netdev - Re: [PATCH net-next 01/10] net_sched: add the ability to defer skb freeing

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Date:	Wed, 15 Jun 2016 05:39:07 -0700
From:	Eric Dumazet <edumazet@...gle.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
Cc:	"David S . Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH net-next 01/10] net_sched: add the ability to defer skb freeing

On Wed, Jun 15, 2016 at 5:33 AM, Jesper Dangaard Brouer
<brouer@...hat.com> wrote:
> On Mon, 13 Jun 2016 20:21:50 -0700
>
>
> This looks a lot like kfree_skb_list()....
>
> What about bulk free'ing SKBs here?

We are in a very slow path here. Once in a while a potentially huge
qdisc is dismantled.

The important point is to free these skbs outside of any mutex/lock/bh
, not gain 5% on the actual freeing ;)

Now if you have a use case where these operations happen often enough,
then I believe you have a problem you need to fix !