On Thu, 2012-06-28 at 19:47 -0400, Dave Taht wrote: > On Thu, Jun 28, 2012 at 6:56 PM, Yuchung Cheng <[email protected]> wrote: > > On Thu, Jun 28, 2012 at 11:12 AM, Eric Dumazet <[email protected]> > > wrote: > >> On Thu, 2012-06-28 at 10:51 -0700, Dave Taht wrote: > >> > >>> clever idea. A problem is there are other forms of network traffic on > >>> a link, and this is punishing a single tcp > > Dave: it won't just punish a single TCP, all protocols that react to > > XMIT_CN will share similar fate. > > What protocols in the kernel do and don't? was the crux of this question. >
AFAIK that only tcp cares a bit, or seems to. But not that much, since it continues to send packets. Thats because tcp_transmit_skb() changes the NET_XMIT_CN status to plain NET_XMIT_SUCCESS. My long term plan is to reduce number of skbs queued in Qdisc for TCP stack, to reduce RTT (removing the artificial RTT bias because of local queues) > I'm not objecting to the idea, it's clever, as I said. I'm thinking I'll > apply it to cerowrt's next build and see what happens, if this > will apply against 3.3. Or maybe the ns3 model. Or both. A router will have no use of this feature, not sure you need to spend time trying this ;) _______________________________________________ Codel mailing list [email protected] https://lists.bufferbloat.net/listinfo/codel
