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Message-ID: <20151105140446.GD29027@linux.vnet.ibm.com>
Date: Thu, 5 Nov 2015 06:04:46 -0800
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: Andi Kleen <andi@...stfloor.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
Dave Jones <davej@...emonkey.org.uk>,
Linux Kernel <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...hat.com>,
Stephane Eranian <eranian@...il.com>
Subject: Re: perf related lockdep bug
On Thu, Nov 05, 2015 at 03:46:07AM +0100, Andi Kleen wrote:
> On Wed, Nov 04, 2015 at 04:55:28PM -0800, Paul E. McKenney wrote:
> > On Wed, Nov 04, 2015 at 09:58:36PM +0100, Andi Kleen wrote:
> > >
> > > I tested my perf stress workload with the patch applied on 4.3,
> > > unfortunately got a hang again :-/
> >
> > Any diagnostics, sysrq-T output, or whatever?
>
> The system was dead in the screen saver, no serial console.
> I restarted it and may have some more information tomorrow.
>
> The previous hangs were usually timeout on smp_call_function,
> so one CPU disappeared.
>
> I'll try the extra hunk you pointed out.
Thank you, looking forward to seeing what you get from this.
Thanx, Paul
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