Ask HN: Why isnt there a syscall to read/write to multiple file desc. on linux?

I am currently playing around with linux epoll interface in order to better understand boost.io and libuv. Upon epoll returns, It looks like the ready file descriptors have to be processed in sequence with one system call per ready file descriptors. Is there a better pattern to process multiple ready file descriptors?

PS : Linux has a vectored/io interface but it does not seems to support multiple fds.