[Xen-devel] [PATCH 4 of 6 v2] xen: tracing: report where a VCPU wakes up

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

When looking at traces, it turns out to be useful to know where a
waking-up VCPU is being queued. Yes, that is always the CPU where
it ran last, but that information can well be lost in past trace
records!

Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

diff --git a/xen/common/schedule.c b/xen/common/schedule.c
--- a/xen/common/schedule.c
+++ b/xen/common/schedule.c
@@ -371,7 +371,7 @@ void vcpu_wake(struct vcpu *v)
 
     vcpu_schedule_unlock_irqrestore(v, flags);
 
-    TRACE_2D(TRC_SCHED_WAKE, v->domain->domain_id, v->vcpu_id);
+    TRACE_3D(TRC_SCHED_WAKE, v->domain->domain_id, v->vcpu_id, v->processor);
 }
 
 void vcpu_unblock(struct vcpu *v)

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