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When checking to see if another CPU is running its idle thread, examine

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the thread running on the other CPU instead of the thread being placed on
the run queue.

Reported by:	Ravi Murty @ Intel
Reviewed by:	jeff
This commit is contained in:
John Baldwin 2008-11-18 05:41:34 +00:00
parent 7f792cd758
commit 02f0ff6d92
1 changed files with 4 additions and 4 deletions
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8
sys/kern/sched_ule.c
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@ -946,7 +946,7 @@ tdq_idled(struct tdq *tdq)
static void
tdq_notify(struct tdq *tdq, struct thread *td)
{
int cpri;
struct thread *ctd;
int pri;
int cpu;
@ -954,10 +954,10 @@ tdq_notify(struct tdq *tdq, struct thread *td)
return;
cpu = td->td_sched->ts_cpu;
pri = td->td_priority;
cpri = pcpu_find(cpu)->pc_curthread->td_priority;
if (!sched_shouldpreempt(pri, cpri, 1))
ctd = pcpu_find(cpu)->pc_curthread;
if (!sched_shouldpreempt(pri, ctd->td_priority, 1))
return;
if (TD_IS_IDLETHREAD(td)) {
if (TD_IS_IDLETHREAD(ctd)) {
/*
* If the idle thread is still 'running' it's probably
* waiting on us to release the tdq spinlock already. No