cfq: choose a new next_req when a request is dispatched
This patch addresses http://bugzilla.kernel.org/show_bug.cgi?id=13401, a regression introduced in 2.6.30. From the bug report: Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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@ -1110,6 +1110,7 @@ static void cfq_dispatch_insert(struct request_queue *q, struct request *rq)
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cfq_log_cfqq(cfqd, cfqq, "dispatch_insert");
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cfq_log_cfqq(cfqd, cfqq, "dispatch_insert");
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cfqq->next_rq = cfq_find_next_rq(cfqd, cfqq, rq);
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cfq_remove_request(rq);
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cfq_remove_request(rq);
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cfqq->dispatched++;
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cfqq->dispatched++;
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elv_dispatch_sort(q, rq);
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elv_dispatch_sort(q, rq);
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