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Message-ID: <20250317135742.4331-1-sidong.yang@furiosa.ai>
Date: Mon, 17 Mar 2025 13:57:37 +0000
From: Sidong Yang <sidong.yang@...iosa.ai>
To: Josef Bacik <josef@...icpanda.com>,
David Sterba <dsterba@...e.com>,
Jens Axboe <axboe@...nel.dk>,
Pavel Begunkov <asml.silence@...il.com>
Cc: linux-btrfs@...r.kernel.org,
linux-kernel@...r.kernel.org,
io-uring@...r.kernel.org,
Sidong Yang <sidong.yang@...iosa.ai>
Subject: [RFC PATCH v4 0/5] introduce io_uring_cmd_import_fixed_vec
This patche series introduce io_uring_cmd_import_vec. With this function,
Multiple fixed buffer could be used in uring cmd. It's vectored version
for io_uring_cmd_import_fixed(). Also this patch series includes a usage
for new api for encoded read/write in btrfs by using uring cmd.
There was approximately 10 percent of performance improvements through benchmark.
The benchmark code is in
https://github.com/SidongYang/btrfs-encoded-io-test/blob/main/main.c
./main -l
Elapsed time: 0.598997 seconds
./main -l -f
Elapsed time: 0.540332 seconds
Additionally, There is a commit that fixed a memory bug in btrfs uring encoded
read.
v2:
- don't export iou_vc, use bvec for btrfs
- use io_is_compat for checking compat
- reduce allocation/free for import fixed vec
v3:
- add iou_vec cache in io_uring_cmd and use it
- also encoded write fixed supported
v4:
- add a patch that introduce io_async_cmd
- add a patch that fixes a bug in btrfs encoded read
Sidong Yang (5):
io_uring/cmd: introduce io_async_cmd for hide io_uring_cmd_data
io-uring/cmd: add iou_vec field for io_uring_cmd
io-uring/cmd: introduce io_uring_cmd_import_fixed_vec
btrfs: ioctl: introduce btrfs_uring_import_iovec()
btrfs: ioctl: don't free iov when -EAGAIN in uring encoded read
fs/btrfs/ioctl.c | 35 ++++++++++++++++-----
include/linux/io_uring/cmd.h | 14 +++++++++
io_uring/io_uring.c | 4 +--
io_uring/opdef.c | 3 +-
io_uring/uring_cmd.c | 60 +++++++++++++++++++++++++++++++-----
io_uring/uring_cmd.h | 10 ++++++
6 files changed, 108 insertions(+), 18 deletions(-)
--
2.43.0
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