Re: tmpfs replacement

[Roland McGrath]

There is no reason to replace tmpfs per se, just hack it.
There is no problem with its directory management code, right?

A tmpfs that uses vm_allocate for file pages is perfectly doable, it just
has a limit on total file space imposed by the address space of the tmpfs
server process (so presumably about the same as the ext2fs disk mapping
size limit, which is probably big enough for tmpfs uses), and it doesn't
make it easy to support io_map.  If you wanted to support io_map by also
using libpager, that might be a little more weird and suboptimal.