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* [RFC 0/9] scrap 24 bytes from io_kiocb
@ 2020-07-12  9:41 Pavel Begunkov
  2020-07-12  9:41 ` [PATCH 1/9] io_uring: share completion list w/ per-op space Pavel Begunkov
                   ` (9 more replies)
  0 siblings, 10 replies; 18+ messages in thread
From: Pavel Begunkov @ 2020-07-12  9:41 UTC (permalink / raw)
  To: Jens Axboe, io-uring

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.

Pavel Begunkov (9):
  io_uring: share completion list w/ per-op space
  io_uring: rename ctx->poll into ctx->iopoll
  io_uring: use inflight_entry list for iopolling
  io_uring: use competion list for CQ overflow
  io_uring: add req->timeout.list
  io_uring: remove init for unused list
  io_uring: kill rq->list and allocate it on demand
  io_uring: remove sequence from io_kiocb
  io_uring: place cflags into completion data

 fs/io_uring.c | 188 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 116 insertions(+), 72 deletions(-)

-- 
2.24.0


^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2020-07-13 21:00 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-07-12  9:41 [RFC 0/9] scrap 24 bytes from io_kiocb Pavel Begunkov
2020-07-12  9:41 ` [PATCH 1/9] io_uring: share completion list w/ per-op space Pavel Begunkov
2020-07-12  9:41 ` [PATCH 2/9] io_uring: rename ctx->poll into ctx->iopoll Pavel Begunkov
2020-07-12  9:41 ` [PATCH 3/9] io_uring: use inflight_entry list for iopolling Pavel Begunkov
2020-07-12  9:41 ` [PATCH 4/9] io_uring: use competion list for CQ overflow Pavel Begunkov
2020-07-12  9:41 ` [PATCH 5/9] io_uring: add req->timeout.list Pavel Begunkov
2020-07-12  9:41 ` [PATCH 6/9] io_uring: remove init for unused list Pavel Begunkov
2020-07-12  9:41 ` [PATCH 7/9] io_uring: kill rq->list and allocate it on demand Pavel Begunkov
2020-07-12  9:41 ` [PATCH 8/9] io_uring: remove sequence from io_kiocb Pavel Begunkov
2020-07-12  9:41 ` [PATCH 9/9] io_uring: place cflags into completion data Pavel Begunkov
2020-07-12 15:59 ` [RFC 0/9] scrap 24 bytes from io_kiocb Jens Axboe
2020-07-12 17:34   ` Pavel Begunkov
2020-07-12 20:32     ` Jens Axboe
2020-07-13  8:17       ` Pavel Begunkov
2020-07-13  8:17       ` Pavel Begunkov
2020-07-13 14:12         ` Jens Axboe
2020-07-13 20:45           ` Pavel Begunkov
2020-07-13 21:00             ` Jens Axboe

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