Hi Ming

Thanks for your kindly response.

On 04/16/2018 04:15 PM, Ming Lei wrote:
>> -            if (!blk_mq_get_dispatch_budget(hctx))
>> +            if (!blk_mq_get_dispatch_budget(hctx)) {
>> +                    blk_mq_sched_mark_restart_hctx(hctx);
> The RESTART flag still may not take into effect if all requests are
> completed before calling blk_mq_sched_mark_restart_hctx().
> 

Yes, this is indeed a very tricky scenario.

Sincerely
Jianchao

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