Today, for each emulated MMIO operation, we have to lock the guest HPTE twice. One is in real mode and another is in virtual mode. This series aimed at reducing those MMIO HPTE locks, which will improve the IO scalability of emulated device, especially virtio device. Because currently almost all of virtio nofications(Port IO access) will hit the same HPTE. In this series, patch 1 fixed a bug on key field of HPTE; patch 2 tried to reduce MMIO HPTE locks and speed up MMIO emulation by keeping a per vcpu cache for recently page faulted MMIO entries. Yongji Xie (2): KVM: PPC: Book3S HV: Clear the key field of HPTE when the page is paged out KVM: PPC: Book3S HV: Add a per vcpu cache for recently page faulted MMIO entries arch/powerpc/include/asm/kvm_host.h | 21 ++++++ arch/powerpc/kvm/book3s_64_mmu_hv.c | 20 ++++++- arch/powerpc/kvm/book3s_hv.c | 9 +++ arch/powerpc/kvm/book3s_hv_rm_mmu.c | 120 +++++++++++++++++++++++++++++------ 4 files changed, 149 insertions(+), 21 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
