From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Dave Jones <davej@redhat.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dipankar Sarma <dipankar@in.ibm.com>,
linux-kernel@vger.kernel.org
Subject: Re: INFO: possible circular locking dependency detected
Date: Thu, 14 Jul 2011 13:33:36 -0700 [thread overview]
Message-ID: <20110714203336.GB2317@linux.vnet.ibm.com> (raw)
In-Reply-To: <20110714193827.GA11552@redhat.com>
On Thu, Jul 14, 2011 at 03:38:28PM -0400, Dave Jones wrote:
> On Thu, Jul 14, 2011 at 12:34:12PM -0700, Paul E. McKenney wrote:
>
> > Thank you -- you were indeed running with CONFIG_PREEMPT and
> > CONFIG_RCU_BOOST, which would be the case for the bug that Steven Rostedt
> > found. On reproducing, yes, it could be a bit tough, as the race window
> > is rather narrow. I could probably add delays to force the situation htat
> > Steven found, but it would be hard to prove that this is your situation.
> >
> > Dave, was your lockdep splat also with CONFIG_PREEMPT and
> > CONFIG_RCU_BOOST?
>
> yeah. which might explain why I haven't seen it since. (I usually have it
> disabled, but turn it on occasionally for a 'lets see what breaks' test)
OK, thanks for the info. For the time being, I will assume that you
were seeing this same bug.
Thanx, Paul
next prev parent reply other threads:[~2011-07-14 20:33 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-14 14:49 INFO: possible circular locking dependency detected Sergey Senozhatsky
2011-07-14 16:41 ` Peter Zijlstra
2011-07-14 16:57 ` Paul E. McKenney
2011-07-14 19:16 ` Sergey Senozhatsky
2011-07-14 19:15 ` Sergey Senozhatsky
2011-07-14 19:34 ` Paul E. McKenney
2011-07-14 19:38 ` Dave Jones
2011-07-14 20:33 ` Paul E. McKenney [this message]
2011-07-14 19:38 ` Sergey Senozhatsky
2011-07-14 16:58 ` Steven Rostedt
2011-07-14 17:02 ` Steven Rostedt
2011-07-14 17:05 ` Paul E. McKenney
2011-07-14 17:32 ` Steven Rostedt
2011-07-14 17:46 ` Steven Rostedt
2011-07-14 19:18 ` Paul E. McKenney
2011-07-14 19:41 ` Steven Rostedt
2011-07-14 20:33 ` Paul E. McKenney
2011-07-15 11:05 ` Ed Tomlinson
2011-07-15 11:29 ` Peter Zijlstra
2011-07-15 11:35 ` Ed Tomlinson
2011-07-15 11:39 ` Peter Zijlstra
2011-07-15 18:11 ` Paul E. McKenney
2011-07-15 12:42 ` Paul E. McKenney
2011-07-15 13:07 ` Peter Zijlstra
2011-07-15 14:36 ` Paul E. McKenney
2011-07-15 15:04 ` Peter Zijlstra
2011-07-15 15:59 ` Paul E. McKenney
2011-07-15 16:11 ` Peter Zijlstra
2011-07-15 16:56 ` Paul E. McKenney
2011-07-15 21:48 ` Ed Tomlinson
2011-07-15 22:04 ` Paul E. McKenney
2011-07-16 19:42 ` Ed Tomlinson
2011-07-17 0:02 ` Paul E. McKenney
2011-07-17 1:56 ` Ed Tomlinson
2011-07-17 14:28 ` Paul E. McKenney
2011-07-18 15:15 ` Paul E. McKenney
2011-07-18 9:29 ` Peter Zijlstra
2011-07-18 15:29 ` Paul E. McKenney
2011-07-15 16:55 ` Steven Rostedt
2011-07-15 17:03 ` Paul E. McKenney
2011-07-15 17:16 ` Steven Rostedt
2011-07-15 17:24 ` Paul E. McKenney
2011-07-15 17:42 ` Steven Rostedt
2011-07-15 18:33 ` Paul E. McKenney
-- strict thread matches above, loose matches on Subject: below --
2013-11-20 20:15 Alexei Starovoitov
2013-11-20 23:24 ` Casey Schaufler
2011-08-07 16:22 Justin P. Mattock
2011-08-11 20:57 ` Justin P. Mattock
2009-12-06 10:11 Richard Zidlicky
2009-10-10 23:09 John Kacur
2007-02-08 15:03 Pedro M. López
2006-10-16 14:05 alpha @ steudten Engineering
2006-10-16 14:32 ` Nick Piggin
2006-10-16 15:42 ` Randy Dunlap
2006-10-16 15:46 ` Nick Piggin
2006-10-19 6:02 ` Andrew Morton
2006-10-19 6:30 ` Nick Piggin
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