On 06/15/2017 02:16 AM, Christoph Hellwig wrote: > On Wed, Jun 14, 2017 at 09:45:03PM -0600, Jens Axboe wrote: >> Useful to verify that things are working the way they should. >> Reading the file will return number of kb written to each >> stream. Writing the file will reset the statistics. No care >> is taken to ensure that we don't race on updates. >> >> Drivers will write to q->stream_writes[] if they handle a stream. > > What's blk-mq specific about this? Seems like this either should > be generic block or nvme specific, but probably not blk-mq. And > of course the name should change with the rest of the names now. There is nothing blk-mq specific about it, but it's a handy place to stick some debug data, as we don't have debugfs support for non blk-mq. I'm fine with even dumping this, but it's useful for debugging that things are being passed all the way through correctly for now. -- Jens Axboe
