linux-kernel - Re: [PATCH 0/5] [GIT PULL] updates for tip/tracing/ftrace

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Message-ID: <20090320191926.GJ6698@linux.vnet.ibm.com>
Date:	Fri, 20 Mar 2009 12:19:26 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 0/5] [GIT PULL] updates for tip/tracing/ftrace

On Fri, Mar 20, 2009 at 07:38:49PM +0100, Ingo Molnar wrote:
> 
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > > > This looks like it is RCU/stop_machine related. The CPU is 
> > > > stuck in in stop_machine? I see that rcu_torture is running. 
> > > > Does this go away if you turn off rcu_torture?
> > > 
> > > Grasping at straws...  Does Lai's rcu_barrier() fix help?
> > 
> > which one is that?
> 
> ok, found it. Will know in about ~24 hours whether it helps.

http://lkml.org/lkml/2009/3/20/71 was the one I was thinking of, just
to double-check.

							Thanx, Paul
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