Re: 64GB NUMA-Q after pgcl

Andrea Arcangeli
2003-04-01T00:33:33Z

On Mon, Mar 31, 2003 at 07:41:17PM +0100, Christoph Hellwig wrote:
> On Mon, Mar 31, 2003 at 08:35:06PM +0200, Andrea Arcangeli wrote:
> > About you not caring anymore about the mem_map array size, that still
> > matters on the embedded usage, infact rmap on the embedded usage is the
> > biggest waste there, normally they don't even have swap so if something
> > you should use the rmap provided for truncate, rather than wasting
> > memory in the mem_map array.
>
> We have CONFIG_SWAP for that in 2.5..

that's useless for the case I mentioned, you definitely still need to
unpage all private and shared mappings, and you can use the rmap
provided by truncate for that. Infact I don't think CONFIG_SWAP is
useful at all.

Andrea