Hi, yeah thanks, there is already a fix patch from Jens [PATCH] io_uring: use TWA_SIGNAL for task_work related to eventfd On Fri, 7 Aug 2020 at 09:31, Pavel Begunkov <asml.silence@xxxxxxxxx> wrote: > > Hi, > > I'd love to help but don't have time at the moment. I'll take a look but > in a week, either send it to io-uring@xxxxxxxxxxxxxxx. Jens deals with > such stuff lightning fast! > > > io_uring application should be a single thread in my application which > > means a different thread wakes up io_uring_enter via eventfd. The issue is > > that io_uring_enter(fd, 0, min_complete, IORING_ENTER_GETEVENTS, 0) which > > is blocking doesn't get any poling event from eventfd_write when both > > functions are executed in different threads > > Yeah, sounds strange. Did you try to do the same but without io_uring? > e.g. with write(2), select(2). > > > > > > > here small example > > > > https://gist.github.com/1Jo1/6496d1b8b6b363c301271340e2eab95b > > > > > > io_uring_enter will get a polling event if you move eventfd_write(efd, > > (eventfd_t) 1L) to the main thread, > > > > I don't get it..probably I missed something, why can't I run both functions > > on different threads, any ideas what the cause might be? > > > > > > (Linux Kernel 5.7.10-201) liburing 0.6 & 0.7 > > > > --- > > Josef > > > > -- > Pavel Begunkov
