From: Paolo Abeni <pabeni@redhat.com>
To: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
"Michael S. Tsirkin" <mst@redhat.com>,
Hannes Frederic Sowa <hannes@stressinduktion.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Greg Kurz <gkurz@linux.vnet.ibm.com>,
Jason Wang <jasowang@redhat.com>
Subject: [PATCH RFC 0/2] tun: lockless xmit
Date: Wed, 13 Apr 2016 11:04:45 +0200 [thread overview]
Message-ID: <cover.1460393493.git.pabeni@redhat.com> (raw)
This patch series try to remove the need for any lock in the tun device
xmit path, significantly improving the forwarding performance when multiple
processes are accessing the tun device (i.e. in a nic->bridge->tun->vm scenario).
The lockless xmit is obtained explicitly setting the NETIF_F_LLTX feature bit
and removing the default qdisc.
Unlikely most virtual devices, the tun driver has featured a default qdisc
for a long period, but it already lost such feature in linux 4.3.
Paolo Abeni (2):
tun: don't require serialization lock on tx
tun: don't set a default qdisc
drivers/net/tun.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--
1.8.3.1
next reply other threads:[~2016-04-13 9:05 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-13 9:04 Paolo Abeni [this message]
2016-04-13 9:04 ` [PATCH RFC 1/2] tun: don't require serialization lock on tx Paolo Abeni
2016-04-13 9:41 ` Michael S. Tsirkin
2016-04-13 9:48 ` Hannes Frederic Sowa
2016-04-13 12:57 ` Michael S. Tsirkin
2016-04-13 13:27 ` Eric Dumazet
2016-04-13 13:54 ` Michael S. Tsirkin
2016-04-13 14:39 ` Eric Dumazet
2016-04-13 12:52 ` Eric Dumazet
2016-04-13 14:26 ` Sergei Shtylyov
2016-04-14 6:50 ` Jason Wang
2016-04-14 10:27 ` Hannes Frederic Sowa
2016-04-13 9:04 ` [PATCH RFC 2/2] tun: don't set a default qdisc Paolo Abeni
2016-04-13 10:26 ` Michael S. Tsirkin
2016-04-13 15:22 ` David Miller
2016-04-14 6:49 ` Jason Wang
2016-04-14 9:05 ` Michael S. Tsirkin
2016-04-14 9:07 ` Jason Wang
2016-04-14 9:10 ` Michael S. Tsirkin
2016-04-14 9:21 ` Jason Wang
2016-04-14 10:01 ` Michael S. Tsirkin
2016-04-14 10:09 ` Hannes Frederic Sowa
2016-04-13 11:08 ` [PATCH RFC 0/2] tun: lockless xmit Michael S. Tsirkin
2016-04-13 12:50 ` Eric Dumazet
2016-04-13 12:56 ` Michael S. Tsirkin
2016-04-13 13:09 ` Eric Dumazet
2016-04-13 13:17 ` Michael S. Tsirkin
2016-04-13 13:43 ` Eric Dumazet
2016-04-13 16:42 ` Eric Dumazet
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