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