From owner-freebsd-stable@FreeBSD.ORG  Wed Aug 17 18:26:15 2011
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Date: Wed, 17 Aug 2011 14:26:16 -0400
From: Mike Tancsa <mike@sentex.net>
Organization: Sentex Communications
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To: Hiroki Sato <hrs@FreeBSD.org>
References: <20110707082027.GX48734@deviant.kiev.zoral.com.ua>	<4E159959.2070401@sentex.net>	<4E15A08C.6090407@sentex.net>
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Cc: kostikbel@gmail.com, freebsd-stable@FreeBSD.org, avg@FreeBSD.org
Subject: Re: panic: spin lock held too long (RELENG_8 from today)
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On 8/17/2011 1:38 PM, Hiroki Sato wrote:
>  Any progress on the investigation?

Unfortunately, I cannot reproduce it yet with a debugging kernel :(


	---Mike

> 
> --
> spin lock 0xffffffff80cb46c0 (sched lock 0) held by 0xffffff01900458c0 (tid 100489) too long
> panic: spin lock held too long
> cpuid = 1
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
> kdb_backtrace() at kdb_backtrace+0x37
> panic() at panic+0x187
> _mtx_lock_spin_failed() at _mtx_lock_spin_failed+0x39
> _mtx_lock_spin() at _mtx_lock_spin+0x9e
> sched_add() at sched_add+0x117
> setrunnable() at setrunnable+0x78
> sleepq_signal() at sleepq_signal+0x7a
> cv_signal() at cv_signal+0x3b
> xprt_active() at xprt_active+0xe3
> svc_vc_soupcall() at svc_vc_soupcall+0xc
> sowakeup() at sowakeup+0x69
> tcp_do_segment() at tcp_do_segment+0x25e7
> tcp_input() at tcp_input+0xcdd
> ip_input() at ip_input+0xac
> netisr_dispatch_src() at netisr_dispatch_src+0x7e
> ether_demux() at ether_demux+0x14d
> ether_input() at ether_input+0x17d
> em_rxeof() at em_rxeof+0x1ca
> em_handle_que() at em_handle_que+0x5b
> taskqueue_run_locked() at taskqueue_run_locked+0x85
> taskqueue_thread_loop() at taskqueue_thread_loop+0x4e
> fork_exit() at fork_exit+0x11f
> fork_trampoline() at fork_trampoline+0xe
> --
> 
> -- Hiroki


-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike@sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/