Index: sys/kern/kern_cpu.c
===================================================================
--- sys/kern/kern_cpu.c
+++ sys/kern/kern_cpu.c
@@ -245,6 +245,7 @@
 	struct cf_saved_freq *saved_freq, *curr_freq;
 	struct pcpu *pc;
 	int error, i;
+	u_char pri;
 
 	sc = device_get_softc(dev);
 	error = 0;
@@ -333,6 +334,8 @@
 		/* Bind to the target CPU before switching. */
 		pc = cpu_get_pcpu(set->dev);
 		thread_lock(curthread);
+		pri = curthread->td_priority;
+		sched_lend_prio(curthread, PI_NET - 1);
 		sched_bind(curthread, pc->pc_cpuid);
 		thread_unlock(curthread);
 		CF_DEBUG("setting abs freq %d on %s (cpu %d)\n", set->freq,
@@ -340,6 +343,7 @@
 		error = CPUFREQ_DRV_SET(set->dev, set);
 		thread_lock(curthread);
 		sched_unbind(curthread);
+		sched_unlend_prio(curthread, pri);
 		thread_unlock(curthread);
 		if (error) {
 			goto out;
@@ -357,6 +361,8 @@
 		/* Bind to the target CPU before switching. */
 		pc = cpu_get_pcpu(set->dev);
 		thread_lock(curthread);
+		pri = curthread->td_priority;
+		sched_lend_prio(curthread, PI_NET - 1);
 		sched_bind(curthread, pc->pc_cpuid);
 		thread_unlock(curthread);
 		CF_DEBUG("setting rel freq %d on %s (cpu %d)\n", set->freq,
@@ -364,6 +370,7 @@
 		error = CPUFREQ_DRV_SET(set->dev, set);
 		thread_lock(curthread);
 		sched_unbind(curthread);
+		sched_unlend_prio(curthread, pri);
 		thread_unlock(curthread);
 		if (error) {
 			/* XXX Back out any successful setting? */