Hi Juri,
On 14/11/4 下午11:50, Juri Lelli wrote:
Hi,
On 04/11/14 15:46, Peter Zijlstra wrote:
On Tue, Nov 04, 2014 at 09:30:46PM +0800, Wanpeng Li wrote:
+ if (!rq->online) {
+ struct rq *latest_rq = NULL;
+ int cpu;
+ u64 dmin = LONG_MAX;
+
+ for_each_cpu(cpu, &p->cpus_allowed)
+ if (cpu_online(cpu) &&
+ cpu_rq(cpu)->dl.earliest_dl.curr < dmin) {
+ latest_rq = cpu_rq(cpu);
+ dmin = latest_rq->dl.earliest_dl.curr;
+ }
I would have expected something using find_later_rq(), but I might be
mistaken, I'll let Juri suggest something.
Yeah, we should be able to reuse something that we already have. I'm
actually sorry that I'm not responsive on this, but I'm really busy on
other things this week. I hope to be able to find some time soon to test
this all.
I have time to do it, your proposal is a great welcome. ;-)
Regards,
Wanpeng Li
Thanks,
- Juri
+
+ if (!latest_rq)
+ goto unlock;
+
+ raw_spin_lock(&latest_rq->lock);
+
+ deactivate_task(rq, p, 0);
+ set_task_cpu(p, latest_rq->cpu);
+ activate_task(latest_rq, p, 0);
+
+ raw_spin_unlock(&latest_rq->lock);
+ }
+
unlock:
raw_spin_unlock(&rq->lock);
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