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* [RFC][PATCH 0/3] allow to skip CQE posting
@ 2021-09-11 13:51 Pavel Begunkov
  2021-09-11 13:52 ` [PATCH 1/3] io_uring: clean cqe filling functions Pavel Begunkov
                   ` (3 more replies)
  0 siblings, 4 replies; 11+ messages in thread
From: Pavel Begunkov @ 2021-09-11 13:51 UTC (permalink / raw)
  To: Jens Axboe, io-uring

It's expensive enough to post an CQE, and there are other
reasons to want to ignore them, e.g. for link handling and
it may just be more convenient for the userspace.

Try to cover most of the use cases with one flag. The overhead
is one "if (cqe->flags & IOSQE_CQE_SKIP_SUCCESS)" check per
requests and a bit bloated req_set_fail(), should be bearable.

See 2/3 for the actual description of the flag.

Pavel Begunkov (3):
  io_uring: clean cqe filling functions
  io_uring: add option to skip CQE posting
  io_uring: don't spinlock when not posting CQEs

 fs/io_uring.c                 | 103 ++++++++++++++++++++++------------
 include/uapi/linux/io_uring.h |   3 +
 2 files changed, 70 insertions(+), 36 deletions(-)

-- 
2.33.0


^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2021-09-12 23:49 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-09-11 13:51 [RFC][PATCH 0/3] allow to skip CQE posting Pavel Begunkov
2021-09-11 13:52 ` [PATCH 1/3] io_uring: clean cqe filling functions Pavel Begunkov
2021-09-12 18:24   ` Hao Xu
2021-09-12 23:20     ` Pavel Begunkov
2021-09-11 13:52 ` [PATCH 2/3] io_uring: add option to skip CQE posting Pavel Begunkov
2021-09-11 13:52 ` [PATCH 3/3] io_uring: don't spinlock when not posting CQEs Pavel Begunkov
2021-09-11 20:12   ` Hao Xu
2021-09-11 21:10     ` Pavel Begunkov
2021-09-12 18:14       ` Hao Xu
2021-09-12 22:16         ` Pavel Begunkov
2021-09-12 23:49 ` [RFC][PATCH 0/3] allow to skip CQE posting Pavel Begunkov

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