sigev_notify      206 event/modules/ngx_eventport_module.c         sev.sigev_notify = SIGEV_PORT;
sigev_notify       42 os/unix/ngx_aio_read.c         rev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
sigev_notify       39 os/unix/ngx_aio_write.c         wev->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;
sigev_notify      100 os/unix/ngx_file_aio_read.c     aio->aiocb.aio_sigevent.sigev_notify = SIGEV_KEVENT;