On Thu, Oct 07, 2010 at 07:56:55PM +0200, Gleb Natapov wrote:
> > > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> > > index b8499f5..8800713 100644
> > > --- a/virt/kvm/kvm_main.c
> > > +++ b/virt/kvm/kvm_main.c
> > > @@ -1458,6 +1458,8 @@ static long kvm_vcpu_ioctl(struct file *filp,
> > > if (arg)
> > > goto out;
> > > r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
> > > + if (r >= 0)
> > > + trace_kvm_userspace_exit(vcpu->run->exit_reason);
> > > break;
> > > case KVM_GET_REGS: {
> > > struct kvm_regs *kvm_regs;
> > > --
> > > Gleb.
> >
> > Exit codes are also valid for r == -EINTR and -EAGAIN cases, eg
> > EXIT_INTR. Better print it out for all cases, and let the reader
> > decide whether exit_reason is valid.
> Are they? I see that userspace does not look into run->exit_reason in
> case of -EINTR and -EAGAIN.
Not userspace, but for a human reader. Otherwise the trace information
is incomplete and confusing.
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