Release sched_lock very briefly to give interrupts a chance to fire if we

are in softclock() for a long time.  The old code already did an
splx()/slphigh() pair here, I just missed adding in the equivalent mutex
operations on sched_lock earlier.

1 files changed, 2 insertions, 0 deletions

diff --git a/sys/kern/kern_timeout.c b/sys/kern/kern_timeout.c
index 831fbac..58619a7 100644
--- a/sys/kern/kern_timeout.c
+++ b/sys/kern/kern_timeout.c
@@ -107,8 +107,10 @@ softclock(void *dummy)
 				if (steps >= MAX_SOFTCLOCK_STEPS) {
 					nextsoftcheck = c;
 					/* Give interrupts a chance. */
+					mtx_exit(&sched_lock, MTX_SPIN);
 					splx(s);
 					s = splhigh();
+					mtx_enter(&sched_lock, MTX_SPIN);
 					c = nextsoftcheck;
 					steps = 0;
 				}