Author: jhb
Date: Fri Dec 2 19:59:46 2011
New Revision: 228207
URL: http://svn.freebsd.org/changeset/base/228207
Log:
When changing the user priority of a thread, change the real priority
in addition to the user priority for threads whose current real priority
is equal to the previous user priority or if the new priority is a
real-time priority. This allows priority changes of other threads to
have an immediate effect.
MFC after: 2 weeks
Modified:
head/sys/kern/kern_resource.c
Modified: head/sys/kern/kern_resource.c
==============================================================================
--- head/sys/kern/kern_resource.c Fri Dec 2 19:56:46 2011
(r228206)
+++ head/sys/kern/kern_resource.c Fri Dec 2 19:59:46 2011
(r228207)
@@ -488,8 +488,9 @@ rtp_to_pri(struct rtprio *rtp, struct th
sched_class(td, rtp->type); /* XXX fix */
oldpri = td->td_user_pri;
sched_user_prio(td, newpri);
- if (curthread == td)
- sched_prio(curthread, td->td_user_pri); /* XXX dubious */
+ if (td->td_user_pri != oldpri && (td == curthread ||
+ td->td_priority == oldpri || td->td_user_pri >= PRI_MAX_REALTIME))
+ sched_prio(td, td->td_user_pri);
if (TD_ON_UPILOCK(td) && oldpri != newpri) {
critical_enter();
thread_unlock(td);
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