On 7/12/20 3:41 AM, Pavel Begunkov wrote: > Make io_kiocb slimmer by 24 bytes mainly by revising lists usage. The > drawback is adding extra kmalloc in draining path, but that's a slow > path, so meh. It also frees some space for the deferred completion path > if would be needed in the future, but the main idea here is to shrink it > to 3 cachelines in the end. > > I'm not happy yet with a few details, so that's not final, but it would > be lovely to hear some feedback. I think it looks pretty good, most of the changes are straight forward. Adding a completion entry that shares the submit space is a good idea, and really helps bring it together. >From a quick look, the only part I'm not super crazy about is patch #3. I'd probably rather use a generic list name and not unionize the tw lists. -- Jens Axboe
