On Sun, Oct 24, 2010 at 07:01:30PM +0200, Avi Kivity wrote:
> On 10/24/2010 04:49 PM, Gleb Natapov wrote:
> >Add tracepoint for userspace exit.
> >
> >
> >+
> >+TRACE_EVENT(kvm_userspace_exit,
> >+ TP_PROTO(__u32 reason, int errno),
> >+ TP_ARGS(reason, errno),
> >+
> >+ TP_STRUCT__entry(
> >+ __field( __u32, reason )
> >+ __field( int, errno )
> >+ ),
> >+
> >+ TP_fast_assign(
> >+ __entry->reason = reason;
> >+ __entry->errno = errno;
>
> Shouldn't this be -errno?
>
I check for __entry->errno < 0 below to see if exit was due to an error.
> >+ ),
> >+
> >+ TP_printk("reason %s (%d)",
> >+ __entry->errno< 0 ?
> >+ (__entry->errno == -EINTR ? "restart" : "error") :
> >+ __print_symbolic(__entry->reason, kvm_trace_exit_reason),
> >+ __entry->errno< 0 ? -__entry->errno : __entry->reason)
> >+);
> >+
> > #if defined(__KVM_HAVE_IOAPIC)
> > TRACE_EVENT(kvm_set_irq,
> > TP_PROTO(unsigned int gsi, int level, int irq_source_id),
> >diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> >index 361ad1a..88c42ae 100644
> >--- a/virt/kvm/kvm_main.c
> >+++ b/virt/kvm/kvm_main.c
> >@@ -1537,6 +1537,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
> > if (arg)
> > goto out;
> > r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
> >+ trace_kvm_userspace_exit(vcpu->run->exit_reason, r);
> > break;
>
> --
> error compiling committee.c: too many arguments to function
--
Gleb.
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