Re: Dropping mb_map

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

On Fri, Feb 05, 2010 at 07:16:51AM +0000, Michael van Elst wrote:
> >If NMBCLUSTERS is set, it is placing another limit. i386 and ARM get an
> >additional limit of 64MB in clusters, due to the small KVA size.
> 
> 64MB is still larger than before, isn't it?

Yes, it is. For i386 it amounts to 1/8 of the KVA, which is IMO
acceptable.

> >Third, it uses 1/16 of the physical memory in clusters or 1024 as
> >default value. If NMBCLUSTERS is set, it is used directly. The default
> >value should be as large as the old default for most sane systems.
> 
> What are the insane systems?

With the default cluster size of 2KB and GATEWAY: systems with less than
64MB RAM for the more modernish architectures (1024/2048 as default
value). Insane also for systems that raised the value above 1/4 of the
physical memory.

Joerg