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From: Mingwei Zhang <mizhang@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Ben Gardon <bgardon@google.com>,
	Mingwei Zhang <mizhang@google.com>,
	Jing Zhang <jingzhangos@google.com>,
	David Matlack <dmatlack@google.com>
Subject: [PATCH v3 0/3] Add detailed page size stats in KVM stats
Date: Fri, 30 Jul 2021 15:59:36 -0700	[thread overview]
Message-ID: <20210730225939.3852712-1-mizhang@google.com> (raw)

This commit basically adds detailed (large and regular) page size info to
KVM stats and deprecate the old one: lpages.

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

v2 -> v3:
 - move kvm_update_page_stats to mmu.h as a static inline function. [sean]
 - remove is_last_spte check in mmu_spte_clear_track_bits. [bgardon]
 - change page_stats union by making it anonymous. [dmatlack]

v1 -> v2:
 - refactor kvm_update_page_stats and remove 'spte' argument. [sean]
 - remove 'lpages' as it can be aggregated by user level [sean]
 - fix lpages stats update issue in __handle_change_pte [sean]
 - fix style issues and typos. [ben/sean]

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 (3):
  kvm: mmu/x86: Remove redundant spte present check in mmu_set_spte
  KVM: x86/mmu: Avoid collision with !PRESENT SPTEs in TDP MMU lpage
    stats
  kvm: mmu/x86: Add detailed page size stats

 arch/x86/include/asm/kvm_host.h | 10 +++++++-
 arch/x86/kvm/mmu.h              |  2 ++
 arch/x86/kvm/mmu/mmu.c          | 42 ++++++++++++++++++---------------
 arch/x86/kvm/mmu/tdp_mmu.c      |  9 ++-----
 arch/x86/kvm/x86.c              |  7 ++++--
 5 files changed, 41 insertions(+), 29 deletions(-)

--
2.32.0.432.gabb21c7263-goog


             reply	other threads:[~2021-07-30 22:59 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30 22:59 Mingwei Zhang [this message]
2021-07-30 22:59 ` [PATCH v3 1/3] KVM: x86/mmu: Remove redundant spte present check in mmu_set_spte Mingwei Zhang
2021-08-02 22:29   ` David Matlack
2021-07-30 22:59 ` [PATCH v3 2/3] KVM: x86/mmu: Avoid collision with !PRESENT SPTEs in TDP MMU lpage stats Mingwei Zhang
2021-08-02 22:40   ` David Matlack
2021-07-30 22:59 ` [PATCH v3 3/3] KVM: x86/mmu: Add detailed page size stats Mingwei Zhang
2021-08-02 22:41   ` David Matlack
2021-08-02 23:02   ` Sean Christopherson
2021-08-02 23:45     ` Mingwei Zhang

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