netdev - Re: [PATCH RFC 1/2] tun: don't require serialization lock on tx

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Message-ID: <570F708D.6060401@stressinduktion.org>
Date:	Thu, 14 Apr 2016 12:27:25 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg Kurz <gkurz@...ux.vnet.ibm.com>,
	Jason Wang <jasowang@...hat.com>
Subject: Re: [PATCH RFC 1/2] tun: don't require serialization lock on tx

On 13.04.2016 11:04, Paolo Abeni wrote:
> The current tun_net_xmit() implementation don't need any external
> lock since it relay on rcu protection for the tun data structure
> and on socket queue lock for skb queuing.
>
> This patch set the NETIF_F_LLTX feature bit in the tun device, so
> that on xmit, in absence of qdisc, no serialization lock is acquired
> by the caller.
>
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Acked-by: Hannes Frederic Sowa <hannes@...essinduktion.org>