Pushing image transport logic down the stack

[Peter "Firefly" Lund]

On Tue, 5 Sep 2006, Owen Taylor wrote:

> process 1: ftrunctate(fd, new_size)/mmap()/write-to-it/munmap()
> process 2: mmap()/read-from-it/munmap()/ftruncate(fd, 0);

Is it really necessary to mmap/munmap/ftruncate all the time?

-Peter