[Cake] [lede-project/source] Add support for cake qdisc (#72)

Kevin Darbyshire-Bryant kevin at darbyshire-bryant.me.uk
Wed Jun 1 06:02:03 EDT 2016

To try and keep everyone in the loop this has also been sent to the cake 

LR;DR - There's a pull request to the LEDE tree to integrate cake as a 
patch to tc as well as a small, separate core package for 
kmod-sched-cake.  This is a good thing.  The pull request is 

Hannu Nyman is the author of the patch included in the PR - I've 
volunteered to be maintainer until cake really, really, really goes 
upstream.  Lucky me :-)

Hannu's patch included an improvement in column alignment on tc -s qdisc 
show output.  I have updated Dave's tc-adv tree to include this cosmetic 

Jonathan made reference to "a particular misfeature that should be 
deleted".  This mis-feature is DSCP washing.  This has been brought up 
before and to that end I put in some pull requests removing said 
facility to Dave's cake & tc-adv repos.  On that previous occasion it 
was decided it could stay but again it has been mentioned as being 
something undesirable.  I dug around, found my previous 'nosquashwash' 
trees, rebased them and have submitted pull requests again.


Maybe it will save a little work.  Or if JM happy I will commit them as 
is.  I personally would like this stumbling block removed for better or 
for worse, let's not stumble over it again :-)


On 31/05/16 19:46, Hannu Nyman wrote:
> I have amended the commit (and it is rebased to the current LEDE head)
>   * import the cake commit recommended by @chromi
>     <https://github.com/chromi>
>   * define Kevin as the maintainer for cake, thanks @kdarbyshirebryant
>     <https://github.com/kdarbyshirebryant>
> @kdarbyshirebryant <https://github.com/kdarbyshirebryant> , regarding
> maintenance:
>   * The cake part is easily maintainable, as the Makefile here just
>     defines the commit to be fetched from the original cake repo and
>     sets date as the version.
>   * tc patch may require some manual diff work if the later changes in
>     tc-adv are complex. I actually created my patch a few months ago by
>     making a diff of your tc-adv4.3 branch (that contained tc-adv
>     applied to iproute 4.3) to plain iproute. Then I pruned the
>     non-essential parts (e.g. extra/old cake versions still present in
>     tc-adv, changes to other qdiscs, man pages etc.) from the patch and
>     left only the cake stuff to be compiled. And that was not actually
>     very much. Basically just a new module for tc, small changes to a
>     header file and Makefile. I have since then updated the patch to
>     include the two commits from @chromi <https://github.com/chromi> in
>     April.
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