Re: /proc/xen/balloon?

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

On Wed, Jun 24, 2009 at 01:23:08PM -0400, Steven M. Bellovin wrote:
> I'm trying to start a domU.  I'm getting the message
> 
>       No such file or directory: '/proc/xen/balloon'
> 
> As best I can tell, this involves a memory issue on the dom0.

No, it's in Xen itself.

> All
> machines involved are running 4.0. The dom0 has 128M; there are running
> domUs with 1024M, 512M, 128M, and 128M, and the machine has 2GB of
> physical RAM.  The domU I can't start should also get 128M.  (I recently
> changed one of the domUs to give it 1024M.)
> 
> What do I need to change to fix this?

128 + 1024 + 512 + 128 + 128 + 128  = 2048
You can't allocate all ram to domains, Xen itslef also needs some. It
reseves 32M, but may actually need more. Try reducing the ram of your
last domU to 96M, and if it doens't work, 64M
(xm info prints the free ram)

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