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Re: perf related lockdep bug

From Andi Kleen <andi@firstfloor.org>
Newsgroups linux.kernel
Subject Re: perf related lockdep bug
Date 2015-11-05 03:50 +0100
Message-ID <qriMF-ys-13@gated-at.bofh.it> (permalink)
References (2 earlier) <qr3ui-7C4-23@gated-at.bofh.it> <qr3Xl-7Mx-31@gated-at.bofh.it> <qr6BP-16g-1@gated-at.bofh.it> <qrdjY-5rI-21@gated-at.bofh.it> <qrh4e-7PW-23@gated-at.bofh.it>
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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.

-Andi
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Thread

perf related lockdep bug Dave Jones <davej@codemonkey.org.uk> - 2015-11-04 06:20 +0100
  Re: perf related lockdep bug Peter Zijlstra <peterz@infradead.org> - 2015-11-04 11:30 +0100
    Re: perf related lockdep bug Peter Zijlstra <peterz@infradead.org> - 2015-11-04 11:30 +0100
      Re: perf related lockdep bug Peter Zijlstra <peterz@infradead.org> - 2015-11-04 12:00 +0100
        Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-04 14:50 +0100
          Re: perf related lockdep bug Peter Zijlstra <peterz@infradead.org> - 2015-11-04 15:30 +0100
            Re: perf related lockdep bug Peter Zijlstra <peterz@infradead.org> - 2015-11-04 16:40 +0100
              Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-04 17:00 +0100
            Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-04 16:40 +0100
          Re: perf related lockdep bug Andi Kleen <andi@firstfloor.org> - 2015-11-04 22:00 +0100
            Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-05 02:00 +0100
              Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-05 03:00 +0100
              Re: perf related lockdep bug Andi Kleen <andi@firstfloor.org> - 2015-11-05 03:50 +0100
                Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-05 15:10 +0100
                Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-11 14:30 +0100
          [tip:perf/urgent] perf:   Disable IRQs across RCU RS CS that acquires scheduler lock "tip-bot for Paul E. McKenney" <tipbot@zytor.com> - 2015-11-10 07:50 +0100
      Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-04 15:10 +0100
        Re: perf related lockdep bug Peter Zijlstra <peterz@infradead.org> - 2015-11-04 15:40 +0100
          Re: perf related lockdep bug "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> - 2015-11-05 03:00 +0100

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