Re: zone ipc ports exhausted

[Roland McGrath]

It is overwhelmingly likely there is a port leak.

It's true that the limits are quite arbitrary (see kern/mach_param.h).
But the PORT_MAX value is large enough it's unlikely you actually hit it
without a leak.

These limits just contrain page consumption, they don't cause pre-allocation.
So it is not harmful to increase them aside from failing to detect real leaks.

In the ultimate long term, there should not be completely arbitrary limits
on these things.  But we probably won't really care to worry about that
before we get to replacing major pieces of the microkernel in the untold
future anyhow.