On 2022/2/17 11:21 上午, Jens Axboe wrote: > On 2/16/22 8:13 PM, Wang Jianchao (Kuaishou) wrote: >> Hi Jens >> >> blk-rq-qos is a standalone framework out of io-sched and can be used to >> control or observe the IO progress in block-layer with hooks. blk-rq-qos >> is a great design but right now, it is totally fixed and built-in and shut >> out peoples who want to use it with external module. >> >> This patchset attempts to make blk-rq-qos framework pluggable and modular. >> Then we can update the blk-rq-qos policy module w/o stopping the IO workload. >> And it is more convenient to introduce new policy on old machines w/o udgrade >> kernel. And we can close all of the blk-rq-qos policy if we needn't any of >> them. At the moment, the request_queue.rqos list is empty, we needn't to >> waste cpu cyles on them. > > I like this patchset, would be a lot more convenient and helps > efficiency. > > What kind of testing have you done on it? > I have run blktests against this patchset in a VM machine along with a new test case for switching rqos policies while running IO. https://marc.info/?l=linux-block&m=164506848620632&w=2 And also there is a bit different version running on v4.18 with more tests Thanks Jianchao
