rb_fd_max        10143 io.c                   ret = maygvl_select(has_gvl, rb_fd_max(&stp->fds), &stp->fds, NULL, NULL, NULL);
rb_fd_max        10166 io.c                   ret = rb_fd_select(rb_fd_max(&stp->fds), NULL, &stp->fds, NULL, NULL);
rb_fd_max        3447 thread.c           size_t size = howmany(rb_fd_max(src), NFDBITS) * sizeof(fd_mask);
rb_fd_max        3522 thread.c           size_t size = howmany(rb_fd_max(src), NFDBITS) * sizeof(fd_mask);