> It would be really, really, cool if someone could try to implement BSD's
> unionfs for Linux. It's a really nice feature that we're missing in
> Linux today.
>
> About the only ugly part of BSD's unionfs is that it requires libc
> support to avoid duplicate names from readdir(). The problem with doing
> this in the kernel is that it's really hard to have the kernel throw out
> duplicate names. (You can do it, but it would require lots of memory
> allocations, which you'd really rather not do in the kernel.)
>
> - Ted
Wouldn't Linux's wonderful dcache make this easier?