[Pkg-xen-devel] Bug#520641: Cannot create HVM domain

Richard Kettlewell rjk at greenend.org.uk
Fri Jul 10 09:39:42 UTC 2009

Romain Francoise wrote:
> This happens when there's not enough free memory to compensate the
> memory overhead of domain creation, xend balloons down dom0 by 2MB
> to work around this, but sometimes it's not enough.
> Freeing more memory manually, or disabling ballooning of dom0
> altogether (a good idea in any case) fixes it.

Sorry, freeing more memory where and how?  It's a 4GB machine with 960MB 
allocated to the current (PV) guests.

I have only the vaguest idea of what "ballooning" means (something to do with 
controlling the memory available to domains?), and no idea why it might be a bad 
idea or how to turn it off.

If any of this is documented anywhere then I must have missed some important 
piece of documentation!


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