| From: |
| Sidong Yang <sidong.yang-AT-furiosa.ai> |
| To: |
| Josef Bacik <josef-AT-toxicpanda.com>, David Sterba <dsterba-AT-suse.com>, Jens Axboe <axboe-AT-kernel.dk>, Pavel Begunkov <asml.silence-AT-gmail.com> |
| Subject: |
| [RFC PATCH v5 0/5] introduce io_uring_cmd_import_fixed_vec |
| Date: |
| Wed, 19 Mar 2025 06:12:46 +0000 |
| Message-ID: |
| <20250319061251.21452-1-sidong.yang@furiosa.ai> |
| Cc: |
| linux-btrfs-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, io-uring-AT-vger.kernel.org, Sidong Yang <sidong.yang-AT-furiosa.ai> |
| Archive-link: |
| Article |
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 -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
v5:
- use Pavel's original patches rebased for axboe/for-6.15/io_uring-reg-vec
- pop a patch that fixes btrfs encoded read
Pavel Begunkov (4):
io_uring: rename the data cmd cache
io_uring/cmd: don't expose entire cmd async data
io_uring/cmd: add iovec cache for commands
io_uring/cmd: introduce io_uring_cmd_import_fixed_vec
Sidong Yang (1):
btrfs: ioctl: introduce btrfs_uring_import_iovec()
fs/btrfs/ioctl.c | 34 ++++++++++++++------
include/linux/io_uring/cmd.h | 13 ++++++++
include/linux/io_uring_types.h | 2 +-
io_uring/io_uring.c | 6 ++--
io_uring/opdef.c | 3 +-
io_uring/uring_cmd.c | 59 +++++++++++++++++++++++++++++-----
io_uring/uring_cmd.h | 17 ++++++++++
7 files changed, 112 insertions(+), 22 deletions(-)
--
2.43.0
