Re: memory dispatch

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Jan 05, 2006 at 06:32:30PM +0100, Joel CARNAT wrote:
> Hi,
> 
> I remember a discussion about how to give bits of physical RAM with Xen
> 1.2 but just can't find the thread archive... Now I have Xen2 and can't
> find the answer to :
> 
> What is the best way when dealing with RAM (NetBSD 3.0 / Xen 2.0.7) ?
> 1. Give all the RAM to dom0 (via grub's dom0_mem) ? And then domU will
> herirate from it (from "memory" option).

Hum, this may require a working 'baloon' driver, which is not there in
NetBSD yet.

> 
> 2. Give the minimum to dom0 (let say 64Mo) ? And then use domU's memory
> option.
> 
> I'm wondering this because compiling net/wget in NetBSD/dom1 seems slow
> (NetBSD/dom0 has 64M and NetBSD/dom1 has 128 ; /usr/pkgsrc being NFS
> exported from dom0 to dom1). So maybe 64M for dom0 is a bit little and
> it would be nice if dom0 could handle all the RAM and dispatch it to the
> domUs.

Run systat vm on both domains, and see if one of them has pagein/pageout
activity.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--