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Re: [Xen-devel] Dynamic Memory Management and Migration (3.0.4-0)

On Wed, Jan 31, 2007 at 04:29:25PM +0100, Timo Benk wrote:
> Hello,
> i noticed the following Problem:
> if i want to allow dynamic memory management of Linux-domains, i need to
> set the following kernel parameter. Otherwise it is not possible, to
> increase the memory of the domain above the initial assigned value:
> extra = "mem=10240M"

That should not be neccessary. We fixed the Hypervisor to implement the
neccessary magic so that XenD can utilize the 'maxmem' parameter in
guest config files correctly So for example


Will make the guest VM boot up with 500 MB of initial RAM. It will also
tell it to allocate page tables entries big enough to address 800 MB of
RAM. So after boot up, you will be able to balloon the guest upto this
maxmimum of 800 MB simply using 'xm mem-set 800'.

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