From: Laura Abbott <labb...@redhat.com>
Date: Tue, 23 Aug 2016 10:53:26 -0700
> Fedora received a report[1] of a unit test failing on Ruby when using
> the
> 4.7 kernel. This was a test to send a zero sized UDP packet. With the
> 4.7 kernel, the test now timing out on a select instead of completing.
> The reduced ruby test is
>
> def test_udp_recvfrom_nonblock
> u1 = UDPSocket.new
> u2 = UDPSocket.new
> u1.bind("127.0.0.1", 0)
> u2.send("", 0, u1.getsockname)
> IO.select [u1] # test gets stuck here
> ensure
> u1.close if u1
> u2.close if u2
> end
Well, if there is no data, should select really wake up?
I think it's valid not to.
