Re: [Xen-devel] questions about ballooning

[Daniel Stodden <stodden@xxxxxxxxxx>]

On Sun, 2007-11-04 at 17:17 +0000, Keir Fraser wrote:
> 
> 
> On 4/11/07 17:04, "Daniel Stodden" <stodden@xxxxxxxxxx> wrote:
> 
> > not sure about how this bootstraps in the balloon. e.g. i'm not sure
> > whether the whole initial memory is allocated and then returned again
> > only upon demand. or if the initial reservation is full memory and then
> > only grown by the balloon. i believe the former is the case. maybe
> > someone else can comment (please).
> 
> The arch-specific code (setup-xen.c) sets up a mem_map big enough for
> maximum memory ever allocatable to this domain. 'Empty pages', which are not
> populated with RAM by the initial reservation, are detected by the balloon
> driver when it initialises. These empty pages are filled with RAM by the
> balloon driver on demand, if it detects that the memory target is raised.

thanks.

that helped, even despite me screwing 'full' and 'initial' while asking.

greetings,
daniel

-- 
Daniel Stodden
LRR     -      Lehrstuhl fÃr Rechnertechnik und Rechnerorganisation
Institut fÃr Informatik der TU MÃnchen             D-85748 Garching
http://www.lrr.in.tum.de/~stodden         mailto:stodden@xxxxxxxxxx
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