[Cake] [PATCH net-next v12 3/7] sch_cake: Add optional ACK filter

[Eric Dumazet]

On 05/17/2018 04:23 AM, Toke Høiland-Jørgensen wrote:

> 
> We don't do full parsing of SACKs, no; we were trying to keep things
> simple... We do detect the presence of SACK options, though, and the
> presence of SACK options on an ACK will make previous ACKs be considered
> redundant.
> 

But they are not redundant in some cases, particularly when reorders happen in the network.