Re: [PATCH v5 1/4] mm: add NR_SECONDARY_PAGETABLE to count secondary page table uses.

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To: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
Subject: Re: [PATCH v5 1/4] mm: add NR_SECONDARY_PAGETABLE to count secondary page table uses.
From: Shakeel Butt <shakeelb@xxxxxxxxxx>
Date: Fri, 10 Jun 2022 12:55:31 -0700
Cc: Tejun Heo <tj@xxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Zefan Li <lizefan.x@xxxxxxxxxxxxx>, Marc Zyngier <maz@xxxxxxxxxx>, James Morse <james.morse@xxxxxxx>, Alexandru Elisei <alexandru.elisei@xxxxxxx>, Suzuki K Poulose <suzuki.poulose@xxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Sean Christopherson <seanjc@xxxxxxxxxx>, Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>, Wanpeng Li <wanpengli@xxxxxxxxxxx>, Jim Mattson <jmattson@xxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Roman Gushchin <roman.gushchin@xxxxxxxxx>, Oliver Upton <oupton@xxxxxxxxxx>, Cgroups <cgroups@xxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Linux ARM <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, kvmarm@xxxxxxxxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, Linux MM <linux-mm@xxxxxxxxx>
In-reply-to: <20220606222058.86688-2-yosryahmed@google.com>
References: <20220606222058.86688-1-yosryahmed@google.com> <20220606222058.86688-2-yosryahmed@google.com>

On Mon, Jun 6, 2022 at 3:21 PM Yosry Ahmed <yosryahmed@xxxxxxxxxx> wrote:
>
> Add NR_SECONDARY_PAGETABLE stat to count secondary page table uses, e.g.
> KVM mmu. This provides more insights on the kernel memory used
> by a workload.
>
> This stat will be used by subsequent patches to count KVM mmu
> memory usage.
>
> Signed-off-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>

Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>

References:
- [PATCH v5 0/4] KVM: mm: count KVM mmu usage in memory stats
  - From: Yosry Ahmed
- [PATCH v5 1/4] mm: add NR_SECONDARY_PAGETABLE to count secondary page table uses.
  - From: Yosry Ahmed

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