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

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Date:	Wed, 13 Apr 2016 17:26:01 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Cc:	"David S. Miller" <davem@...emloft.net>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	"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

Hello.

On 4/13/2016 12:04 PM, 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

    s/relay/relies/?

> 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>
[...]

MBR, Sergei