netdev - Re: netem and hierarchical ingress traffic shaping

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Date:	Fri, 23 Dec 2011 19:28:27 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Dave Taht <dave.taht@...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

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"



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