another argument against shared libraries

[gwyn at brl-vld]

From:      Doug Gwyn (VLD/VMB) <gwyn at brl-vld>

UNIX System V shared memory sets up page table entries for the processes
involved; what else did you expect?  I wouldn't say they completely
redesigned major chunks of the kernel, but exec, exit, etc. do have hooks
into the shared-memory module.

This shared memory is really shared memory.  I believe it was added to
UNIX by the Real-Time folks, who need this kind of thing.  Sockets are
not the universal answer to everybody's IPC needs.