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From: Kanchan Joshi <joshi.k@samsung.com>
To: axboe@kernel.dk, hch@lst.de
Cc: io-uring@vger.kernel.org, linux-nvme@lists.infradead.org,
asml.silence@gmail.com, ming.lei@redhat.com, mcgrof@kernel.org,
pankydev8@gmail.com, javier@javigon.com, joshiiitr@gmail.com,
anuj20.g@samsung.com
Subject: [RFC 0/5] big-cqe based uring-passthru
Date: Fri, 1 Apr 2022 16:33:05 +0530
Message-Id: <20220401110310.611869-1-joshi.k@samsung.com>
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So this is a trimmed-down series primarily to test the
waters with 32-byte CQE (patch 4).
This big-cqe is created by combining two adjacent 16b CQEs.
And that is done when ring is setup with IORING_SETUP_CQE32 flag.
nvme-passthru sends one result to bigcqe->res and another result (8 bytes)
gets updated to bigcqe->res2.
As always, fio is modified to test the interface:
https://github.com/joshkan/fio/tree/big-cqe
Limited testing ATM, as plumbing itself is in early stage with patch 4.
Patches are against for-next (linux-block),
on top of 9e9d83faa ("io_uring: Remove unneeded test in io_run_task_work_sig")
Jens Axboe (3):
io_uring: add support for 128-byte SQEs
fs: add file_operations->async_cmd()
io_uring: add infra and support for IORING_OP_URING_CMD
Kanchan Joshi (2):
io_uring: add support for big-cqe
nvme: wire-up support for async-passthru on char-device.
drivers/nvme/host/core.c | 1 +
drivers/nvme/host/ioctl.c | 187 ++++++++++++++++++++++++++++------
drivers/nvme/host/multipath.c | 1 +
drivers/nvme/host/nvme.h | 3 +
fs/io_uring.c | 168 ++++++++++++++++++++++++++----
include/linux/fs.h | 2 +
include/linux/io_uring.h | 33 ++++++
include/uapi/linux/io_uring.h | 26 ++++-
8 files changed, 369 insertions(+), 52 deletions(-)
--
2.25.1