linux-kernel - Re: [PATCH v8 06/11] KVM: x86/mmu: Only check gfn age in shadow MMU if indirect_shadow

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Message-ID: <CAOUHufYA9wSQqOtoEx4yp1t60s+iOoM7Bq9yT+pfY82y0dQWvA@mail.gmail.com>
Date: Tue, 5 Nov 2024 11:49:32 -0700
From: Yu Zhao <yuzhao@...gle.com>
To: James Houghton <jthoughton@...gle.com>
Cc: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>, 
	David Matlack <dmatlack@...gle.com>, David Rientjes <rientjes@...gle.com>, Marc Zyngier <maz@...nel.org>, 
	Oliver Upton <oliver.upton@...ux.dev>, Wei Xu <weixugc@...gle.com>, 
	Axel Rasmussen <axelrasmussen@...gle.com>, kvm@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 06/11] KVM: x86/mmu: Only check gfn age in shadow MMU
 if indirect_shadow_pages > 0

On Tue, Nov 5, 2024 at 11:43 AM James Houghton <jthoughton@...gle.com> wrote:
>
> Optimize both kvm_age_gfn and kvm_test_age_gfn's interaction with the
> shadow MMU by, rather than checking if our memslot has rmaps, check if
> there are any indirect_shadow_pages at all.
>
> Signed-off-by: James Houghton <jthoughton@...gle.com>

Acked-by: Yu Zhao <yuzhao@...gle.com>