Re: [Xen-devel] [PATCH for-4.12 v2 2/2] xen/arm: Stop relocating Xen

[Andrii Anisov <andrii.anisov@xxxxxxxxx>]

On 14.12.18 18:26, Julien Grall wrote:
> I don't understand how you came up with the conclusion that 128MB will be
> removed from Dom0. We only have the requirement that the first bank is at least
> 128MB. So can you expand it?
IIRC Linux kernel requires that the machine RAM start must be 128MB aligned.
Look at `allocate_memory_11()`, `min_low_order` variable usage. It affects all 
low memory 1:1 allocation and makes all low memory banks 128MB aligned both 
start and end.
So that having a module in a low memory poisons the whole 128MB region.

--
Sincerely,
Andrii Anisov.

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