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From: Jens Axboe <[email protected]>
To: [email protected]
Subject: [PATCHSET v2 0/3] Provide more efficient buffer registration
Date: Wed, 11 Sep 2024 14:29:38 -0600	[thread overview]
Message-ID: <[email protected]> (raw)

Hi,

Pretty much what the subject line says, it's about 25k to 40k times
faster to provide a way to duplicate an existing rings buffer
registration than it is manually map/pin/register the buffers again
with a new ring.

Patch 1 is just a prep patch, patch 2 adds refs to struct
io_mapped_ubuf, and patch 3 finally adds the register opcode to allow
a ring to duplicate the registered mappings from one ring to another.

This came about from discussing overhead from the varnish cache
project for cases with more dynamic ring/thread creation.

Since v1:
- Actually send out the right version...

 include/uapi/linux/io_uring.h |  8 +++
 io_uring/register.c           |  6 +++
 io_uring/rsrc.c               | 95 ++++++++++++++++++++++++++++++++++-
 io_uring/rsrc.h               |  2 +
 4 files changed, 110 insertions(+), 1 deletion(-)

-- 
Jens Axboe


             reply	other threads:[~2024-09-11 20:30 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-09-11 20:29 Jens Axboe [this message]
2024-09-11 20:29 ` [PATCH 1/3] io_uring/rsrc: clear 'slot' entry upfront Jens Axboe
2024-09-11 20:29 ` [PATCH 2/3] io_uring/rsrc: add reference count to struct io_mapped_ubuf Jens Axboe
2024-09-11 20:29 ` [PATCH 3/3] io_uring: add IORING_REGISTER_COPY_BUFFERS method Jens Axboe

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