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

[Kathleen Nichols <nichols@pollere.com>]

I think there are two different kinds of "ECN work" going on: one to
work on the algorithm and the other to see how widely deployed
it is.

On 5/8/12 3:25 AM, Jim Gettys wrote:
> On 05/08/2012 01:10 AM, Eric Dumazet wrote:
>> 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.
> Steve Bauer works for Dave Clark at MIT.  He's been studying ECN
> deployment in the global internet the last couple years, by probing of
> order 1,000,000 sites (and the network paths to them).
>                     - Jim
> 
>>
>> 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 ;)
>>
>>
>>
> 
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