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

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Message-ID: <CALvZod4XtEfdSjq=Jq51tvwXkpv-TKr32G6aeyjzcwxvdPv9SQ@mail.gmail.com>
Date:   Fri, 10 Jun 2022 12:55:31 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Yosry Ahmed <yosryahmed@...gle.com>
Cc:     Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Oliver Upton <oupton@...gle.com>,
        Cgroups <cgroups@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
        Linux MM <linux-mm@...ck.org>
Subject: Re: [PATCH v5 1/4] mm: add NR_SECONDARY_PAGETABLE to count secondary
 page table uses.

On Mon, Jun 6, 2022 at 3:21 PM Yosry Ahmed <yosryahmed@...gle.com> 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@...gle.com>

Acked-by: Shakeel Butt <shakeelb@...gle.com>