On Thu, Sep 10, 2020 at 12:48:34PM +0300, Sergey Nikitin wrote: > Hi! > > epoll does not report an event to all the threads running epoll_wait() on > the same epoll descriptor. > The behavior appeared in recent kernel versions starting with 5.6 probably. > > How to reproduce: > - create a pair of sockets > - create epoll instance > - register the socket on the epoll instance, listen for EPOLLIN events > - start 2 threads running epoll_wait() > - send some data to the socket > - see that epoll_wait() within one of the threads reported an event, unlike > another. Could you reproduce it on mainline kernel and try to bisect it?
