Re: [Xen-devel] A tale of three memory allocators

[Hollis Blanchard <hollisb@xxxxxxxxxx>]

On Friday 18 March 2005 14:11, Magenheimer, Dan (HP Labs Fort Collins) wrote:
> I'm less concerned about NUMA configurations... I agree that
> NUMA support could be added later.  My first concern would
> be discontiguous memory as, on ia64, it is not uncommon
> for a machine to have a physical memory map of something like:
>
> 0GB-1GB
> 2GB-4GB
> 64GB-69GB
> Total  8GB
>
> How does the Rusty Russell allocator handle a map like this?

xmalloc.c calls alloc_xenheap_pages() as needed.

So call page_alloc.c's init_boot_pages() repeatedly (as is done already for 
x86), passing it the memory ranges you do have, and xmalloc will use only 
that memory.

-- 
Hollis Blanchard
IBM Linux Technology Center


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