Re: [Xen-devel] [PATCH for 4.13] x86/shim: don't reserve 640k - 1M region in E820

[Jan Beulich <jbeulich@xxxxxxxx>]

On 28.10.2019 09:56, Sergey Dyasli wrote:
> Converting a guest from PV to PV-in-PVH makes the guest to have 384k
> less memory, which may confuse guest's balloon driver. This happens
> because Xen unconditionally reserves 640k - 1M region in E820 despite
> the fact that it's really a usable RAM in PVH boot mode.

This is a PVH property according to your description and according
to my understanding. Why would you then ...

> Fix this by skipping the region type change for pv-shim mode.

... alter behavior for shim mode only, rather than when booted in
PVH mode in general?

Jan

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