svn commit: r294535 - in head/sys/netinet: . cc tcp_stacks

George Neville-Neil gnn at neville-neil.com
Fri Jan 22 15:21:44 UTC 2016



On 22 Jan 2016, at 2:13, Lawrence Stewart wrote:

> Hi Gleb,
>
> On 01/22/16 09:34, Gleb Smirnoff wrote:
>> Author: glebius
>> Date: Thu Jan 21 22:34:51 2016
>> New Revision: 294535
>> URL: https://svnweb.freebsd.org/changeset/base/294535
>>
>> Log:
>> - Rename cc.h to more meaningful tcp_cc.h.
>
> As a bit of historical context, the naming was intentionally protocol
> agnostic because it was originally hoped that the CC framework could 
> be
> shared between multiple CC aware transports, and the design went to 
> some
> lengths to accommodate that possibility (e.g. the ccv_container union 
> in
> struct cc_var). SCTP was the obvious potential in tree consumer at the
> time, and other protocols like DCCP were considered as well.
>
> This hasn't come about to date, but I'm not sure what value is 
> obtained
> from your rename change unless we decide to completely give up on 
> shared
> CC and if we do that, this change doesn't go far enough and we can
> further simplify the framework to make it entirely TCP specific e.g. 
> we
> should probably do away with struct cc_var.
>
> I'd argue in favour of reverting the rename and if you're gung ho 
> about
> making the framework TCP specific, we can start a public discussion
> about what that should look like.
>

I actually was wondering about this as well.  I think it ought to be 
reverted to agnostic.

Best,
George


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