From: Tanaka Akira <akr@...>
Date: 2011-08-02T14:19:26+09:00
Subject: [ruby-core:38692] Re: [Ruby 1.9 - Bug #5138][Open] Add nonblocking IO that does not use exceptions for EOF and EWOULDBLOCK

2011/8/2 Eric Wong <normalperson@yhbt.net>:

> That use of select + readpartial is unsafe.  Spurious wakeup is a
> documented behavior of the select() system call, data can be received
> but checksums can be incorrect and data is discarded (after process is
> woken up from select()).

If you mean about Linux, it is already fixed (or have workaround) 6 years ago.
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/151776

I don't know other example of spurious wakeup.
-- 
Tanaka Akira