D30935.id98345.diff
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	Index: sys/xen/xen_intr.c
	===================================================================
	--- sys/xen/xen_intr.c
	+++ sys/xen/xen_intr.c
	@@ -282,7 +282,7 @@

	if (isrc != NULL) {
	mtx_unlock(&xen_intr_x86_lock);
	- return (isrc);
	+ goto out;
	}

	if (xen_intr_auto_vector_count >= NR_EVENT_CHANNELS) {
	@@ -310,6 +310,18 @@
	return (NULL);
	}

	+out:
	+#ifdef SMP
	+ if (type == EVTCHN_TYPE_PORT) {
	+ /*
	+ * By default all interrupts are assigned to vCPU#0
	+ * unless specified otherwise, so shuffle them to balance
	+ * the interrupt load.
	+ */
	+ isrc->xi_cpu = intr_next_cpu(0);
	+ }
	+#endif
	+
	return (isrc);
	}

	@@ -413,12 +425,14 @@

	#ifdef SMP
	if (type == EVTCHN_TYPE_PORT) {
	+ int cpu = isrc->xi_cpu;
	+ isrc->xi_cpu = 0;
	/*
	* By default all interrupts are assigned to vCPU#0
	* unless specified otherwise, so shuffle them to balance
	* the interrupt load.
	*/
	- xen_intr_assign_cpu(isrc, intr_next_cpu(0));
	+ xen_intr_assign_cpu(isrc, cpu);
	}
	#endif