Xen devel - May 2005 - Initial memory allocation for adomain (clarification) - newbie

Hello,

I had read "Xen and the Art of Virtualization" doc  from SOSP 2003.
I am also learning the code.

Natuarally, there were changes from that doc.

However , I want to clarify one point:
In section 3.3.4 of this doc , "Physical memory", it says:

"The initial memory allocation, or reservation, for each domain is
specified at the time of its creation; memory is thus statically partitioned
between domains, providing strong isolation."

In domain.c , we have:
struct domain *do_createdomain(domid_t dom_id, unsigned int cpu);

Now I do not see here any specified paramter denoting  initial memory 
allocation for the domain.
And as I understand, creation of the domain is done by this method, 
do_createdomain().

Am I missing something ?

Regards,
Sting

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>
> Now I do not see here any specified paramter denoting  initial memory 
> allocation for the domain.
> And as I understand, creation of the domain is done by this method, 
> do_createdomain().
>
> Am I missing something ?
Domain creation is more involved than just calling creatdomain(). That 
allocates a domain structure within Xen, which the user-space tools 
then populate with RAM, load a kernel image, etc.

See xc_domain_create() in tools/libxc/xc_domain.c for some of the 
details (inclduing how RAM is added to a new domain).

  -- Keir


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