svn commit: r217077 - head/sys/kern
John Baldwin
jhb at FreeBSD.org
Thu Jan 6 22:19:15 UTC 2011
Author: jhb
Date: Thu Jan 6 22:19:15 2011
New Revision: 217077
URL: http://svn.freebsd.org/changeset/base/217077
Log:
Only change the priority of timeshare threads to PRI_MAX_TIMESHARE
when yield() is called. Specifically, leave the priority of real time
and idle threads unchanged.
MFC after: 2 weeks
Modified:
head/sys/kern/kern_synch.c
Modified: head/sys/kern/kern_synch.c
==============================================================================
--- head/sys/kern/kern_synch.c Thu Jan 6 22:17:07 2011 (r217076)
+++ head/sys/kern/kern_synch.c Thu Jan 6 22:19:15 2011 (r217077)
@@ -546,7 +546,8 @@ yield(struct thread *td, struct yield_ar
{
thread_lock(td);
- sched_prio(td, PRI_MAX_TIMESHARE);
+ if (PRI_BASE(td->td_pri_class) == PRI_TIMESHARE)
+ sched_prio(td, PRI_MAX_TIMESHARE);
mi_switch(SW_VOL | SWT_RELINQUISH, NULL);
thread_unlock(td);
td->td_retval[0] = 0;
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