linux-kernel - Re: [PATCH v6 4/4] KVM: arm64/mmu: count KVM s2 mmu usage in secondary pagetable stats

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Message-ID: <87zghv2248.wl-maz@kernel.org>
Date:   Wed, 29 Jun 2022 11:30:31 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Yosry Ahmed <yosryahmed@...gle.com>
Cc:     Tejun Heo <tj@...nel.org>, Johannes Weiner <hannes@...xchg.org>,
        Zefan Li <lizefan.x@...edance.com>,
        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>,
        Shakeel Butt <shakeelb@...gle.com>,
        Oliver Upton <oupton@...gle.com>, Huang@...gle.com,
        Shaoqin <shaoqin.huang@...el.com>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
        linux-mm@...ck.org, Oliver Upton <oliver.upton@...ux.dev>
Subject: Re: [PATCH v6 4/4] KVM: arm64/mmu: count KVM s2 mmu usage in secondary pagetable stats

On Tue, 28 Jun 2022 23:09:38 +0100,
Yosry Ahmed <yosryahmed@...gle.com> wrote:
> 
> Count the pages used by KVM in arm64 for stage2 mmu in memory stats
> under secondary pagetable stats (e.g. "SecPageTables" in /proc/meminfo)
> to give better visibility into the memory consumption of KVM mmu in a
> similar way to how normal user page tables are accounted.
> 
> Signed-off-by: Yosry Ahmed <yosryahmed@...gle.com>
> Reviewed-by: Oliver Upton <oliver.upton@...ux.dev>

Reviewed-by: Marc Zyngier <maz@...nel.org>

	M.

-- 
Without deviation from the norm, progress is not possible.