On Wed, Aug 12, 2020 at 10:18:32AM +0200, pet...@infradead.org wrote: > > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106 > > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074 > > trace_irq_enable_rcuidle+0x87/0x120 > > include/trace/events/preemptirq.h:40 > > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106 > > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074 > > trace_irq_enable_rcuidle+0x87/0x120 > > include/trace/events/preemptirq.h:40 > > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106 > > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074 > > trace_irq_enable_rcuidle+0x87/0x120 > > include/trace/events/preemptirq.h:40 > > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106 > > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074 > > > > <... repeated many many times ...> > > > > trace_irq_enable_rcuidle+0x87/0x120 > > include/trace/events/preemptirq.h:40 > > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106 > > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074 > > Lost 500 message(s)! > > BUG: stack guard page was hit at 00000000cab483ba (stack is > > 00000000b1442365..00000000c26f9ad3) > > BUG: stack guard page was hit at 00000000318ff8d8 (stack is > > 00000000fd87d656..0000000058100136) > > ---[ end trace 4157e0bb4a65941a ]--- > > Wheee... recursion! Let me try and see if I can make something of that.
All that's needed is enabling the preemptirq tracepoints. Lemme go fix.
