diff --git a/src/unix/linux-core.c b/src/unix/linux-core.c index 5f621599..7a436304 100644 --- a/src/unix/linux-core.c +++ b/src/unix/linux-core.c @@ -149,6 +149,7 @@ void uv__io_poll(uv_loop_t* loop, int timeout) { int fd; int op; int i; + static int no_epoll_wait; if (loop->nfds == 0) { assert(QUEUE_EMPTY(&loop->watcher_queue)); @@ -195,10 +196,22 @@ void uv__io_poll(uv_loop_t* loop, int timeout) { count = 48; /* Benchmarks suggest this gives the best throughput. */ for (;;) { - nfds = uv__epoll_wait(loop->backend_fd, - events, - ARRAY_SIZE(events), - timeout); + if (!no_epoll_wait) { + nfds = uv__epoll_wait(loop->backend_fd, + events, + ARRAY_SIZE(events), + timeout); + if (nfds == -1 && errno == ENOSYS) { + no_epoll_wait = 1; + continue; + } + } else { + nfds = uv__epoll_pwait(loop->backend_fd, + events, + ARRAY_SIZE(events), + timeout, + NULL); + } /* Update loop->time unconditionally. It's tempting to skip the update when * timeout == 0 (i.e. non-blocking poll) but there is no guarantee that the