From: Folkert van Heusden <folkert@vanheusden.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Parag Warudkar <parag.warudkar@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: [2.6.21.1] soft lockup when removing netconsole module
Date: Sat, 26 May 2007 18:17:00 +0200 [thread overview]
Message-ID: <20070526161645.GA11760@vanheusden.com> (raw)
In-Reply-To: <1180195927.4264.11.camel@chaos>
> > Seems to be hrtimers related - CC'ed Thomas.
> I doubt that. The tick interrupt just finds out, that the machine is
> stuck in rmmod.
> > > Also the rmmod hangs and would not exit even with kill -9. It also
> > > sucks up 100% cpu.
> Can you please enable CONFIG_PROVE_LOCKING ?
Luckily I already had :-)
Here is its output:
[ 44.500182] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 44.500228] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 44.500266] ... MAX_LOCK_DEPTH: 30
[ 44.500305] ... MAX_LOCKDEP_KEYS: 2048
[ 44.500343] ... CLASSHASH_SIZE: 1024
[ 44.500383] ... MAX_LOCKDEP_ENTRIES: 8192
[ 44.500421] ... MAX_LOCKDEP_CHAINS: 16384
[ 44.500459] ... CHAINHASH_SIZE: 8192
[ 44.500498] memory used by lock dependency info: 1096 kB
[ 44.500537] per task-struct memory footprint: 1200 bytes
[ 44.500576] ------------------------
[ 44.500614] | Locking API testsuite:
[ 44.500651] ----------------------------------------------------------------------------
[ 44.500697] | spin |wlock |rlock |mutex | wsem | rsem |
[ 44.500743] --------------------------------------------------------------------------
[ 44.500794] A-A deadlock: ok | ok | ok | ok | ok | ok |
[ 44.501739] A-B-B-A deadlock: ok | ok | ok | ok | ok | ok |
[ 44.502675] A-B-B-C-C-A deadlock: ok | ok | ok | ok | ok | ok |
[ 44.503617] A-B-C-A-B-C deadlock: ok | ok | ok | ok | ok | ok |
[ 44.504557] A-B-B-C-C-D-D-A deadlock: ok | ok | ok | ok | ok | ok |
[ 44.505509] A-B-C-D-B-D-D-A deadlock: ok | ok | ok | ok | ok | ok |
[ 44.506469] A-B-C-D-B-C-D-A deadlock: ok | ok | ok | ok | ok | ok |
[ 44.507424] double unlock: ok | ok | ok | ok | ok | ok |
[ 44.508327] initialize held: ok | ok | ok | ok | ok | ok |
[ 44.509245] bad unlock order: ok | ok | ok | ok | ok | ok |
[ 44.510197] --------------------------------------------------------------------------
[ 44.510243] recursive read-lock: | ok | | ok |
[ 44.510656] recursive read-lock #2: | ok | | ok |
[ 44.511069] mixed read-write-lock: | ok | | ok |
[ 44.511507] mixed write-read-lock: | ok | | ok |
[ 44.511968] --------------------------------------------------------------------------
[ 44.512015] hard-irqs-on + irq-safe-A/12: ok | ok | ok |
[ 44.512501] soft-irqs-on + irq-safe-A/12: ok | ok | ok |
[ 44.512998] hard-irqs-on + irq-safe-A/21: ok | ok | ok |
[ 44.513484] soft-irqs-on + irq-safe-A/21: ok | ok | ok |
[ 44.513970] sirq-safe-A => hirqs-on/12: ok | ok | ok |
[ 44.514456] sirq-safe-A => hirqs-on/21: ok | ok | ok |
[ 44.514941] hard-safe-A + irqs-on/12: ok | ok | ok |
[ 44.515425] soft-safe-A + irqs-on/12: ok | ok | ok |
[ 44.515910] hard-safe-A + irqs-on/21: ok | ok | ok |
[ 44.516396] soft-safe-A + irqs-on/21: ok | ok | ok |
[ 44.516882] hard-safe-A + unsafe-B #1/123: ok | ok | ok |
[ 44.517380] soft-safe-A + unsafe-B #1/123: ok | ok | ok |
[ 44.517924] hard-safe-A + unsafe-B #1/132: ok | ok | ok |
[ 44.518417] soft-safe-A + unsafe-B #1/132: ok | ok | ok |
[ 44.518909] hard-safe-A + unsafe-B #1/213: ok | ok | ok |
[ 44.519402] soft-safe-A + unsafe-B #1/213: ok | ok | ok |
[ 44.519896] hard-safe-A + unsafe-B #1/231: ok | ok | ok |
[ 44.520388] soft-safe-A + unsafe-B #1/231: ok | ok | ok |
[ 44.520881] hard-safe-A + unsafe-B #1/312: ok | ok | ok |
[ 44.521388] soft-safe-A + unsafe-B #1/312: ok | ok | ok |
[ 44.521886] hard-safe-A + unsafe-B #1/321: ok | ok | ok |
[ 44.522389] soft-safe-A + unsafe-B #1/321: ok | ok | ok |
[ 44.522907] hard-safe-A + unsafe-B #2/123: ok | ok | ok |
[ 44.523402] soft-safe-A + unsafe-B #2/123: ok | ok | ok |
[ 44.523894] hard-safe-A + unsafe-B #2/132: ok | ok | ok |
[ 44.524387] soft-safe-A + unsafe-B #2/132: ok | ok | ok |
[ 44.524880] hard-safe-A + unsafe-B #2/213: ok | ok | ok |
[ 44.525373] soft-safe-A + unsafe-B #2/213: ok | ok | ok |
[ 44.525866] hard-safe-A + unsafe-B #2/231: ok | ok | ok |
[ 44.526359] soft-safe-A + unsafe-B #2/231: ok | ok | ok |
[ 44.526850] hard-safe-A + unsafe-B #2/312: ok | ok | ok |
[ 44.527342] soft-safe-A + unsafe-B #2/312: ok | ok | ok |
[ 44.527842] hard-safe-A + unsafe-B #2/321: ok | ok | ok |
[ 44.528382] soft-safe-A + unsafe-B #2/321: ok | ok | ok |
[ 44.529025] hard-irq lock-inversion/123: ok | ok | ok |
[ 44.529516] soft-irq lock-inversion/123: ok | ok | ok |
[ 44.530010] hard-irq lock-inversion/132: ok | ok | ok |
[ 44.530501] soft-irq lock-inversion/132: ok | ok | ok |
[ 44.530995] hard-irq lock-inversion/213: ok | ok | ok |
[ 44.531488] soft-irq lock-inversion/213: ok | ok | ok |
[ 44.531980] hard-irq lock-inversion/231: ok | ok | ok |
[ 44.532470] soft-irq lock-inversion/231: ok | ok | ok |
[ 44.532962] hard-irq lock-inversion/312: ok | ok | ok |
[ 44.533478] soft-irq lock-inversion/312: ok | ok | ok |
[ 44.533998] hard-irq lock-inversion/321: ok | ok | ok |
[ 44.534515] soft-irq lock-inversion/321: ok | ok | ok |
[ 44.535017] hard-irq read-recursion/123: ok |
[ 44.535227] soft-irq read-recursion/123: ok |
[ 44.535440] hard-irq read-recursion/132: ok |
[ 44.535652] soft-irq read-recursion/132: ok |
[ 44.535865] hard-irq read-recursion/213: ok |
[ 44.536079] soft-irq read-recursion/213: ok |
[ 44.536291] hard-irq read-recursion/231: ok |
[ 44.536504] soft-irq read-recursion/231: ok |
[ 44.536742] hard-irq read-recursion/312: ok |
[ 44.536979] soft-irq read-recursion/312: ok |
[ 44.537216] hard-irq read-recursion/321: ok |
[ 44.537454] soft-irq read-recursion/321: ok |
[ 44.537693] -------------------------------------------------------
[ 44.537733] Good, all 218 testcases passed! |
[ 44.537774] ---------------------------------
Folkert van Heusden
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next prev parent reply other threads:[~2007-05-26 16:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-26 15:40 [2.6.21.1] soft lockup when removing netconsole module Folkert van Heusden
2007-05-26 15:53 ` Parag Warudkar
2007-05-26 16:12 ` Thomas Gleixner
2007-05-26 16:17 ` Folkert van Heusden [this message]
2007-05-26 16:35 ` Thomas Gleixner
2007-05-26 16:49 ` Folkert van Heusden
2007-05-26 17:06 ` Thomas Gleixner
2007-05-26 17:12 ` Folkert van Heusden
2007-05-27 20:32 ` Matt Mackall
2007-05-29 7:56 ` Andrew Morton
2007-05-30 13:28 ` [PATCH] " Jason Wessel
2007-05-30 20:38 ` Folkert van Heusden
2007-06-12 11:02 ` Jarek Poplawski
2007-06-13 9:25 ` [PATCH] " Jarek Poplawski
2007-06-26 23:07 ` Andrew Morton
2007-06-27 0:46 ` Wessel, Jason
2007-06-27 1:00 ` Andrew Morton
2007-06-27 7:24 ` Jarek Poplawski
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