sched_ule(4): Fix interactive threads stealing.
In scenarios when first thread in the queue can migrate to specified CPU, but later ones can't runq_steal_from() incorrectly returned NULL. MFC after: 2 weeks
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@ -1110,10 +1110,12 @@ runq_steal_from(struct runq *rq, int cpu, u_char start)
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continue;
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rqh = &rq->rq_queues[bit + (i << RQB_L2BPW)];
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TAILQ_FOREACH(td, rqh, td_runq) {
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if (first && THREAD_CAN_MIGRATE(td) &&
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THREAD_CAN_SCHED(td, cpu))
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return (td);
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first = td;
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if (first) {
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if (THREAD_CAN_MIGRATE(td) &&
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THREAD_CAN_SCHED(td, cpu))
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return (td);
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} else
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first = td;
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}
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}
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}
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