EPOLLET           265 event/modules/ngx_epoll_module.c         ee.events = EPOLLIN|EPOLLET;
EPOLLET           456 event/modules/ngx_epoll_module.c     ee.events = EPOLLIN|EPOLLOUT|EPOLLET;
EPOLLET           408 event/ngx_event.h #define NGX_CLEAR_EVENT    EPOLLET