Re: Non-GPL export of invalidate_mmap_range

Paul E. McKenney
2004-02-19T13:04:43Z

On Thu, Feb 19, 2004 at 07:01:41PM +0000, Christoph Hellwig wrote:
> On Thu, Feb 19, 2004 at 10:56:08AM -0800, Andrew Morton wrote:
> > inter-node cache consistency. Other distributed filesystems will need this
> > and probably AIX already provides it.
>
> You've probably not seen the AIX VM architecture. Good for you as it's
> not good for your stomache. I did when I still was SCAldera and although
> my NDAs don't allow me to go into details I can tell you that the AIX
> VM architecture is deeply tied into the segment architecture of the Power
> CPU and signicicantly different from any other UNIX variant.
>
> So porting code from AIX that touches anything VM related is a complete
> rewrite.

Or, alternatively, requires a surprisingly large glue-code layer.

Thanx, Paul