On 01.11.2019 21:25, Andrew Cooper wrote:
> From: Sergey Dyasli <sergey.dya...@citrix.com>
> 
> 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.
> 
> Fix this by skipping region type change in virtualised environments,
> trusting whatever memory map our hypervisor has provided.
> 
> Signed-off-by: Sergey Dyasli <sergey.dya...@citrix.com>

Reviewed-by: Jan Beulich <jbeul...@suse.com>

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