2016-10-13 13:10+0200, Paolo Bonzini: > This is long overdue, and not really hard. > > Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> > ---
Applied to kvm/queue, thanks. > Documentation/virtual/kvm/locking.txt | 12 +++++++++++- > 1 file changed, 11 insertions(+), 1 deletion(-) > > diff --git a/Documentation/virtual/kvm/locking.txt > b/Documentation/virtual/kvm/locking.txt > index f2491a8c68b4..e5dd9f4d6100 100644 > --- a/Documentation/virtual/kvm/locking.txt > +++ b/Documentation/virtual/kvm/locking.txt > @@ -4,7 +4,17 @@ KVM Lock Overview > 1. Acquisition Orders > --------------------- > > -(to be written) > +The acquisition orders for mutexes are as follows: > + > +- kvm->lock is taken outside vcpu->mutex > + > +- kvm->lock is taken outside kvm->slots_lock and kvm->irq_lock > + > +- kvm->slots_lock is taken outside kvm->irq_lock, though acquiring > + them together is quite rare. > + > +For spinlocks, kvm_lock is taken outside kvm->mmu_lock. Everything > +else is a leaf: no other lock is taken inside the critical sections. > > 2: Exception > ------------ > -- > 2.7.4 >
