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

[Juergen Gross <jgross@xxxxxxxx>]

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


Juergen

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