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?
+ ),
+
+ 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
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