Re: [PATCH 16/28] blk-cgroup: remove legacy queue bypassing

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On 10/29/18 5:00 AM, Johannes Thumshirn wrote:
> Hi Jens,
> 
> On 25/10/18 23:10, Jens Axboe wrote:
> [...]
>> @@ -1487,8 +1485,6 @@ int blkcg_activate_policy(struct request_queue *q,
>>  out_bypass_end:
>>  	if (q->mq_ops)
>>  		blk_mq_unfreeze_queue(q);
>> -	else
>> -		blk_queue_bypass_end(q);
> 
>>  
>>
> 
> Now that we only have mq, do we still need all these checks for q->mq_ops?

We need it for the cases where we can be passing in a stacked driver
or an mq driver, or for cases where we explicitly register mq attributes,
and that sort of thing.

-- 
Jens Axboe




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