Having done a lot with mmap on 32bit systems I can't remember such a technical limitation either.. ..although in practive it might be hard to find 256MB of con

Having done a lot with mmap on 32bit systems I can't remember such a technical limitation either.. ..although in practive it might be hard to find 256MB of contiguous memory in a 4GB virtual memory space due to fragmentation of other allocations and shared libraries, especially with ASLR.