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Documentation/networking/igb.txt: update documentation 

Update Intel Wired LAN igb documentation.

v2- Updated the ethtool support link, removed the LRO section and
    anti-spoofing sections.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jeff Kirsher 2010-12-09 23:47:39 -08:00
parent 072ed34fa9
commit 1ffd724644
1 changed files with 4 additions and 27 deletions
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31
Documentation/networking/igb.txt
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@ -36,6 +36,7 @@ Default Value: 0
This parameter adds support for SR-IOV. It causes the driver to spawn up to
max_vfs worth of virtual function.
Additional Configurations
=========================
@ -60,9 +61,10 @@ Additional Configurations
Ethtool
-------
The driver utilizes the ethtool interface for driver configuration and
diagnostics, as well as displaying statistical information.
diagnostics, as well as displaying statistical information. The latest
version of Ethtool can be found at:
http://sourceforge.net/projects/gkernel.
http://ftp.kernel.org/pub/software/network/ethtool/
Enabling Wake on LAN* (WoL)
---------------------------
@ -91,31 +93,6 @@ Additional Configurations
REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not
found, the system will fallback to MSI or to Legacy interrupts.
LRO
---
Large Receive Offload (LRO) is a technique for increasing inbound throughput
of high-bandwidth network connections by reducing CPU overhead. It works by
aggregating multiple incoming packets from a single stream into a larger
buffer before they are passed higher up the networking stack, thus reducing
the number of packets that have to be processed. LRO combines multiple
Ethernet frames into a single receive in the stack, thereby potentially
decreasing CPU utilization for receives.
NOTE: You need to have inet_lro enabled via either the CONFIG_INET_LRO or
CONFIG_INET_LRO_MODULE kernel config option. Additionally, if
CONFIG_INET_LRO_MODULE is used, the inet_lro module needs to be loaded
before the igb driver.
You can verify that the driver is using LRO by looking at these counters in
Ethtool:
lro_aggregated - count of total packets that were combined
lro_flushed - counts the number of packets flushed out of LRO
lro_no_desc - counts the number of times an LRO descriptor was not available
for the LRO packet
NOTE: IPv6 and UDP are not supported by LRO.
Support
=======