Re: [RFC V4 2/6] blk-wbt: make wbt pluggable

[Wang Jianchao]

On 2022/2/17 4:50 下午, Christoph Hellwig wrote:
>> +struct rq_qos *wbt_rq_qos(struct request_queue *q);
>>  int wbt_init(struct request_queue *);
> 
> 
> Please move the wb_lat sysfs attribute into blk-wbt.c as well, which
> removes the need to expose these two functions.
> 

Given this patchset:
(1) Do we need to reserve the wb_lat sysfs when we turn off the wbt ?
(2) Do we need to disable wbt automatically when switch io scheduler
    to bfq ? Or just tell the user turn off the wbt by themselves ?

Thanks
Jianchao