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Code Issues Releases Activity

Set TDF_NEEDRESCHED when a higher priority thread is scheduled in

Browse Source 
sched_add() rather than just doing it in sched_wakeup().  The old
ithread preemption code used to set NEEDRESCHED unconditionally if it
didn't preempt which masked this bug in SCHED_4BSD.

Noticed by:	jake
Reported by:	kensmith, marcel
This commit is contained in:
John Baldwin 2004-07-13 20:49:13 +00:00
parent 65a311fcb2
commit 6942d4339e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132118
1 changed files with 1 additions and 1 deletions
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2
sys/kern/sched_4bsd.c
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@ -694,7 +694,6 @@ sched_wakeup(struct thread *td)
updatepri(kg);
kg->kg_slptime = 0;
setrunqueue(td);
maybe_resched(td);
}
void
@ -740,6 +739,7 @@ sched_add(struct thread *td)
if ((td->td_proc->p_flag & P_NOLOAD) == 0)
sched_tdcnt++;
runq_add(ke->ke_runq, ke);
maybe_resched(td);
}
void