Kernel panics and double panics

[Karl Denninger]

In article <2599259F.31C0 at marob.masa.com> daveh at marob.masa.com (Dave Hammond) writes:
>OS: Xenix 386, release 2.3.2, update R ("GT" upgrade kit)
>Hardware: Everex 25mhz 386, 6 MB 32 bit RAM
>Peripherals: 80387, ESDI drive, 60MB QIC tape, Arnet Smart-8 serial expander.
>
>The system boots and operates normally for a period of time, but will
>eventually panic with an error:
>
>	Kernel Panic - Non-recoverable Kernel Page Fault.
>
>The most recent panic (this morning) was followed by:
>
>	Kernel Double Panic - Stack Fault.
>
>The panics can occur hours or days apart, and (as yet) can not be
>attributed to any specific condition.  

Try running 80286 things, such as the 286 compiler.  That seems to provoke
it in some cases.

>The most obvious hint that the
>problem is surfacing is when an exec?() call causes a segmentation
>violation, without ever loading the program.  If the shell is attempting
>the exec?(), this results in a "Memory fault, core dumped" message and a
>return to the shell prompt.
>
>Advice as to remedial action, debugging procedures, etc is desparately
>sought!  E-mail is preferred, however, I read this newsgroup daily.

Try removing the Arnet support.  We had just such a problem and it
disappeared when we got rid of the Anvil board in our system!

--
Karl Denninger (karl at ddsw1.MCS.COM, <well-connected>!ddsw1!karl)
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