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Index: head/sys/kern/kern_cpu.c
===================================================================
--- head/sys/kern/kern_cpu.c
+++ head/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_prio(curthread, PRI_MIN);
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_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_prio(curthread, PRI_MIN);
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_prio(curthread, pri);
thread_unlock(curthread);
if (error) {
/* XXX Back out any successful setting? */

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