On 10/12/07, Daniel Rossier <[EMAIL PROTECTED]> wrote: > Jan Kiszka wrote: > > ROSSIER Daniel wrote: > > > Hi everyone, > > > > > > I'm taking over the original thread from Patrick concerning the > > > port of Xenomai on Xscale with Linux 2.6.20. Briefly summarized, > > > the boot process actually freezes after a while right after the > > > nucleus has been started. > > > > > > I've investigated the issue over the last hours, and I came up with > > > the following conclusion: it seems that the problem is due to a > > > endless loop in do_gettimeofday in arch/arm/kernel/time.c. Here is > > > the code: > > > > > > "... do { seq = read_seqbegin_irqsave(&xtime_lock, flags); usec = > > > system_timer->offset(); sec = xtime.tv_sec; usec += xtime.tv_nsec / > > > 1000; } while (read_seqretry_irqrestore(&xtime_lock, seq, flags)); > > > ..." > > > > > > If I remove the do { } while loop with the call to > > > read_seqbegin_irqsave(), then the boot process is going ahead (I > > > got a suspicious error like "I-pipe: Detected illicit call from > > > domain 'Xenomai' " but it might well be normal with such a > > > modification. > > > > Please post the full oops about that "illicit call". It may point to > > an otherwise hidden invalid usage of Linux services over the Xenomai > > domain and explain the lock-up. > > Sure; here is the output message: > " > I-pipe: Detected illicit call from domain 'Xenomai' > into a service reserved for domain 'Linux' and below. > [<c0027328>] (show_stack+0x0/0x40) from [<c005d590>] > (ipipe_check_context+0x88/0xa4) > [<c005d508>] (ipipe_check_context+0x0/0xa4) from [<c002d9e4>] > (__ipipe_mach_set_dec+0x24/0x7c) > r5 = 54503BD0 r4 = 00003029 > [<c002d9c0>] (__ipipe_mach_set_dec+0x0/0x7c) from [<c00681e0>] > (xntimer_do_tick_aperiodic+0x2f4/0x33c) > r4 = 00003029
This does not make sense, __ipipe_mach_set_dec is a very simple function that should not trigger this illicit call. -- Gilles Chanteperdrix _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core