From: Dave Jones <davej@redhat.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: rcu_prempt stalls / lockup
Date: Wed, 2 Apr 2014 12:23:30 -0400 [thread overview]
Message-ID: <20140402162330.GA26759@redhat.com> (raw)
In-Reply-To: <20140402162043.GA11090@linux.vnet.ibm.com>
On Wed, Apr 02, 2014 at 09:20:43AM -0700, Paul E. McKenney wrote:
> On Tue, Apr 01, 2014 at 11:32:45AM -0700, Paul E. McKenney wrote:
> > On Tue, Apr 01, 2014 at 02:04:14PM -0400, Dave Jones wrote:
> > > On Tue, Apr 01, 2014 at 10:55:45AM -0700, Paul E. McKenney wrote:
>
> [ . . . ]
>
> > > > Waiting uninterruptibly. Presumably blocked on mutex_lock(). But
> > > > you have CONFIG_PROVE_LOCKING(), so any deadlocks should have been
> > > > reported.
> > >
> > > Lockdep had reported something a little earlier (timestamped at 1108.xxxxxx)
> > > but that's a known false-positive in xfs.
> >
> > Yep, I would be very surprised if that was related to the grace-period hang.
>
> Ah, but it could be suppressing later lockdep splats. So if this can be
> reproduced without xfs, we might get additional information from lockdep.
Hmm, I lack another test machine, and don't really feel like reinstalling it right now.
I'm halfway through a bisect, hopefully that's fruitful.
Dave
next prev parent reply other threads:[~2014-04-02 16:23 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-31 23:02 rcu_prempt stalls / lockup Dave Jones
2014-03-31 23:22 ` Paul E. McKenney
2014-03-31 23:35 ` Dave Jones
2014-04-01 0:48 ` Paul E. McKenney
2014-04-01 15:08 ` Dave Jones
2014-04-01 15:30 ` Paul E. McKenney
2014-04-01 17:22 ` Dave Jones
2014-04-01 17:55 ` Paul E. McKenney
2014-04-01 18:04 ` Dave Jones
2014-04-01 18:32 ` Paul E. McKenney
2014-04-01 22:16 ` Dave Jones
2014-04-01 23:18 ` Paul E. McKenney
2014-04-01 23:31 ` Dave Jones
2014-04-01 23:57 ` Paul E. McKenney
2014-04-02 0:07 ` Dave Jones
2014-04-02 16:20 ` Paul E. McKenney
2014-04-02 16:23 ` Dave Jones [this message]
2014-04-02 22:48 ` Dave Jones
2014-04-03 20:01 ` Dave Jones
2014-04-03 20:46 ` Paul E. McKenney
2014-04-03 21:44 ` Dave Jones
2014-04-03 22:37 ` Dave Jones
2014-04-04 17:06 ` Paul E. McKenney
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