[RFC PATCH 0/1] io_uring: mixed sqe support

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

The CQ supports mixed size entries, so why not do it for SQ's too? There
are use cases that currently allocate different queues just to keep
these things separated, but we can efficiently handle both cases in a
single ring.

This RFC is taking the last SQE flags bit for the purpose. That might
not be okay, but serves as a proof of concept for a first look.

Keith Busch (1):
  io_uring: add support for IORING_SETUP_SQE_MIXED

 include/uapi/linux/io_uring.h |  9 +++++++++
 io_uring/fdinfo.c             | 21 ++++++++++-----------
 io_uring/io_uring.c           | 15 ++++++++++++++-
 3 files changed, 33 insertions(+), 12 deletions(-)

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2.47.3