From: Eric Dumazet <eric.duma...@gmail.com> Date: Tue, 19 Sep 2017 05:14:24 -0700
> From: Eric Dumazet <eduma...@google.com> > > skb->rbnode shares space with skb->next, skb->prev and skb->tstamp > > Current uses (TCP receive ofo queue and netem) need to save/restore > tstamp, while skb->dev is either NULL (TCP) or a constant for a given > queue (netem). > > Since we plan using an RB tree for TCP retransmit queue to speedup SACK > processing with large BDP, this patch exchanges skb->dev and > skb->tstamp. > > This saves some overhead in both TCP and netem. > > v2: removes the swtstamp field from struct tcp_skb_cb > > Signed-off-by: Eric Dumazet <eduma...@google.com> Looks great, applied, thanks Eric.
