Re: [Xen-devel] [PATCH] x86-64: don't use xmalloc_array() for allocation of the (per-CPU) IDTs

[Keir Fraser <keir@xxxxxxx>]

On 13/10/2011 16:16, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

>>> Looks good to me - I was actually considering to convert the x86-64
>>> code back to alloc_xenheap_pages() too (for we'll need to do that
>>> eventually anyway when we want to support more than 5Tb of memory)
>>> when I put together that earlier patch, but then refrained from doing so
>>> to keep the patch size down.
>> 
>> You mean there's a 5TB limit for alloc_domheap_pages() allocations??
> 
> No, I mean that currently we can't use more than 5Tb on any system.
> Due to address space limitations, going beyond that will require to
> introduce split domain and Xen heaps (including map_domain_page() etc)
> and hence the consistent use of alloc_xenheap_pages() vs.
> alloc_domheap_pages() (which currently isn't the case - you fixed just
> one group of them). Remember talking about that on the summit?

Ah yes, I do remember now!

 K.



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