From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Russell King <rmk@arm.linux.org.uk>
Cc: Linux Kernel List <linux-kernel@vger.kernel.org>
Subject: Re: INFO: task rcu_kthread:6 blocked for more than 120 seconds.
Date: Thu, 13 Jan 2011 12:41:35 -0800 [thread overview]
Message-ID: <20110113204135.GK2500@linux.vnet.ibm.com> (raw)
In-Reply-To: <20110113200526.GA31380@flint.arm.linux.org.uk>
On Thu, Jan 13, 2011 at 08:05:26PM +0000, Russell King wrote:
> On Wed, Jan 12, 2011 at 02:22:19PM -0800, Paul E. McKenney wrote:
> > Does the following patch help?
>
> Yes it does, thanks.
>
> Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
>
> > commit 70ce43253a4465211a9c51e33d56a417c759a718
> > Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
> > Date: Wed Jan 12 14:18:11 2011 -0800
> >
> > rcu: avoid pointless blocked-task warnings
> >
> > If the RCU callback-processing kthread has nothing to do, it parks in
> > a wait_event(). If RCU remains idle for more than two minutes, the
> > kernel complains about this. This commit changes from wait_event()
> > to wait_event_interruptible() to prevent the kernel from complaining
> > just because RCU is idle.
> >
> > Reported-by: Russell King <rmk@arm.linux.org.uk>
>
> Please add '+kernel' in there, thanks.
Done! FWIW, I copied the original from my email agent.
Thanx, Paul
prev parent reply other threads:[~2011-01-13 20:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-12 17:43 INFO: task rcu_kthread:6 blocked for more than 120 seconds Russell King
2011-01-12 22:22 ` Paul E. McKenney
2011-01-13 15:17 ` Thomas Weber
2011-01-13 15:42 ` Paul E. McKenney
2011-01-13 20:05 ` Russell King
2011-01-13 20:41 ` Paul E. McKenney [this message]
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