RE: [Xen-devel] Re: GSoC 2010 - Migration from memory ballooning tomemory hotplug in Xen

[James Harper]

> 
> Daniel Kiper <dkiper@xxxxxxxxxxxx> writes:
> >
> > OK, let's go to details. When I was playing with Xen I saw that
> > ballooning does not give possibility to extend memory over boundary
> > declared at the start of system. Yes, I know that is by desing
however
> > I thought that it is a limitation which could by very annoing in
some
> > enviroments (I think especially about servers). That is why I
decided to
> > develop some code which remove that one. At the beggining I thought
> > that it should be replaced by memory hotplyg however after some test
> > and discussion with Jeremy we decided to link balooning (for memory
> > removal) with memory hotplug (for extending memory above boundary
> > declared at the startup of system). Additionaly, we decided to
implement
> > this solution for Linux Xen gustes in all forms (PV/i386,x86_64 and
> > HVM/i386,x86_64).
> 
> While you can do that the value is not very large because you
> could just start the guests with more memory, but ballooned in
> the first place (so that they don't actually use it)
> 

I think hotplug is a better method for adding memory for Windows.

James
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