Date: Thu, 27 Jan 2011 20:12:18 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r217976 - stable/8/sys/kern Message-ID: <201101272012.p0RKCIWi033936@svn.freebsd.org>
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Author: jhb Date: Thu Jan 27 20:12:18 2011 New Revision: 217976 URL: http://svn.freebsd.org/changeset/base/217976 Log: MFC 217077: 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. Modified: stable/8/sys/kern/kern_synch.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) Modified: stable/8/sys/kern/kern_synch.c ============================================================================== --- stable/8/sys/kern/kern_synch.c Thu Jan 27 20:09:20 2011 (r217975) +++ stable/8/sys/kern/kern_synch.c Thu Jan 27 20:12:18 2011 (r217976) @@ -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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