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 in btrfs by using uring cmd. Sidong Yang (2): io_uring: cmd: introduce io_uring_cmd_import_fixed_vec btrfs: ioctl: use registered buffer for IORING_URING_CMD_FIXED fs/btrfs/ioctl.c | 26 +++++++++++++++++++++----- include/linux/io_uring/cmd.h | 14 ++++++++++++++ io_uring/uring_cmd.c | 29 +++++++++++++++++++++++++++++ 3 files changed, 64 insertions(+), 5 deletions(-) --- Recently, I've found that io_import_reg_vec() was added for io-uring. I think it could be used for io-uring cmd. I've tested for btrfs encoded read and it works. But it seems that there is no performance improvements and I'll keep find why. If there is no need to use fixed buffer for btrfs, I think it's good to use for nvme. 2.43.0
