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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