex){--..}: >[ 369.861748] [<c0135d4d>] __lock_acquire+0xdad/0xf60 >[ 369.862028] [<c0135f55>] lock_acquire+0x55/0x70 >[ 369.862305] [<c03b6ff9>] __mutex_lock_slowpath+0x69/0x290 >[ 369.862583] [<c03b723c>] mutex_lock+0x1c/0x20 >[ 369.862858] [<c023f561>] nlm_lookup_host+0x31/0x310 >[ 369.863142] [<c023f874>] nlmsvc_lookup_host+0x34/0x40 >[ 369.863419] [<c02414b5>] nlmsvc_lock+0x125/0x360 >[ 369.863696] [<c024562c>] nlm4svc_proc_lock+0x7c/0x110 >[ 369.863976] [<c03a4740>] svc_process+0x680/0x730 >[ 369.864257] [<c0240166>] lockd+0x106/0x240 >[ 369.864534] [<c0104b43>] kernel_thread_helper+0x7/0x14 >[ 369.864813] [<ffffffff>] 0xffffffff >[ 369.865092] >[ 369.865093] -> #0 (&file->f_mutex){--..}: >[ 369.865261] [<c0135bc7>] __lock_acquire+0xc27/0xf60 >[ 369.865538] [<c0135f55>] lock_acquire+0x55/0x70 >[ 369.865813] [<c03b6ff9>] __mutex_lock_slowpath+0x69/0x290 >[ 369.866090] [<c03b723c>] mutex_lock+0x1c/0x20 >[ 369.866365] [<c02411c9>] nlmsvc_traverse_blocks+0x29/0xa0 >[ 369.866644] [<c02425fe>] nlm_traverse_files+0x6e/0x210 >[ 369.866920] [<c024282b>] nlmsvc_mark_resources+0x1b/0x30 >[ 369.867197] [<c023f02e>] nlm_gc_hosts+0x4e/0x1e0 >[ 369.867473] [<c023f576>] nlm_lookup_host+0x46/0x310 >[ 369.867750] [<c023f874>] nlmsvc_lookup_host+0x34/0x40 >[ 369.868027] [<c024506b>] nlm4svc_retrieve_args+0x3b/0xd0 >[ 369.868304] [<c0245607>] nlm4svc_proc_lock+0x57/0x110 >[ 369.868580] [<c03a4740>] svc_process+0x680/0x730 >[ 369.868856] [<c0240166>] lockd+0x106/0x240 >[ 369.869132] [<c0104b43>] kernel_thread_helper+0x7/0x14 >[ 369.869408] [<ffffffff>] 0xffffffff >[ 369.869682] >[ 369.869683] other info that might help us debug this: >[ 369.869685] >[ 369.869806] 1 lock held by lockd/2432: >[ 369.869848] #0: (nlm_host_mutex){--..}, at: [<c03b723c>] mutex_lock+0x1c/0x20 >[ 369.870050] >[ 369.870051] stack backtrace: >[ 369.870132] [<c0104eca>] show_trace_log_lvl+0x1a/0x30 >[ 369.870207] [<c0105a02>] show_trace+0x12/0x20 >[ 369.870282] [<c0105a75>] dump_stack+0x15/0x20 >[ 369.870357] [<c0133d6c>] print_circular_bug_tail+0x6c/0x80 >[ 369.870433] [<c0135bc7>] __lock_acquire+0xc27/0xf60 >[ 369.870508] [<c0135f55>] lock_acquire+0x55/0x70 >[ 369.870582] [<c03b6ff9>] __mutex_lock_slowpath+0x69/0x290 >[ 369.870658] [<c03b723c>] mutex_lock+0x1c/0x20 >[ 369.870732] [<c02411c9>] nlmsvc_traverse_blocks+0x29/0xa0 >[ 369.870808] [<c02425fe>] nlm_traverse_files+0x6e/0x210 >[ 369.870883] [<c024282b>] nlmsvc_mark_resources+0x1b/0x30 >[ 369.870959] [<c023f02e>] nlm_gc_hosts+0x4e/0x1e0 >[ 369.871034] [<c023f576>] nlm_lookup_host+0x46/0x310 >[ 369.871109] [<c023f874>] nlmsvc_lookup_host+0x34/0x40 >[ 369.871185] [<c024506b>] nlm4svc_retrieve_args+0x3b/0xd0 >[ 369.871261] [<c0245607>] nlm4svc_proc_lock+0x57/0x110 >[ 369.871336] [<c03a4740>] svc_process+0x680/0x730 >[ 369.871411] [<c0240166>] lockd+0x106/0x240 >[ 369.871486] [<c0104b43>] kernel_thread_helper+0x7/0x14 >[
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