From: Valdis.Kletnieks@vt.edu
To: Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Subject: mmotm 2010-08-11 - RCU whinge during very early boot
Date: Thu, 12 Aug 2010 12:18:07 -0400 [thread overview]
Message-ID: <10167.1281629887@localhost> (raw)
In-Reply-To: Your message of "Wed, 11 Aug 2010 16:10:49 PDT." <201008112340.o7BNenDe021017@imap1.linux-foundation.org>
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On Wed, 11 Aug 2010 16:10:49 PDT, akpm@linux-foundation.org said:
> The mm-of-the-moment snapshot 2010-08-11-16-10 has been uploaded to
>
> http://userweb.kernel.org/~akpm/mmotm/
Throws a RCU complaint. Hopefully somebody on the cc: list knows what it is about...
[ 0.026136] CPU0: Intel(R) Core(TM)2 Duo CPU P8700 @ 2.53GHz stepping 0a
[ 0.028399] NMI watchdog enabled, takes one hw-pmu counter.
[ 0.030019] lockdep: fixing up alternatives.
[ 0.031178]
[ 0.031179] ===================================================
[ 0.031182] [ INFO: suspicious rcu_dereference_check() usage. ]
[ 0.031184] ---------------------------------------------------
[ 0.031187] kernel/sched.c:618 invoked rcu_dereference_check() without protection!
[ 0.031189]
[ 0.031189] other info that might help us debug this:
[ 0.031190]
[ 0.031192]
[ 0.031193] rcu_scheduler_active = 1, debug_locks = 1
[ 0.031195] 3 locks held by kworker/0:0/4:
[ 0.031197] #0: (events){+.+.+.}, at: [<ffffffff810504ca>] process_one_work+0x1b6/0x37d
[ 0.031210] #1: ((&c_idle.work)){+.+.+.}, at: [<ffffffff810504ca>] process_one_work+0x1b6/0x37d
[ 0.031217] #2: (&rq->lock){-.-...}, at: [<ffffffff81b5f9b8>] init_idle+0x2b/0x114
[ 0.031225]
[ 0.031226] stack backtrace:
[ 0.031229] Pid: 4, comm: kworker/0:0 Not tainted 2.6.35-mmotm0811 #1
[ 0.031232] Call Trace:
[ 0.031237] [<ffffffff810661eb>] lockdep_rcu_dereference+0x9d/0xa5
[ 0.031242] [<ffffffff8102b751>] task_group+0x7b/0x8a
[ 0.031246] [<ffffffff81b5f9b8>] ? init_idle+0x2b/0x114
[ 0.031250] [<ffffffff8102b775>] set_task_rq+0x15/0x6e
[ 0.031253] [<ffffffff81b5fa5e>] init_idle+0xd1/0x114
[ 0.031257] [<ffffffff81b5fb44>] fork_idle+0x8e/0x9d
[ 0.031261] [<ffffffff81b5de6f>] do_fork_idle+0x17/0x28
[ 0.031265] [<ffffffff8105052b>] process_one_work+0x217/0x37d
[ 0.031269] [<ffffffff810504ca>] ? process_one_work+0x1b6/0x37d
[ 0.031273] [<ffffffff81b5de58>] ? do_fork_idle+0x0/0x28
[ 0.031277] [<ffffffff81051775>] worker_thread+0x17e/0x251
[ 0.031281] [<ffffffff810515f7>] ? worker_thread+0x0/0x251
[ 0.031285] [<ffffffff8105544a>] kthread+0x7d/0x85
[ 0.031290] [<ffffffff81003554>] kernel_thread_helper+0x4/0x10
[ 0.031295] [<ffffffff81558d80>] ? restore_args+0x0/0x30
[ 0.031299] [<ffffffff810553cd>] ? kthread+0x0/0x85
[ 0.031303] [<ffffffff81003550>] ? kernel_thread_helper+0x0/0x10
[ 0.031333] Booting Node 0, Processors #1 Ok.
[ 0.103111] NMI watchdog enabled, takes one hw-pmu counter.
[ 0.104013] Brought up 2 CPUs
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next prev parent reply other threads:[~2010-08-12 16:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-11 23:10 mmotm 2010-08-11-16-10 uploaded akpm
2010-08-12 16:18 ` Valdis.Kletnieks [this message]
2010-08-16 17:23 ` mmotm 2010-08-11 - RCU whinge during very early boot Paul E. McKenney
2010-10-05 10:05 ` Zdenek Kabelac
2010-10-06 23:04 ` Paul E. McKenney
2010-10-06 23:18 ` Ben Greear
2010-10-18 12:26 ` Zdenek Kabelac
2010-11-07 18:46 ` Paul E. McKenney
2010-08-12 16:36 ` [PATCH] mmc: fix for CONFIG_PM disabled Randy Dunlap
2010-08-18 9:10 ` Uwe Kleine-König
2010-08-12 16:37 ` mmotm 2010-08-11 - lockdep whinges at e1000e driver ifconfig up Valdis.Kletnieks
2010-08-12 18:59 ` mmotm 2010-08-11 - audio volume issues Valdis.Kletnieks
2010-08-12 19:37 ` Takashi Iwai
2010-08-12 21:06 ` Jiri Slaby
2010-08-12 21:11 ` Takashi Iwai
2010-08-13 2:13 ` Valdis.Kletnieks
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