Re: Memory-mapped files

[Marcus Brinkmann]

On Tue, Nov 12, 2002 at 06:21:04PM +0100, Ludovic Courtès wrote:
> On Tue, Nov 12, 2002 at 01:41:47PM +0100, Marcus Brinkmann wrote:
> > They should fall back to normal read/write if mmap fails.
> 
> Gcc does not actually fall back to normal read/write.  Should we ask them to
> fix that?

I think that would be proper.

> > Why can't you use libpager?
> 
> This is a netfs-based filesystem (tarfs).  So far, I've never felt like
> needing libpager and that's why I'm not using it currently (however, you might
> be able to find good reasons/ways to use it for this particular filesystem?).

mmap works with memory objects, which are paged by the server.  libpager is
a library to manage such external pagers for memory objects.  If you want to
implement io_map in your server, you should feel the need to use libpager ;)

Thanks,
Marcus

-- 
`Rhubarb is no Egyptian god.' GNU      http://www.gnu.org    marcus@gnu.org
Marcus Brinkmann              The Hurd http://www.gnu.org/software/hurd/
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de/