[Bug 204270] panic: rendezvous action changed td_owepreempt running callout histogram script

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Tue Nov 3 21:37:52 UTC 2015


            Bug ID: 204270
           Summary: panic: rendezvous action changed td_owepreempt running
                    callout histogram script
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: emaste at freebsd.org

Running the script under "Measure total time spent in each callout handler over
1-second intervals" from https://wiki.freebsd.org/DTrace/Examples on the Cavium

panic: rendezvous action changed td_owepreempt
cpuid = 0
KDB: stack backtrace:
db_trace_self() at db_trace_self_wrapper+0x28
         pc = 0xffffff80004d6254  lr = 0xffffff800006d888
         sp = 0xffffff850dcd4580  fp = 0xffffff850dcd46a0

db_trace_self_wrapper() at vpanic+0x170
         pc = 0xffffff800006d888  lr = 0xffffff800025abd0
         sp = 0xffffff850dcd46b0  fp = 0xffffff850dcd4730

vpanic() at kassert_panic+0x160
         pc = 0xffffff800025abd0  lr = 0xffffff800025aa5c
         sp = 0xffffff850dcd4740  fp = 0xffffff850dcd4800

kassert_panic() at ipi_handler+0xd4
         pc = 0xffffff800025aa5c  lr = 0xffffff80004dfbe8
         sp = 0xffffff850dcd4810  fp = 0xffffff850dcd4820

ipi_handler() at intr_event_handle+0x80
         pc = 0xffffff80004dfbe8  lr = 0xffffff8000226b5c
         sp = 0xffffff850dcd4830  fp = 0xffffff850dcd4880

intr_event_handle() at arm_dispatch_intr+0x54
         pc = 0xffffff8000226b5c  lr = 0xffffff80004dca54
         sp = 0xffffff850dcd4890  fp = 0xffffff850dcd48b0

arm_dispatch_intr() at gic_v3_dispatch+0x20
         pc = 0xffffff80004dca54  lr = 0xffffff80004d8c94
         sp = 0xffffff850dcd48c0  fp = 0xffffff850dcd48d0

gic_v3_dispatch() at arm_cpu_intr+0x5c
         pc = 0xffffff80004d8c94  lr = 0xffffff80004dcb70
         sp = 0xffffff850dcd48e0  fp = 0xffffff850dcd48f0

arm_cpu_intr() at handle_el1h_irq+0x5c
         pc = 0xffffff80004dcb70  lr = 0xffffff80004d7118
         sp = 0xffffff850dcd4900  fp = 0xffffff850dcd4aa0

handle_el1h_irq() at sched_idletd+0x360
         pc = 0xffffff80004d7118  lr = 0xffffff800028251c
         sp = 0xffffff850dcd4ab0  fp = 0xffffff850dcd4b70

sched_idletd() at fork_exit+0x7c
         pc = 0xffffff800028251c  lr = 0xffffff8000223f5c
         sp = 0xffffff850dcd4b80  fp = 0xffffff850dcd4bb0

fork_exit() at fork_trampoline+0x10
         pc = 0xffffff8000223f5c  lr = 0xffffff80004e6c8c
         sp = 0xffffff850dcd4bc0  fp = 0x0000000000000000

KDB: enter: panic

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