From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
Sasha Levin <levinsasha928@gmail.com>,
Ingo Molnar <mingo@elte.hu>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Dave Jones <davej@redhat.com>
Subject: Re: rcu,sched: spinlock recursion on 3.5-rc2
Date: Tue, 12 Jun 2012 08:25:21 -0700 [thread overview]
Message-ID: <20120612152521.GD2423@linux.vnet.ibm.com> (raw)
In-Reply-To: <alpine.LFD.2.02.1206121716370.3086@ionos>
On Tue, Jun 12, 2012 at 05:20:10PM +0200, Thomas Gleixner wrote:
> On Tue, 12 Jun 2012, Peter Zijlstra wrote:
>
> > On Tue, 2012-06-12 at 17:07 +0200, Thomas Gleixner wrote:
> > > Hmm, not sure. The deadlock was not triggered in switch_to. It was
> > > just at the beginning of __schedule()
> > >
> > >
> > How can you tell? switch_to() is a macro not a function, it won't ever
> > show up on a stack-trace.. but I think you meant context_switch() but
> > that typically gets inlined, similar problem.
>
> Bah, I misread the trace and the rcu code. :(
>
> So, yes the revert should solve the problem. Looks like I need more
> coffee, not Paul :)
Well, given that the commit that I reverted was my own, I definitely
needed more of something or another... :-)
Thanx, Paul
next prev parent reply other threads:[~2012-06-12 15:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-12 11:35 rcu,sched: spinlock recursion on 3.5-rc2 Sasha Levin
2012-06-12 13:40 ` Thomas Gleixner
2012-06-12 14:47 ` Paul E. McKenney
2012-06-12 15:07 ` Thomas Gleixner
2012-06-12 15:15 ` Peter Zijlstra
2012-06-12 15:20 ` Thomas Gleixner
2012-06-12 15:25 ` Paul E. McKenney [this message]
2012-06-12 15:31 ` Sasha Levin
2012-06-12 15:22 ` Paul E. McKenney
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