[Cake] Update kernel version check in cake

[Sebastian Moeller]

Hi Dave,


On Sep 29, 2015, at 13:10 , Dave Taht <dave.taht at gmail.com> wrote:

> I added support for squashing to both sch_cake and tc-adv repos. Sort
> of compile tested
> only. (my laptop's kernel is 3.16 and doesn't build, my virtuals in
> linode do not come with
> kernel sources, snapon crashed two weeks ago, and so on)
> 

	Just played a bit with the shiny new squash option. For my limited testing it seems to work. I do wonder whether the automatic default to besteffort is the ideal behavior though. For example on egress it would be nice to be able to use the internal set DSCP markings but clean them from the outgoing packets as not to leak “information” to the ISP, similarly but more contrived the same could be agued for ingress ;) 


Best Regards


> but it was nice to write a few lines of code, knowing that someone
> here will fix 'em if
> I broke something.
> 
> 
> On Tue, Sep 29, 2015 at 2:55 AM, Dave Taht <dave.taht at gmail.com> wrote:
>> On Tue, Sep 29, 2015 at 2:42 AM, Kevin Darbyshire-Bryant
>> <kevin at darbyshire-bryant.me.uk> wrote:
>>> 
>>> 
>>> On 29/09/15 00:01, Jonathan Morton wrote:
>>>> 
>>>> I actually had the version check fix locally, but for some reason it
>>>> hadn't been picked up by a push yet.
>>>> 
>>> Yep, I have those moments.  Just when I think I've got git sussed it
>>> goes and does something completely logical but totally unexpected :-)
>>>> 
>>>> Squashing would involve writing to the TOS byte, which is already done
>>>> by ECN marking, via a helper function.
>>>> 
>>> Ah, so if I can work out how that's done I'm 50% of the way there.
>>> Should keep me amused for a few days.
>>>> 
>>>> I tried removing the cow stuff once before.  Everything promptly
>>>> stopped working until I put it back.  I have no idea why.
>>>> 
>>> Well here's interesting.  I got brave and put my suggested change into
>>> action.  So far: 1) router not blown up  2) tc -s still shows traffic in
>>> different Classes (Dave, I prefer your term 'Bin' here too - I
>>> considered 'Bucket' for a laugh) which suggests the reading of ip_hdr is
>>> still working. 3) This hasn't been thoroughly tested in any way
>>> whatsoever but i've tried diffserv4 & besteffort and both don't appear
>>> broken.
>> 
>> I agree with bin. Wouldn't mind it if that made it into the variable
>> name instead of class.
>> 
>>> Pull request: https://github.com/dtaht/sch_cake/pull/6
>> 
>> It would be my hope also that killing the cow would speed it up.
>> 
>> Untested by me, but pulled.
>> 
>> 
>>> Kevin
>>>> 
>>>> - Jonathan Morton
>>>> 
>>> 
>>> 
>> 
>> 
>> 
>> --
>> Dave Täht
>> Do you want faster, better, wifi? https://www.patreon.com/dtaht
> 
> 
> 
> -- 
> Dave Täht
> Do you want faster, better, wifi? https://www.patreon.com/dtaht
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