/dev/zero and MAP_ANON (was: Re: GC triggering ...)

[Guy Harris]

>Here is a question for you about mmap of /dev/zero.  Is this a useful feature
>for unrelated processes to share memory?

Not as far as I know.  There's nothing on which they can rendezvous....

>Are there any other ways to share zero-filled memory without consuming
>disk space (as with regular mapped files) for unrelated processes in
>these operating systems?

Yes, you can use the shared memory mechanism provided by the S5 IPC
mechanisms ("shmat()" and all that).