aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
authorJeff Kirsher <jeffrey.t.kirsher@intel.com>2010-12-10 02:47:39 -0500
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2010-12-11 01:12:14 -0500
commit1ffd7246445038569f4c2f4b39bda1e71e68f1a2 (patch)
treedf0ee20d12dd47ab1aa1548cb88eab75cb1211f3 /Documentation
parent072ed34fa97374b390a2493fa281ec8a7888b312 (diff)
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/networking/igb.txt31
1 files changed, 4 insertions, 27 deletions
diff --git a/Documentation/networking/igb.txt b/Documentation/networking/igb.txt
index ab2d71831892..4a5e29c19bd1 100644
--- a/Documentation/networking/igb.txt
+++ b/Documentation/networking/igb.txt
@@ -36,6 +36,7 @@ Default Value: 0
36This parameter adds support for SR-IOV. It causes the driver to spawn up to 36This parameter adds support for SR-IOV. It causes the driver to spawn up to
37max_vfs worth of virtual function. 37max_vfs worth of virtual function.
38 38
39
39Additional Configurations 40Additional Configurations
40========================= 41=========================
41 42
@@ -60,9 +61,10 @@ Additional Configurations
60 Ethtool 61 Ethtool
61 ------- 62 -------
62 The driver utilizes the ethtool interface for driver configuration and 63 The driver utilizes the ethtool interface for driver configuration and
63 diagnostics, as well as displaying statistical information. 64 diagnostics, as well as displaying statistical information. The latest
65 version of Ethtool can be found at:
64 66
65 http://sourceforge.net/projects/gkernel. 67 http://ftp.kernel.org/pub/software/network/ethtool/
66 68
67 Enabling Wake on LAN* (WoL) 69 Enabling Wake on LAN* (WoL)
68 --------------------------- 70 ---------------------------
@@ -91,31 +93,6 @@ Additional Configurations
91 REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not 93 REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not
92 found, the system will fallback to MSI or to Legacy interrupts. 94 found, the system will fallback to MSI or to Legacy interrupts.
93 95
94 LRO
95 ---
96 Large Receive Offload (LRO) is a technique for increasing inbound throughput
97 of high-bandwidth network connections by reducing CPU overhead. It works by
98 aggregating multiple incoming packets from a single stream into a larger
99 buffer before they are passed higher up the networking stack, thus reducing
100 the number of packets that have to be processed. LRO combines multiple
101 Ethernet frames into a single receive in the stack, thereby potentially
102 decreasing CPU utilization for receives.
103
104 NOTE: You need to have inet_lro enabled via either the CONFIG_INET_LRO or
105 CONFIG_INET_LRO_MODULE kernel config option. Additionally, if
106 CONFIG_INET_LRO_MODULE is used, the inet_lro module needs to be loaded
107 before the igb driver.
108
109 You can verify that the driver is using LRO by looking at these counters in
110 Ethtool:
111
112 lro_aggregated - count of total packets that were combined
113 lro_flushed - counts the number of packets flushed out of LRO
114 lro_no_desc - counts the number of times an LRO descriptor was not available
115 for the LRO packet
116
117 NOTE: IPv6 and UDP are not supported by LRO.
118
119Support 96Support
120======= 97=======
121 98