On 2/8/19 6:34 PM, Jens Axboe wrote:
Add support for a polled io_uring instance. When a read or write is
submitted to a polled io_uring, the application must poll for
completions on the CQ ring through io_uring_enter(2). Polled IO may not
generate IRQ completions, hence they need to be actively found by the
application itself.
To use polling, io_uring_setup() must be used with the
IORING_SETUP_IOPOLL flag being set. It is illegal to mix and match
polled and non-polled IO on an io_uring.
Signed-off-by: Jens Axboe <[email protected]>
---
fs/io_uring.c | 274 ++++++++++++++++++++++++++++++++--
include/uapi/linux/io_uring.h | 5 +
2 files changed, 270 insertions(+), 9 deletions(-)
Reviewed-by: Hannes Reinecke <[email protected]>
Cheers,
Hannes
