linux-kernel - [PATCH 0/2] Add detailed page size stats in KVM stats

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Date:   Tue, 20 Jul 2021 22:12:45 -0700
From:   Mingwei Zhang <mizhang@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     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>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Ben Gardon <bgardon@...gle.com>,
        Mingwei Zhang <mizhang@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>
Subject: [PATCH 0/2] Add detailed page size stats in KVM stats

This commit basically adds detailed (large and regular) page size info to
KVM stats while preserves the existing metric: lpages.

To support legacy MMU and TDP mmu, we use atomic type for all page stats.

pre-v1 (internal reviewers):
 - use atomic in all page stats and use 'level' as index. [sean]
 - use an extra argument in kvm_update_page_stats for atomic/non-atomic.
   [bgardon]
 - should be careful on the difference between legacy mmu and tdp mmu.
   [jingzhangos]

Mingwei Zhang (2):
  kvm: mmu/x86: Remove redundant spte present check in mmu_set_spte
  kvm: mmu/x86: Add detailed page size stats

 arch/x86/include/asm/kvm_host.h |  9 ++++++
 arch/x86/kvm/mmu.h              |  2 ++
 arch/x86/kvm/mmu/mmu.c          | 53 +++++++++++++++++++++------------
 arch/x86/kvm/mmu/tdp_mmu.c      | 10 +++----
 arch/x86/kvm/x86.c              |  6 +++-
 5 files changed, 54 insertions(+), 26 deletions(-)

--
2.32.0.402.g57bb445576-goog