svn commit: r258869 - head/sys/kern

[John Baldwin]

Author: jhb
Date: Tue Dec  3 14:50:12 2013
New Revision: 258869
URL: http://svnweb.freebsd.org/changeset/base/258869

Log:
  Fix an off-by-one error in r228960.  The maximum priority delta provided
  by SCHED_PRI_TICKS should be SCHED_PRI_RANGE - 1 so that the resulting
  priority value (before nice adjustment) is between SCHED_PRI_MIN and
  SCHED_PRI_MAX, inclusive.
  
  Submitted by:	kib
  Reported by:	pho
  MFC after:	1 week

Modified:
  head/sys/kern/sched_ule.c

Modified: head/sys/kern/sched_ule.c
==============================================================================
--- head/sys/kern/sched_ule.c	Tue Dec  3 13:38:13 2013	(r258868)
+++ head/sys/kern/sched_ule.c	Tue Dec  3 14:50:12 2013	(r258869)
@@ -1532,7 +1532,7 @@ sched_priority(struct thread *td)
 		pri = SCHED_PRI_MIN;
 		if (td->td_sched->ts_ticks)
 			pri += min(SCHED_PRI_TICKS(td->td_sched),
-			    SCHED_PRI_RANGE);
+			    SCHED_PRI_RANGE - 1);
 		pri += SCHED_PRI_NICE(td->td_proc->p_nice);
 		KASSERT(pri >= PRI_MIN_BATCH && pri <= PRI_MAX_BATCH,
 		    ("sched_priority: invalid priority %d: nice %d, "