Re: [Xen-users] dom0's layout on physical memory?

[Min Lee <min.lee@xxxxxxxxxx>]

Thank you for your reply, Ian. I'll take a look at them..
thanks!
Min

On 2/4/2013 4:38 AM, Ian Campbell wrote:
> On Fri, 2013-02-01 at 00:31 +0000, Min Lee wrote:
> > Hello, all
> > I thought dom0 is layed out on physical memory starting 0, linearly, but
> > this message,
> >
> > (XEN) *** LOADING DOMAIN 0 ***
> > (XEN)  Xen  kernel: 64-bit, lsb, compat32
> > (XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x1d87000
> > (XEN) PHYSICAL MEMORY ARRANGEMENT:
> > (XEN)  Dom0 alloc.:   0000000c14000000->0000000c18000000 (498514 pages to
> > be allocated)
> >
> > shows the address range 0000000c14000000->0000000c18000000  ,
> > what is this?
> That is the virtual address range.
>
> The start of day memory layout is described in
> http://xenbits.xen.org/docs/unstable/hypercall/include,public,xen.h.html#incontents_startofday
>
> >   it's 64MB range and why 64MB from Dom0 is located here?
> This is the size of the initial mapping given your kenrel and initrd
> size etc.
>
> > I think 498514 pages will be allocated later, but where, exactly??
> IIRC the kernel will map it as part of its initialisation,
> init_memory_mapping() in Linux perhaps?
>
> > if dom0's memory is partitioned into several places,
> > then, what happens to their GPFN??
> I'm not sure I understand this question.
>
> Ian.
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