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* [PATCHSET v6 0/3] Add support for ring mapped provided buffers
@ 2022-05-16 16:21 Jens Axboe
  2022-05-16 16:21 ` [PATCH 1/3] io_uring: add buffer selection support to IORING_OP_NOP Jens Axboe
                   ` (3 more replies)
  0 siblings, 4 replies; 10+ messages in thread
From: Jens Axboe @ 2022-05-16 16:21 UTC (permalink / raw)
  To: io-uring; +Cc: asml.silence

Hi,

This series builds to adding support for a different way of doing
provided buffers, which is a lot more efficient than the existing scheme
for high rate of consumption/provision of buffers. The interesting bits
here are patch 3, which also has some performance numbers an an
explanation of it.

Patch 1 adds NOP support for provided buffers, just so that we can
benchmark the last change.

Patch 2 just abstracts out the pinning code.

Patch 3 adds the actual feature.

This passes the full liburing suite, and various test cases I adopted
to use ring provided buffers.

v6:
- Change layout so that 'head' overlaps with reserved field in first
  buffer, avoiding the weird split of first page having N-1 buffers and
  the rest N (Dylan)
- Rebase on current kernel bits
- Fix missing ring unlock on out-of-bufs
- Fix issue in io_recv()

Can also be found in my git repo, for-5.19/io_uring-pbuf branch:

https://git.kernel.dk/cgit/linux-block/log/?h=for-5.19/io_uring-pbuf

and there's an associated liburing branch too:

https://git.kernel.dk/cgit/liburing/log/?h=huge

 fs/io_uring.c                 | 323 +++++++++++++++++++++++++++++-----
 include/uapi/linux/io_uring.h |  36 ++++
 2 files changed, 319 insertions(+), 40 deletions(-)

-- 
Jens Axboe



^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2022-05-18 12:49 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-05-16 16:21 [PATCHSET v6 0/3] Add support for ring mapped provided buffers Jens Axboe
2022-05-16 16:21 ` [PATCH 1/3] io_uring: add buffer selection support to IORING_OP_NOP Jens Axboe
2022-05-16 16:21 ` [PATCH 2/3] io_uring: add io_pin_pages() helper Jens Axboe
2022-05-16 16:21 ` [PATCH 3/3] io_uring: add support for ring mapped supplied buffers Jens Axboe
2022-05-17 14:18   ` Hao Xu
2022-05-17 15:46     ` Jens Axboe
2022-05-18 10:50       ` Hao Xu
2022-05-18 12:48         ` Jens Axboe
2022-05-17 14:20 ` [PATCHSET v6 0/3] Add support for ring mapped provided buffers Hao Xu
2022-05-17 15:44   ` Jens Axboe

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