linux.git/Documentation/networking, branch v3.12

bonding: Make alb learning packet interval configurable

2013-09-16T02:20:44+00:00

running bonding in ALB mode requires that learning packets be sent periodically,
so that the switch knows where to send responding traffic.  However, depending
on switch configuration, there may not be any need to send traffic at the
default rate of 3 packets per second, which represents little more than wasted
data.  Allow the ALB learning packet interval to be made configurable via sysfs

Signed-off-by: Neil Horman 
Acked-by: Acked-by: Veaceslav Falico 
CC: Jay Vosburgh 
CC: Andy Gospodarek 
CC: "David S. Miller" 
Signed-off-by: Andy Gospodarek 
Signed-off-by: David S. Miller

i40e: include i40e in kernel proper

2013-09-11T09:28:40+00:00

This patch adds the changes for Kconfig, i40e.txt, MAINTAINERS, Kbuild
and new i40e/Makefile to build i40e with the kernel.

New driver build option is CONFIG_I40E

Signed-off-by: Jesse Brandeburg 
Signed-off-by: Shannon Nelson 
CC: PJ Waskiewicz 
CC: e1000-devel@lists.sourceforge.net
Tested-by: Kavindya Deegala 
Signed-off-by: Jeff Kirsher

net: ipv6: mld: document force_mld_version in ip-sysctl.txt

2013-09-04T18:53:21+00:00

Document force_mld_version parameter in ip-sysctl.txt.

Signed-off-by: Daniel Borkmann 
Cc: Hannes Frederic Sowa 
Acked-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

driver:net:stmmac: Disable DMA store and forward mode if platform data force_thresh_dma_mode is set.

2013-08-30T21:26:09+00:00

Some synopsys ip implementation doesn't support DMA store and forward mode,
such as BF60x. So, set force_thresh_dma_mode to use DMA thresholds only.
Update document and devicetree as well.

Signed-off-by: Sonic Zhang 
Acked-by: Giuseppe Cavallaro 
Signed-off-by: David S. Miller

net: packet: document available fanout policies

2013-08-29T20:43:29+00:00

Update documentation to add fanout policies that are available.

Signed-off-by: Daniel Borkmann 
Signed-off-by: David S. Miller

tcp: TSO packets automatic sizing

2013-08-29T19:50:06+00:00

After hearing many people over past years complaining against TSO being
bursty or even buggy, we are proud to present automatic sizing of TSO
packets.

One part of the problem is that tcp_tso_should_defer() uses an heuristic
relying on upcoming ACKS instead of a timer, but more generally, having
big TSO packets makes little sense for low rates, as it tends to create
micro bursts on the network, and general consensus is to reduce the
buffering amount.

This patch introduces a per socket sk_pacing_rate, that approximates
the current sending rate, and allows us to size the TSO packets so
that we try to send one packet every ms.

This field could be set by other transports.

Patch has no impact for high speed flows, where having large TSO packets
makes sense to reach line rate.

For other flows, this helps better packet scheduling and ACK clocking.

This patch increases performance of TCP flows in lossy environments.

A new sysctl (tcp_min_tso_segs) is added, to specify the
minimal size of a TSO packet (default being 2).

A follow-up patch will provide a new packet scheduler (FQ), using
sk_pacing_rate as an input to perform optional per flow pacing.

This explains why we chose to set sk_pacing_rate to twice the current
rate, allowing 'slow start' ramp up.

sk_pacing_rate = 2 * cwnd * mss / srtt

v2: Neal Cardwell reported a suspect deferring of last two segments on
initial write of 10 MSS, I had to change tcp_tso_should_defer() to take
into account tp->xmit_size_goal_segs

Signed-off-by: Eric Dumazet 
Cc: Neal Cardwell 
Cc: Yuchung Cheng 
Cc: Van Jacobson 
Cc: Tom Herbert 
Acked-by: Yuchung Cheng 
Acked-by: Neal Cardwell 
Signed-off-by: David S. Miller

ipv6: drop fragmented ndisc packets by default (RFC 6980)

2013-08-29T19:32:08+00:00

This patch implements RFC6980: Drop fragmented ndisc packets by
default. If a fragmented ndisc packet is received the user is informed
that it is possible to disable the check.

Cc: Fernando Gont 
Cc: YOSHIFUJI Hideaki 
Signed-off-by: Hannes Frederic Sowa 
Signed-off-by: David S. Miller

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch

2013-08-28T02:11:18+00:00

Jesse Gross says:

====================
A number of significant new features and optimizations for net-next/3.12.
Highlights are:
 * "Megaflows", an optimization that allows userspace to specify which
   flow fields were used to compute the results of the flow lookup.
   This allows for a major reduction in flow setups (the major
   performance bottleneck in Open vSwitch) without reducing flexibility.
 * Converting netlink dump operations to use RCU, allowing for
   additional parallelism in userspace.
 * Matching and modifying SCTP protocol fields.
====================

Signed-off-by: David S. Miller

Documentation/networking/: Update Intel wired LAN driver documentation

2013-08-27T20:05:26+00:00

Updates the documentation to the Intel wired LAN drivers.

Signed-off-by: Jeff Kirsher 
Tested-by: Aaron Brown 
Tested-by: Phil Schmitt 
Signed-off-by: David S. Miller

openvswitch: Mega flow implementation

2013-08-23T23:43:07+00:00

Add wildcarded flow support in kernel datapath.

Wildcarded flow can improve OVS flow set up performance by avoid sending
matching new flows to the user space program. The exact performance boost
will largely dependent on wildcarded flow hit rate.

In case all new flows hits wildcard flows, the flow set up rate is
within 5% of that of linux bridge module.

Pravin has made significant contributions to this patch. Including API
clean ups and bug fixes.

Signed-off-by: Pravin B Shelar 
Signed-off-by: Andy Zhou 
Signed-off-by: Jesse Gross