This is my current branch for converting the linux-aio interface to coroutines. I started this as a performance optimisation, but I think it also makes it much easier to avoid the recursive coroutine reentrace that Ming Lei has sent a relatively complex callback-based patch for. See patch 3 for a quick attempt on fixing the same problem in a coroutine-based linux-aio implementation.
Not ready to be merged mainly because of incomplete testing and benchmarking. v2: - Added patches 4-6 for handling of -EAGAIN and partial submits so that Ming Lei has a comparison to all of his callback-based series Kevin Wolf (6): qemu-img bench raw-posix: Convert Linux AIO submission to coroutines linux-aio: Don't reenter request coroutine recursively linux-aio: Support partial io_submits linux-aio: On -EAGAIN, wait for completions linux-aio: Queue requests instead of returning -EAGAIN block/linux-aio.c | 159 +++++++++++++++++++++++++++---------------------- block/raw-aio.h | 5 +- block/raw-posix.c | 62 +++++++++---------- qemu-img-cmds.hx | 6 ++ qemu-img.c | 174 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ qemu-img.texi | 10 ++++ 6 files changed, 309 insertions(+), 107 deletions(-) -- 1.8.3.1
