[Lustre-discuss] Watchdog triggered for pid 5383: it was inactive for 100s (+ stack trace)

[Hendelman, Rob]

Is this something to be concerned about?  We have quite a few of these.  This is on our mgs/mds box.

Our mgs/mds aren't in one filesystem (separate spindles with separate spindles for journals as well), but are on the same box.

Thanks,

Robert

***

Lustre: 0:0:(linux-debug.c:168:libcfs_debug_dumpstack()) showing stack for process 5383
ll_mdt_13     D ffff81052a1b2d40     0  5383      1          5384  5382 (L-TLB)
 ffff810528c256c0 0000000000000046 ffff81000100c400 0000000000000282
 000000000000000a ffff81052dac1100 ffffffff802dcae0 001ca31dee07f389
 0000000000007c00 ffff81052dac12e8 5a5a5a5a00000000 ffff81052f764770
Call Trace:
 [<ffffffff800610a0>] wait_for_completion+0x74/0x9d
 [<ffffffff80088431>] default_wake_function+0x0/0xe
 [<ffffffff80097e35>] call_usermodehelper_keys+0xea/0xff
 [<ffffffff80097e4a>] __call_usermodehelper+0x0/0x4f
 [<ffffffff884065af>] :lvfs:upcall_cache_get_entry+0x5bf/0xa50
 [<ffffffff8009b3c6>] autoremove_wake_function+0x9/0x2e
 [<ffffffff800868b0>] __wake_up_common+0x3e/0x68
 [<ffffffff8851b36b>] :ptlrpc:lustre_msg_string+0x18b/0x2f0
 [<ffffffff887587f5>] :mds:mds_init_ucred+0x95/0xd0
 [<ffffffff8872826f>] :mds:mds_getattr_lock+0x34f/0xc70
 [<ffffffff8858f1c4>] :ksocklnd:ksocknal_alloc_tx+0x1c4/0x270
 [<ffffffff8851d00b>] :ptlrpc:lustre_pack_reply+0x9ab/0xab0
 [<ffffffff88729161>] :mds:mds_intent_policy+0x5d1/0xbe0
 [<ffffffff88424ca7>] :lnet:lnet_prep_send+0x67/0xb0
 [<ffffffff884e9776>] :ptlrpc:ldlm_resource_putref+0x1b6/0x3b0
 [<ffffffff884e6183>] :ptlrpc:ldlm_lock_enqueue+0xf3/0x5c0
 [<ffffffff884e3bbd>] :ptlrpc:ldlm_lock_create+0x98d/0x9c0
 [<ffffffff88506610>] :ptlrpc:ldlm_server_completion_ast+0x0/0x570
 [<ffffffff88502d50>] :ptlrpc:ldlm_handle_enqueue+0xd90/0x1410
 [<ffffffff88506b80>] :ptlrpc:ldlm_server_blocking_ast+0x0/0x690
 [<ffffffff88732c6d>] :mds:mds_handle+0x46dd/0x58ff
 [<ffffffff88481c82>] :obdclass:class_handle2object+0xd2/0x160
 [<ffffffff8851d230>] :ptlrpc:lustre_swab_ptlrpc_body+0x0/0x90
 [<ffffffff8851ade5>] :ptlrpc:lustre_swab_buf+0xc5/0xf0
 [<ffffffff88522a3b>] :ptlrpc:ptlrpc_server_handle_request+0xb0b/0x1270
 [<ffffffff80060f29>] thread_return+0x0/0xeb
 [<ffffffff8006b6c9>] do_gettimeofday+0x50/0x92
 [<ffffffff883db056>] :libcfs:lcw_update_time+0x16/0x100
 [<ffffffff8003ce86>] lock_timer_base+0x1b/0x3c
 [<ffffffff8852547c>] :ptlrpc:ptlrpc_main+0x7dc/0x950
 [<ffffffff80088431>] default_wake_function+0x0/0xe
 [<ffffffff8005bfb1>] child_rip+0xa/0x11
 [<ffffffff88524ca0>] :ptlrpc:ptlrpc_main+0x0/0x950
 [<ffffffff8005bfa7>] child_rip+0x0/0x11

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