Re: [PATCH v3 06/24] KVM: x86/mmu: Disallow page merging (huge page adjustment) for mirror root

From: Sean Christopherson

Date: Thu Jan 15 2026 - 17:50:01 EST


On Tue, Jan 06, 2026, Yan Zhao wrote:
> From: Rick P Edgecombe <rick.p.edgecombe@xxxxxxxxx>
>
> Disallow page merging (huge page adjustment) for the mirror root by
> utilizing disallowed_hugepage_adjust().

Why? What is this actually doing? The below explains "how" but I'm baffled as
to the purpose. I'm guessing there are hints in the surrounding patches, but I
haven't read them in depth, and shouldn't need to in order to understand the
primary reason behind a change.