Roman Pisl wrote: > On 6.10.2009 15:56, Jan Kiszka wrote: >> Roman Pisl wrote: >>> ... >>>> Is there a chance to grab the panic log via serial line? The first of >>>> your two screenshots indicate that there might have happened something >>>> interesting before the NMI triggered, but it's scrolled out of sight. >>>> >>>> Jan >>>> >>> Hello, >>> here I send kernel panic (triggered by rt_task_sleep and latency test) >>> grabbed via serial line. >> Hmm, still only NMI alarms... >> >>> I'm ready to help with resolving this issue. >> Could you try enabling the I-pipe tracer with function tracing? It >> should dump a trace of the functions that were executed before the >> watchdog triggered. You may need to extend the number of tracepoints a >> bit, try "echo 1000> /proc/ipipe/trace/back_trace_points". >> >> Jan >> > > Then I had I/O activity on the background and got this. >
Try without CONFIG_IPIPE_DEBUG_INTERNAL (it triggers when we printk from NMI context). Please also raise the NMI threshold (CONFIG_XENO_HW_NMI_DEBUG_LATENCY_MAX) to 1 ms or so. It may otherwise trigger too early if there are hardware related delays + the tracing overhead. Jan -- Siemens AG, Corporate Technology, CT SE 2 Corporate Competence Center Embedded Linux _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
