Re: [9fans] mmap

[Paul Lalonde <plalonde@telus.net>]

Roman V. Shaposhnik wrote:
> Personally, my
> experience of trying to use mmap() as a useful abstraction for the
> CPU's MMU was the last straw. It can't do even that reliably
> and in a portable fashion. Not to digress, but I was even more surprised
> to learn that there's not a single API on UNIX that can:
>     http://thread.gmane.org/gmane.os.netbsd.devel.kernel/6392/focus=6457
>

Amen.  I've had to get our OS team to shoehorn in some remap() calls
that let me point two(many) virtual addresses to a common physical
address.  It's disgusting that the process for doing this with mmap
requires /proc/#/mem and other scary things.

Does anyone have pointers to *nice* interfaces for doing this?  I don't
care which OS, but I'd like to not have the implementation I'm
requesting suck because I missed some gotchas that someone else already hit.

Thanks,
    Paul