On 29.03.2022 16:34, Christoph Hellwig wrote: > On Mon, Mar 28, 2022 at 02:18:35PM +0300, Kirill Tkhai wrote: >> The driver is request based, since this allows to use blk-mq >> merging of request. Driver splits requests itself, and every >> request (i.e., qio) after splitting fits a single cluster. >> (In some cases it is worth to create bigger splits, and this >> is a subject of further optimizations). > > Nak, please don't do that. If you want finer grained processing use > a bio based driver, not a request based one. This is just getting us > into tons of problems. Could you explain what you mean? Why shouldn't I use generic bio merging code, but implementing my own merging? Which problems you point? Generic blk-mq is well tested and lots of people work on its performance. It's not obvious reason I should better implement own realization.
