Hi, For request/response type scenarios, it's not uncommon to have the send/write be of less interesting than new incoming recv/reads. Yet it's not quite possible to wait for only recv/reads when an application does: io_uring_submit_and_wait(ring, nr_to_wait_for); or any of the other variants of submit_and_wait() helpers. The application may attempt to count up the sends manually and include them in the 'nr_to_wait_for', however even that isn't infallible as that would also ignore failed/short sends/writes. This adds support for ignoring inline completions. Note that while this doesn't catch all scenarios where a send/write can complete, it does catch the interesting ones - the ones that complete fully as part of normal submission. With that, it's possible to simply ignore the expected inline completions that naturally happen as part of a submit and wait scenario. Patch 1 adds the general simple infrastructure for this, and patch 2+3 adds support for send/sendmsg/sendzc. For those, they have to set a send specific flag, IORING_SEND_IGNORE_INLINE, to have it be enabled for those requests. Comments welcome! include/linux/io_uring_types.h | 4 ++++ include/uapi/linux/io_uring.h | 8 ++++++++ io_uring/io_uring.c | 12 +++++++++--- io_uring/io_uring.h | 2 ++ io_uring/net.c | 16 ++++++++++++++-- 5 files changed, 37 insertions(+), 5 deletions(-) -- Jens Axboe
