[Codel] [PATCH 1/2] codel: Controlled Delay AQM

[Eric Dumazet]

On Tue, 2012-05-08 at 00:14 -0400, Jim Gettys wrote:

> Too late tonight to try to resurrect what I remember from Steve.
> Barring unforeseen events, he should be able to join the list then and
> better coming from him anyway.
> 

I never heard of Steve, yet we did a lot of ECN related work on linux
kernel to fix various issues (or allowing a safe ECN activation) these
past years.

commit bd14b1b2e29bd6812597f896dde06eaf7c6d2f24
tcp: be more strict before accepting ECN negociation

commit e4ae004b84b315dd4b762e474f97403eac70f76a 
netem: add ECN capability

commit ddecf0f4db44ef94847a62d6ecf74456b4dcc66f
net_sched: sfq: add optional RED on top of SFQ

commit b5c5693bb723a019deac3cd1345f3e7233c8a67e
tcp: report ECN_SEEN in tcp_info

commit 7a269ffad72f3604b8982fa09c387670e0d2ee14
tcp: ECN blackhole should not force quickack mode

commit 5173cc057787560c127c6e9737f308c833dc4ff3
ipv4: more compliant RFC 3168 support 

commit ca06707022d6ba4744198a8ebbe4994786b0c613
ipv6: restore correct ECN handling on TCP xmit

commit 4a2b9c3756077c05dd8666e458a751d2248b61b6
net_sched: fix ip_tos2prio

commit 6623e3b24a5ebb07e81648c478d286a1329ab891
ipv4: IP defragmentation must be ECN aware

commit 172d69e63c7f1e8300d0e1c1bbd8eb0f630faa15
syncookies: add support for ECN



Yes, some middlebox might be broken.

But far more users will be stuck in July when FBI stop DNSChanger
servers for good.

Far more users will have problems at IPv6 launch in June

And so on.

Of course we could try to focus on AQM problems for the time being ;)