On Thu, Feb 24, 2022 at 05:06:40PM +0800, Wang Jianchao (Kuaishou) wrote: > This patch makes blk-rq-qos policies pluggable as following, > (1) Add code to maintain the rq_qos_ops. A rq-qos policy need to > register itself with rq_qos_register(). The original enum > rq_qos_id will be removed in following patch. They will use > a dynamic id maintained by rq_qos_ida. > (2) Add .init callback into rq_qos_ops. We use it to initialize the > resource. > (3) Add /sys/block/x/queue/qos > We can use '+name' or "-name" to open or close the blk-rq-qos > policy. > > This patch mainly prepare help interfaces and no functional changes. > Following patches will adpat the code of wbt, iolatency, iocost and > ioprio to make them pluggable one by one. And after that, the sysfs > interface /sys/block/xxx/queue/qos will be exported. > > Signed-off-by: Wang Jianchao (Kuaishou) <jianchao.wan9@xxxxxxxxx> As discussed before, the addition of new interface and custom module loading mechanism is unnecessary and undesirable. Nacked-by: Tejun Heo <tj@xxxxxxxxxx> Thanks. -- tejun
