Quoting Scott L. Burson,

>    Heh.  No worse than the vendor binary-only OS on my home machine, which
>    is a Mach derivative and - AFAICT - suffers from the same bug.  It's
>    just less obvious because it's harder to definitely identify without
>    kernel source :-)

> SunOS 4 may well have the same bug.  I just added up the process sizes from
> `ps' on my machine and got 97224k, but `pstat -s' reports 137612k used.  I've
> seen such discrepancies many times before, and have long wondered what caused
> them.

It seems unlikely that SunOS 4 has the same bug, since the VM system in
SunOS 4 is quite different from the Mach-derived VM system in 4.3+ BSD
systems.

- Frank