mmap() and SysV shared memory on DecStation 3100...

[Tim Endres]

Thank you to several who replied to my mmap() question.

It appears that mmap() is not supported by Dec for the
DecStation 3100 ultrix. The call is there. You can link
it in, but it *always* returns 0, and it *never* seems
to function. Too bad. mmap() is a very important function
to not implement.

The question now: How can we get a 4Meg System V shared memory segment?

Our shared memory needs are 4 Megabytes. We could break the segment up
but the re-write is too costly right now. Someone at Dec indicated that
the limit on the size of SysV shared memory segments is configurable.

Does anyone have experience increasing the SystemV shared memory segment
size limit?
Does anyone know if there is a *hard* maximum size?

Tim.