- Pass the priority argument from *sleep() into sleepq and down into

   sched_sleep().  This removes extra thread_lock() acquisition and
   allows the scheduler to decide what to do with the static boost.
 - Change the priority arguments to cv_* to match sleepq/msleep/etc.
   where 0 means no priority change.  Catch -1 in cv_broadcastpri() and
   convert it to 0 for now.
 - Set a flag when sleeping in a way that is compatible with swapping
   since direct priority comparisons are meaningless now.
 - Add a sysctl to ule, kern.sched.static_boost, that defaults to on which
   controls the boost behavior.  Turning it off gives better performance
   in some workloads but needs more investigation.
 - While we're modifying sleepq, change signal and broadcast to both
   return with the lock held as the lock was held on enter.

Reviewed by:	jhb, peter

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/kern/kern_timeout.c b/sys/kern/kern_timeout.c
index d48bf2e..70d558c 100644
--- a/sys/kern/kern_timeout.c
+++ b/sys/kern/kern_timeout.c
@@ -563,7 +563,7 @@ again:
 				sleepq_add(&callout_wait,
 				    &callout_lock.lock_object, "codrain",
 				    SLEEPQ_SLEEP, 0);
-				sleepq_wait(&callout_wait);
+				sleepq_wait(&callout_wait, 0);
 				sq_locked = 0;
 
 				/* Reacquire locks previously released. */