Re: [PATCH v2 15/26] KVM: x86/mmu: Update page stats in __rmap_add()

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Subject: Re: [PATCH v2 15/26] KVM: x86/mmu: Update page stats in __rmap_add()
From: Peter Xu <peterx@xxxxxxxxxx>
Date: Tue, 15 Mar 2022 18:39:11 +0800
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>, Marc Zyngier <maz@xxxxxxxxxx>, Huacai Chen <chenhuacai@xxxxxxxxxx>, Aleksandar Markovic <aleksandar.qemu.devel@xxxxxxxxx>, Anup Patel <anup@xxxxxxxxxxxxxx>, Paul Walmsley <paul.walmsley@xxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Albert Ou <aou@xxxxxxxxxxxxxxxxx>, Sean Christopherson <seanjc@xxxxxxxxxx>, Andrew Jones <drjones@xxxxxxxxxx>, Ben Gardon <bgardon@xxxxxxxxxx>, maciej.szmigiero@xxxxxxxxxx, "moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)" <kvmarm@xxxxxxxxxxxxxxxxxxxxx>, "open list:KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)" <linux-mips@xxxxxxxxxxxxxxx>, "open list:KERNEL VIRTUAL MACHINE FOR MIPS (KVM/mips)" <kvm@xxxxxxxxxxxxxxx>, "open list:KERNEL VIRTUAL MACHINE FOR RISC-V (KVM/riscv)" <kvm-riscv@xxxxxxxxxxxxxxxxxxx>, Peter Feiner <pfeiner@xxxxxxxxxx>
In-reply-to: <20220311002528.2230172-16-dmatlack@google.com>
References: <20220311002528.2230172-1-dmatlack@google.com> <20220311002528.2230172-16-dmatlack@google.com>

On Fri, Mar 11, 2022 at 12:25:17AM +0000, David Matlack wrote:
> Update the page stats in __rmap_add() rather than at the call site. This
> will avoid having to manually update page stats when splitting huge
> pages in a subsequent commit.
> 
> No functional change intended.
> 
> Reviewed-by: Ben Gardon <bgardon@xxxxxxxxxx>
> Signed-off-by: David Matlack <dmatlack@xxxxxxxxxx>

Reviewed-by: Peter Xu <peterx@xxxxxxxxxx>

-- 
Peter Xu

References:
- [PATCH v2 00/26] Extend Eager Page Splitting to the shadow MMU
  - From: David Matlack
- [PATCH v2 15/26] KVM: x86/mmu: Update page stats in __rmap_add()
  - From: David Matlack

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