Messages in this thread | | | Date | Thu, 2 May 2013 11:46:21 -0400 | From | Dave Jones <> | Subject | Re: clockevents_program_event WARN_ON preventing boot. |
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On Thu, May 02, 2013 at 12:37:26PM +0200, Thomas Gleixner wrote:
> > On a second machine, I'm seeing an oops even earlier. As soon as I > > exit grub, I get a blinking cursor. If I boot with earlyprintk=vga > > I can see.. > > > > Call Trace: > > <IRQ> > > tick_check_oneshot_broadcast > > tick_check_idle > > irq_enter > > do_IRQ > > common_interrupt > > <EOI> > > x86_64_start_reservations > > x86_64_start_kernel > > RIP: clockevents_set_mode+0x18 > > > > Matching up the Code: line of the trace with the disassembly I see.. > > > > if (dev->mode != mode) { > > 4c8: 39 77 38 cmp %esi,0x38(%rdi) > > > > > > diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c > index 61d00a8..db9da73 100644 > --- a/kernel/time/tick-broadcast.c > +++ b/kernel/time/tick-broadcast.c > @@ -475,7 +475,8 @@ void tick_check_oneshot_broadcast(int cpu) > if (cpumask_test_cpu(cpu, tick_broadcast_oneshot_mask)) { > struct tick_device *td = &per_cpu(tick_cpu_device, cpu); > > - clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_ONESHOT); > + if (td) > + clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_ONESHOT); > } > } >
td must be non-null, because this doesn't change anything.
a clue: If I disable CONFIG_SLUB_DEBUG, or even boot with slub_debug=- then it boots fine.
I'll bisect.
Dave
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