On Sat, Mar 5, 2016 at 12:39 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > Btw, can someone explain why you guys waste so much time hacking and > arguing about a legacy codebase (old request code and I/O schedulers) > that everyone would really like to see disappear. Why don't you > spend your time on blk-mq where you have an entirely clean slate > for scheduling? Depends on what time horizon and target I'd say. Paolo was in contact with the MMC/SD subsystem maintainer Ulf Hansson. (e)MMC/SD are both synchronous command-response-based protocols, and as of today single-channel. So everone's smartphone and tablet etc are today single-channel. I don't know if there is even a protocol change coming to augment this, the only duct-tapeish solution I've heard about is command queueing which is basically a kind of pipelining of requests. So: large userbase in all things handheld. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
