On 6/15/22 5:38 AM, Pavel Begunkov wrote: >>>> Another way is to also set IORING_SETUP_TASKRUN_FLAG, then when >>>> there is work that requires to enter the kernel io_uring will >>>> set IORING_SQ_TASKRUN in sq_flags. >>>> Actually, I'm not mistaken io_uring has some automagic handling >>>> of it internally >>>> >>>> https://github.com/axboe/liburing/blob/master/src/queue.c#L36 >>>> >> >> Is there documentation about this flag? > > Unfortunately, I don't see any. > Here is a link to the kernel commit if it helps: > > https://git.kernel.dk/cgit/linux-block/commit/?h=ef060ea9e4fd3b763e7060a3af0a258d2d5d7c0d > > I think it's more interesting what support liburing has, > but would need to look up in the code. Maybe Jens > remembers and can tell. It is documented, in the io_uring.2 man page in liburing: https://git.kernel.dk/cgit/liburing/tree/man/io_uring_setup.2#n200 -- Jens Axboe
