[johnnym]

In the meantime I checked the memory modules from the IDE. They all come back ok after running memtest. But It looks like one of the three quads used EDO DRAMs.  I removed that quad now to be sure, but it didn't make a difference.

MIPSIV (the R10000) and MIPS64 (Octeon) are not completely compatible. Cache control is incompatible, IIRC. So what may be happening is that the cache is in an inconsistent state, explaining your bus errors (bus errors are detected external to the CPU and sometimes reflect bogus addresses). The segmentation violations are detected by the CPU when it accesses a process's page tables in response to a TLB miss. Stale cache data could also cause those.

But how could this explain, that these differences don't come to play in single user mode on the very same machine? And the other machines (R4K Indy, R5K O2 and R12K Octane) are not affected. Hm, I could try to check how a R10K Octane behaves but need to get another system board first.

And still, both sgi and octeon use the same package source (e.g. https://ftp.eu.openbsd.org/pub/OpenBSD/6...es/mips64/) and their userland tools are:

PHP Code:

root@nfs:/srv/nfs/indigo2/root/bin# file cat
cat: ELF 64-bit MSB shared object, MIPS, MIPS-III version 1 (SYSV), dynamically linked, for OpenBSD, stripped 


Take a look at the 2nd edition of "See MIPS Run" and what it says about the differences.

Will do if I find a copy online.

The output is hard to understand because there is no indication of which processes are being killed but we know they are being run from rc files.

The second log has a listing of / showing the core files of the killed processes:

PHP Code:

indigo2# ls
.cshrc          dev_mkdb.core   id.core         quotaon.core    swap
.profile        etc             kvm_mkdb.core   root            sys
altroot         getcap.core     mktemp.core     sbin            tmp
bin             getty.core      mnt             sed.core        usr
bsd             grep.core       perl.core       slaacd.core     var
bsd.booted      head.core       pgrep.core      sort.core
dev             home            pkill.core      ssh-keygen.core 


Some other output stands out, in particular the usage notes indicate that something is wrong with the parameters being supplied to those utilities in the rc files. Also "unexpected !=" means there is a syntax error, possibly caused by an unset variable.
You can copy and paste one line at a time from the rc file to see where the problem first occurs.

I'll have a look into that, thanks for the pointers.