What is maximum process size in linux?

What is the maximize process size allowable in linux? I would like to run a process with as large a size as possible.

I would guess there is a limit, because they need space for op system, maybe page size might require limits, ect. But I think I want to max out use of memory for a single program/process.

Thanks

It is totally memory dependent. If you load lots of drivers, you get very little user space (if you have low memory). If you have lots of memory, you get lots of memory.

So if you have 64bit linux, can you set process size to unlimited>