[Xen-devel] Re: [PATCH 2/6] Change the boot allocator function to support memory add

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 29/06/2009 03:04, "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> wrote:

>> Actually it'd be nice to get rid of the allocator bitmap
>> altogether, since
> 
> I checked the code and seems the main caller is map_pages_to_xen(). So do you
> mean you will setup the frametable earlier, so that all page allocator will
> use the main allocator, even in map_pages_to_xen()?

I would have it go steal pages from boot_e820 directly I think.

> For memory add, it may be a bit different. The new pages should not be in main
> allocator before the m2p table is setup (in boot stage, the m2p will not be
> used till construct dom0, so it is ok) , also we may want to use the new
> memory as the page table when setup the m2p table.

Well, I assume you will code up something special for that. That seems to
have nothing to do with whether we keep the boot-time allocator, and
allocation bitmap, or not.

 -- Keir



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