netdev - Re: netem and hierarchical ingress traffic shaping

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Message-ID: <CAA93jw60L+mxEPnxBeruSsZUZKPBy=N3oWTvQQbsJFk9pwvhAw@mail.gmail.com>
Date:	Fri, 23 Dec 2011 19:54:08 +0100
From:	Dave Taht <dave.taht@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Stephen Hemminger <shemminger@...tta.com>,
	"John A. Sullivan III" <jsullivan@...nsourcedevel.com>,
	netdev@...r.kernel.org
Subject: Re: netem and hierarchical ingress traffic shaping

On Fri, Dec 23, 2011 at 7:28 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> Le vendredi 23 décembre 2011 à 18:54 +0100, Dave Taht a écrit :
>
>> Are there any place where all 48 bytes of cb are used?
>>
>
> Yes, but on in qdisc layer.
>
> struct tcp_skb_cb is known to be 44 bytes (when IPv6 is enabled)
>
> In qdisc layer, we use a small part of it, for the moment.
>
>> I wouldn't mind if 'time_to_send' became a separate skb field
>> for a more generic 'time_in_queue'...
>>
>
> This wont happen.
>
> As I posted in an earlier patch, this can be added in "struct
> qdisc_skb_cb"

Ah... this patch?

http://patchwork.ozlabs.org/patch/125329/

I liked what I saw then, but nobody chirped up to review it...

I guess I know what I'm doing this weekend.

>
>
>



-- 
Dave Täht
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