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
