- 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/sys/sched.h b/sys/sys/sched.h
index 57eebd9..ca7bfc9 100644
--- a/sys/sys/sched.h
+++ b/sys/sys/sched.h
@@ -100,7 +100,7 @@ void	sched_lend_prio(struct thread *td, u_char prio);
 void	sched_lend_user_prio(struct thread *td, u_char pri);
 fixpt_t	sched_pctcpu(struct thread *td);
 void	sched_prio(struct thread *td, u_char prio);
-void	sched_sleep(struct thread *td);
+void	sched_sleep(struct thread *td, int prio);
 void	sched_switch(struct thread *td, struct thread *newtd, int flags);
 void	sched_throw(struct thread *td);
 void	sched_unlend_prio(struct thread *td, u_char prio);