Philippe Gerum wrote: > On Sun, 2007-09-30 at 13:42 +0200, Jan Kiszka wrote: >> Jan Kiszka wrote: >>> Philippe Gerum wrote: >>>> On Sun, 2007-09-30 at 12:22 +0200, Jan Kiszka wrote: >> ... >>>>> And a third >>>>> one only gives me "Detected illicit call from domain Xenomai" before the >>>>> box reboots. :( >>>> Grmff... Do you run with your smp_processor_id() instrumentation in? >>> Yes, but I suspect this is just a symptom of some severe memory >>> corruption that (also?) hits I-pipe data structures. I just put in some >>> different instrumentation, and that warning is gone, the box just hangs >>> hard at a different point. Very unfriendly. >> Hah! Got some crash log by hacking a raw printk-to-uart: >> >> [...] >> <6>Xenomai: starting RTDM services. >> <6>NET: Registered protocol family 10 >> <6>lo: Disabled Privacy Extensions >> <6>ADDRCONF(NETDEV_UP): eth0: link is not ready >> <3>I-pipe: Detected illicit call from domain 'Xenomai' >> <3> into a service reserved for domain 'Linux' and below. >> f3a6bc18 00000000 00000000 c05dad6c f3a6bc3c c0105fc3 c03513c7 >> c05dc100 >> 00000009 f3a6bc54 c01479cb c03592f8 c0357ae2 c035e069 f3a6bc88 >> f3a6bc70 >> c0127224 c0111df8 00000000 f3a6bd74 00000000 f3a6bd74 f3a6bc80 >> c012727f >> Call Trace: >> [<c010520f>] show_trace_log_lvl+0x1f/0x40 >> [<c01052e1>] show_stack_log_lvl+0xb1/0xe0 >> [<c0105fc3>] show_stack+0x33/0x40 >> [<c01479cb>] ipipe_check_context+0x7b/0x90 >> [<c0127224>] __atomic_notifier_call_chain+0x24/0x60 >> [<c012727f>] atomic_notifier_call_chain+0x1f/0x30 >> [<c0131e02>] notify_die+0x32/0x40 >> [<c0105d29>] do_invalid_op+0x59/0xa0 >> [<c0111d0b>] __ipipe_handle_exception+0x7b/0x144 >> [<c02dfaeb>] error_code+0x6f/0x7c > > Wow. Why that? > >> [<c0111d13>] __ipipe_handle_exception+0x83/0x144 >> [<c02dfaeb>] error_code+0x6f/0x7c > > And this? We should not get any exception over an IPI3 handler. I guess > the double fault may be explained by this root cause. > >> [<c01117df>] __ipipe_handle_irq+0x4f/0x140 >> [<c0104c5e>] ipipe_ipi3+0x26/0x40 > > Our LAPIC timer vector. Are you running full modular or statically btw?
Fully modular. Compiling the nucleus in makes the lock-up move to another, once again invisible spot. I nailed down the fault address in the scenario above. It's in the nucleus module, at the first byte of xntimer_tick_aperiodic. Are we loosing module text pages over the time? This functions must have been executed before as the timer was armed while I collected the /proc/modules and then triggered the crash. Jan
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