netdev - Re: qdisc_enqueue, NET_XMIT_SUCCESS and kfree

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Message-ID: <20080807143654.16955ngk5tnp5kzk@hayate.ip6>
Date:	Thu, 07 Aug 2008 14:36:54 +0300
From:	"Jussi Kivilinna" <jussi.kivilinna@...et.fi>
To:	"Jarek Poplawski" <jarkao2@...il.com>
Cc:	"David Miller" <davem@...emloft.net>, kaber@...sh.net,
	netdev@...r.kernel.org
Subject: Re: qdisc_enqueue, NET_XMIT_SUCCESS and kfree_skb

Quoting "Jarek Poplawski" <jarkao2@...il.com>:

> There is also some doubt about differences between ->enqueue() and
> ->requeue() wrt. kfree_skb() and returning codes: maybe it would be
> better (for uniformity) to add similar changes to requeues (and
> dev_requeue_skb()) as well?
>

I think requeue should be changed to return same as enqueue, netem even
uses requeue as enqueue replacement for packet reordering. Maybe add
new function qdisc_requeue_tree to handle freeing and masking flags and
change outside uses of requeue to use it (qdisc_peek_len in hfsc,
sch_atm_dequeue, dev_requeue_skb).

  - Jussi

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