[SeaBIOS] [RFC PATCH 0/9] ACPI memory hotplug

[Avi Kivity]

On 04/22/2012 05:09 PM, Gleb Natapov wrote:
> On Sun, Apr 22, 2012 at 05:06:43PM +0300, Avi Kivity wrote:
> > On 04/22/2012 04:56 PM, Gleb Natapov wrote:
> > > start. We will need it for migration anyway.
> > >
> > > > hotplug-able memory slots i.e. initial system memory is not modeled with
> > > > memslots. The concept could be generalized to include all memory though, or it
> > > > could more closely follow kvm-memory slots.
> > > OK, I hope final version will allow for memory < 4G to be hot-pluggable.
> > 
> > Why is that important?
> > 
> Because my feeling is that people that want to use this kind of feature
> what to start using it with VMs smaller than 4G. Of course not all
> memory have to be hot unpluggable. Making first 1M or event first 128M not
> unpluggable make perfect sense.

Can't you achieve this with -m 1G, -device dimm,size=1G,populated=true
-device dimm,size=1G,populated=false?

(I don't think hotplugging below 512MB is needed, but I don't have any
real data on this).

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