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Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804 assert_clock_updated.isra.62.part.63+0x25/0x27

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* Mike Galbraith <efault@gmx.de> wrote:

> On Mon, 2017-01-30 at 11:59 +0000, Matt Fleming wrote:
> > On Sat, 28 Jan, at 08:21:05AM, Mike Galbraith wrote:
> > > Running Steven's hotplug stress script in tip.today.  Config is
> > > NOPREEMPT, tune for maximum build time (enterprise default-ish).
> > > 
> > > [   75.268049] x86: Booting SMP configuration:
> > > [   75.268052] smpboot: Booting Node 0 Processor 1 APIC 0x2
> > > [   75.279994] smpboot: Booting Node 0 Processor 2 APIC 0x4
> > > [   75.294617] smpboot: Booting Node 0 Processor 4 APIC 0x1
> > > [   75.310698] smpboot: Booting Node 0 Processor 5 APIC 0x3
> > > [   75.359056] smpboot: CPU 3 is now offline
> > > [   75.415505] smpboot: CPU 4 is now offline
> > > [   75.479985] smpboot: CPU 5 is now offline
> > > [   75.550674] ------------[ cut here ]------------
> > > [   75.550678] WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804
> > > assert_clock_updated.isra.62.part.63+0x25/0x27
> > > [   75.550679] rq->clock_update_flags < RQCF_ACT_SKIP
> > 
> > The following patch queued in tip/sched/core should fix this issue:
> 
> Weeell, I'll have to take your word for it, as tip g35669bb7fd46 grew
> an early boot brick problem.

That's bad - could you perhaps try to bisect it? All recently queued up patches 
that could cause such problems should be readily bisectable.

The bisection might be faster if you first checked whether 5bf728f02218 works - if 
it does then the bug is in the patches in WIP.x86/boot or WIP.x86/fpu.

Thanks,

	Ingo

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WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Mike Galbraith <efault@gmx.de> - 2017-01-28 08:30 +0100
  Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Matt Fleming <matt@codeblueprint.co.uk> - 2017-01-30 13:10 +0100
    Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Mike Galbraith <efault@gmx.de> - 2017-01-31 07:30 +0100
      Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Ingo Molnar <mingo@kernel.org> - 2017-01-31 08:30 +0100
        Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Mike Galbraith <efault@gmx.de> - 2017-01-31 08:40 +0100
          Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Ingo Molnar <mingo@kernel.org> - 2017-01-31 08:50 +0100
            Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Mike Galbraith <efault@gmx.de> - 2017-01-31 09:20 +0100
        Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Mike Galbraith <efault@gmx.de> - 2017-01-31 10:00 +0100
          Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Ingo Molnar <mingo@kernel.org> - 2017-01-31 10:00 +0100
            Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Mike Galbraith <efault@gmx.de> - 2017-01-31 12:20 +0100
              Re: WARNING: CPU: 1 PID: 15 at kernel/sched/sched.h:804  assert_clock_updated.isra.62.part.63+0x25/0x27 Ingo Molnar <mingo@kernel.org> - 2017-01-31 17:30 +0100

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