ngx_read_ahead    460 os/unix/ngx_files.c ngx_read_ahead(ngx_fd_t fd, size_t n)
ngx_read_ahead    277 os/unix/ngx_files.h #define ngx_read_ahead(fd, n)    fcntl(fd, F_READAHEAD, (int) n)
ngx_read_ahead    289 os/unix/ngx_files.h #define ngx_read_ahead(fd, n)    0