Messages in this thread | | | Date | Mon, 12 Dec 2016 14:27:47 +0300 | From | Roman Kagan <> | Subject | Re: [PATCH v2] KVM: hyperv: fix locking of struct kvm_hv fields |
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On Mon, Dec 12, 2016 at 10:12:53AM +0100, Paolo Bonzini wrote: > Introduce a new mutex to avoid an AB-BA deadlock between kvm->lock and > vcpu->mutex. Protect accesses in kvm_hv_setup_tsc_page too, as suggested > by Roman. > > Reported-by: Dmitry Vyukov <dvyukov@google.com> > Cc: Roman Kagan <rkagan@virtuozzo.com> > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> > --- > Documentation/virtual/kvm/locking.txt | 8 ++++++-- > arch/x86/include/asm/kvm_host.h | 1 + > arch/x86/kvm/hyperv.c | 24 +++++++++++++++--------- > arch/x86/kvm/x86.c | 1 + > 4 files changed, 23 insertions(+), 11 deletions(-)
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
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