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xen-devel
Re: [Xen-devel] How to determine memory size in HVM
Hypercall XENMEM_current_reservation.
*But* be aware I'm not sure how that interacts with e.g., virtual
framebuffer memory. Well, actually I know it will include the virtual
framebuffer memory which is not actually really part of normal guest RAM.
The question will be: does the xenstore 'target' value also include it? I
guess you'll have to compare to create a HVM guest and compare the two to
decide.
-- Keir
On 08/06/2009 15:12, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:
> How can I tell how much memory my VM has under HVM? I want to have
> something concrete to compare the 'target' value in xenstore to for
> ballooning so I am reluctant to ask Windows the question. There seems to
> be a nr_pages in start_info, but HVM doesn't have that...
>
> My reason for not wanting to ask Windows how much memory is that if it
> says we have 3.5G (reasonable without PAE) and xenstore says we have 4G
> then I'm going to have to fudge things a bit to know whether we are
> ballooning up or down etc.
>
> I could just read the initial target value from xenstore on boot, but
> even that could be changed before my drivers get to it.
>
> Thanks
>
> James
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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