These patches might be responsible for some instability in one of our stress tests. I'll send an update once I figure out what's going on. Thanks, David On Thu, Jan 28, 2021 at 9:48 PM Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > > On 28/01/21 07:05, David Stevens wrote: > > These patches reduce how often mmu_notifier updates block guest page > > faults. The primary benefit of this is the reduction in the likelihood > > of extreme latency when handling a page fault due to another thread > > having been preempted while modifying host virtual addresses. > > > > v2 -> v3: > > - Added patch to skip check for MMIO page faults > > - Style changes > > > > David Stevens (1): > > KVM: x86/mmu: Consider the hva in mmu_notifier retry > > > > Sean Christopherson (1): > > KVM: x86/mmu: Skip mmu_notifier check when handling MMIO page fault > > > > arch/powerpc/kvm/book3s_64_mmu_hv.c | 2 +- > > arch/powerpc/kvm/book3s_64_mmu_radix.c | 2 +- > > arch/x86/kvm/mmu/mmu.c | 16 ++++++++------ > > arch/x86/kvm/mmu/paging_tmpl.h | 7 ++++--- > > include/linux/kvm_host.h | 25 +++++++++++++++++++++- > > virt/kvm/kvm_main.c | 29 ++++++++++++++++++++++---- > > 6 files changed, 65 insertions(+), 16 deletions(-) > > > > Queued, thanks. > > Paolo >
