Re: Implementation of POSIX shared memory objects

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Wed, Feb 11, 2009 at 10:41:42AM +0000, Mindaugas Rasiukevicius wrote:
> ad%netbsd.org@localhost wrote:
> > On Wed, Feb 11, 2009 at 10:13:17AM +0000, Mindaugas Rasiukevicius wrote:
> > 
> > > Any reads/writes? Apart from greater file-system overhead (as opposed to
> > > aobj), I think it can involve disks. :)
> > 
> > tmpfs == swap backed uao
> 
> Right, but this is dependency on tmpfs, which one might not necessary want
> to have. I think it is not that friendly for embedded devices too.

You know that Linux is doing that for general SysV IPC? I don't think it
is a worse deal than another arbitrary memory sink in kernel space. It
is not even guarantied to be simpler in the kernel, if you also want to
allow swap backing.

Joerg