This patch series adds support for the newly developed io_uring Linux AIO interface. Linux io_uring is faster than Linux's AIO asynchronous I/O code, offers efficient buffered asynchronous I/O support, the ability to do I/O without performing a system call via polled I/O, and other efficiency enhancements. It is expected that it will replace the old AIO interface
Testing it requires a host kernel 5.1 or newer and the liburing library. Use the option -drive aio=io_uring to enable it. v2: - Fix Patchew errors - Option now enumerates only for CONFIG_LINUX in qapi - Removed redudant and broken code in io_uring - io_uring now aborts on sqe leak Aarushi Mehta (9): qapi/block-core: add option for io_uring block/block: add BDRV flag for io_uring include/block: declare interfaces for io_uring stubs: add aio interface stubs for io_uring util/async: add aio interfaces for io_uring block/io_uring: implements interfaces for io_uring blockdev: accept io_uring as option block/file-posix: extends to use with io_uring configure: permit use of io_uring MAINTAINERS | 11 ++ block/Makefile.objs | 2 + block/file-posix.c | 63 ++++++++- block/io_uring.c | 306 ++++++++++++++++++++++++++++++++++++++++ blockdev.c | 4 +- configure | 27 ++++ include/block/aio.h | 16 ++- include/block/block.h | 1 + include/block/raw-aio.h | 15 ++ qapi/block-core.json | 6 +- stubs/Makefile.objs | 1 + stubs/io_uring.c | 32 +++++ util/async.c | 36 +++++ 13 files changed, 511 insertions(+), 9 deletions(-) create mode 100644 block/io_uring.c create mode 100644 stubs/io_uring.c -- 2.17.1
