Re: [PATCH 1/4] SGI Altix cross partition functionality

[Dean Nelson <dcn@sgi.com>]

On Wed, Jun 16, 2004 at 05:39:44PM +0100, Christoph Hellwig wrote:
> On Wed, Jun 16, 2004 at 11:33:39AM -0500, Dean Nelson wrote:
> > --- linux.orig/mm/page_alloc.c	Thu Jun 10 14:47:51 2004
> > +++ linux/mm/page_alloc.c	Thu Jun 10 16:31:55 2004
> > @@ -40,6 +40,7 @@ unsigned long totalram_pages;
> >  unsigned long totalhigh_pages;
> >  int nr_swap_pages;
> >  int numnodes = 1;
> > +EXPORT_SYMBOL(numnodes);
> 
> bad idea.  I have patches to completely kill numnodes, don't try to
> mess with it.  So far it's also completly an architecture-thing.

What are you planning to replace numnodes with?

XPC has two functions (xpc_allow_IPI_ops() and xpc_restrict_IPI_ops()) which
need to change the protections governing IPI operations and AMO (memory)
operations for each node in a partition. What mechanism are you proposing
to allow one to iterate through all of the nodes in a partition?

Thanks,
Dean