Hello, Jens. On Mon, Jun 02, 2014 at 08:29:27AM -0600, Jens Axboe wrote: > One thing I've neglected to bring up but have been thinking about - we're > quickly getting to the point where the old request_fn IO path will become a > legacy thing, mostly in maintenance mode. That isn't a problem for morphing > bfq and cfq, but it does mean that development efforts in this area would be > a lot better spent writing an IO scheduler that fits into the blk-mq > framework instead. What I'm planning right now is improving blkcg so that it can do both proportional and hard limits with high cpu scalability, most likely using percpu charge caches. It probably would be best to roll all those into one piece of logic. I don't think, well at least hope, that we'd need multiple modular scheduler / blkcg implementations for blk-mq and both can be served by built-in scheduling logic. Regardless of device speed, we'd need some form of fairness enforcement after all. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
