[rescue] What to do with the SS20

Steven M Jones smj+rescue at crash.com
Sun Jun 22 18:56:26 CDT 2014

On 06/22/2014 06:21 AM, Sandwich Maker wrote:
> from memory, the reason for 4.1.4 was
> integrating the ross kernel fixes as sun started selling ross-equipped
> ss20s, and i believe it supports smp on rosses.
> it also supports smp on ti cpus, afaik something sun never advertised.
> i personally tested and verified this.

Sun introduced multiprocessor support in SunOS 4.1.2, IIRC, partly in
response to Solbourne (IMHO). The SPARCserver 600MP models were out and
4.1.2 supported them well before the first harrowingly unstable Solaris
2 release, so I don't think the MP support was a secret.

Also, I believe all SunOS 4 releases can only have one CPU executing
kernel code at a time. I'm not sure if technically you have to call that
asymmetric multiprocessing, rather than SMP.

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