SMP crashes after setserial /dev/ttyS1

From: Olaf Dietrich (olaf.dietrich@urz.uni-heidelberg.de)
Date: Fri Jan 28 2000 - 18:28:51 EST

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    A small SMP kernel 2.2.14 (but I've seen similar effects
    since at least 2.0.x) crashes reproducible; hardware is
    an old Gigabyte board 586DX with two Pentium 200 MMX.

    Crashes are triggered e. g. under X by quick mouse (PS/2)
    motion while running gv (PostScript viewer) or after some
    time compiling (e. g. make -j 6 zImage). The only thing
    I've found in the log-files is typically

       kernel: unexpected IRQ vector 77 on CPU#1!
       last message repeated 26 times

    and sometimes (I'm not sure if this is "typically",
    I've seen it only recently (2.2.14?))

       kernel: unexpected IRQ vector 70 on CPU#0!

    and

       kernel: Uhhuh. NMI received for unknown reason 2d.
       kernel: Dazed and confused, but trying to continue
       kernel: Do you have a strange power saving mode enabled?

    Magic SysRq works sometimes after the crash - sometimes not ...
    (i. e. hardware reset necessary).

    However, to trigger the crash easily, I must have run

      /bin/setserial /dev/ttyS1

    Without that, the system is stable or at least much more
    stable. setserial /dev/ttyS0 is no problem (and actually,
    there is a modem connected to /dev/ttyS0, /dev/ttyS1 is not
    used).

    Any ideas or suggestions? Any more information I can
    provide?

    Thanks,
    Olaf

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    This archive was generated by hypermail 2b29 : Sat Jan 29 2000 - 03:42:32 EST