> On 22 Apr, 2020, at 1:50 am, Dave Taht <[email protected]> wrote:
> 
> Jon, how's SCE looking? ready for a backport yet?

We can't do any sort of wide deployment of SCE until it's been approved as an 
Internet experiment by the IETF.  Interested individuals can already compile 
the SCE-enabled kernel and jump through the hoops to try things out - 
carefully.  There's a bit of infrastructure code to go with the new TCP 
algorithms and qdiscs, so I'm not certain how easy a backport would be; better 
to just build the (relatively) current code for now.

IETF TSVWG interim meeting next week (the second of two replacing planned 
in-person sessions at Vancouver) will discuss the big ECT(1) issue, which is 
hotly disputed between SCE and L4S.  The key question is whether ECT(1) should 
become a classifier input to the network (orthogonal to Diffserv but with some 
of the same basic problems), or an additional congestion signal output from the 
network (indicating a lesser degree of congestion, to which a smaller and more 
nuanced response is desired).  It's anyone's guess how that will turn out, but 
the technical merit is on our side and that really should count for something.

If you're keeping an eye on the TSVWG list, expect a major bombshell to drop 
there in the next few days.

 - Jonathan Morton

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