linux-kernel - [PATCH v2 0/2] KVM: Don't take mmu_lock for range invalidation unless necessary

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Message-Id: <20210727171808.1645060-1-pbonzini@redhat.com>
Date:   Tue, 27 Jul 2021 13:18:06 -0400
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     seanjc@...gle.com
Subject: [PATCH v2 0/2] KVM: Don't take mmu_lock for range invalidation unless necessary

This is my take on Sean's patch to restrict taking the mmu_lock in the
MMU notifiers.  The first patch includes the locking changes, while
the second is the optimization.

v1->v2: moved the "if (!kvm->mmu_notifier_count)" early return to patch 2

Paolo Bonzini (1):
  KVM: Block memslot updates across range_start() and range_end()

Sean Christopherson (1):
  KVM: Don't take mmu_lock for range invalidation unless necessary

 Documentation/virt/kvm/locking.rst |  6 +++
 include/linux/kvm_host.h           | 10 +++-
 virt/kvm/kvm_main.c                | 79 ++++++++++++++++++++++++------
 3 files changed, 78 insertions(+), 17 deletions(-)

-- 
2.27.0