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SubjectRe: [PATCH v3 0/2] KVM: x86/mmu: Skip mmu_notifier changes when possible
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@redhat.com> 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
>

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