LRO causing stretch ACK violations interacts badly with delayed ACKing

[Julian Elischer]

On 10/18/13 6:03 AM, Colin Percival wrote:
> Hi all,
>
> I know {TSO, LRO, ACKing policy} has been discussed here recently, and I don't
> want to rehash everything, but I'm seeing some very bad misbehaviour with LRO
> and delayed ACKing turned on.
>
> Running 'fetch -o /dev/null https://www.amazon.com/' on an EC2 instance running
[...]
is this just for -current?
> Out of 142 ms that this TCP connection is alive, 100 ms was wasted.  This seems
> like something which ought to be fixed...
>