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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <570E56F9.7030200@cogentembedded.com>
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