Re: [PATCH 1/2] x86: Make E820_X_MAX unconditionally larger than E820MAX

From: Juergen Gross
Date: Fri Dec 09 2016 - 05:12:45 EST

On 05/12/16 18:49, Alex Thorlton wrote:
> It's really not necessary to limit E820_X_MAX to 128 in the non-EFI
> case. This commit drops E820_X_MAX's dependency on CONFIG_EFI, so that
> E820_X_MAX is always at least slightly larger than E820MAX.
> The real motivation behind this is actually to prevent some issues in
> the Xen kernel, where the XENMEM_machine_memory_map hypercall can
> produce an e820 map larger than 128 entries, even on systems where the
> original e820 table was quite a bit smaller than that, depending on how
> many IOAPICs are installed on the system.
> Signed-off-by: Alex Thorlton <athorlton@xxxxxxx>
> Suggested-by: Ingo Molnar <mingo@xxxxxxxxxx>

Commited to xen/tip.git for-linus-4.10