svn commit: r235347 - head/share/man/man4
Glen Barber
gjb at FreeBSD.org
Sat May 12 18:10:28 UTC 2012
Author: gjb (doc committer)
Date: Sat May 12 18:10:27 2012
New Revision: 235347
URL: http://svn.freebsd.org/changeset/base/235347
Log:
Docuement requirement to alter some sysctls when using igb(4) with
jumbo frames.
PR: 153738
Submitted by: Tom Judge (tom!tomjudge.com)
Discussed with: jfv (in part, a long time ago...)
MFC after: 1 week
Modified:
head/share/man/man4/igb.4
Modified: head/share/man/man4/igb.4
==============================================================================
--- head/share/man/man4/igb.4 Sat May 12 17:42:22 2012 (r235346)
+++ head/share/man/man4/igb.4 Sat May 12 18:10:27 2012 (r235347)
@@ -31,7 +31,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd October 11, 2011
+.Dd May 12, 2012
.Dt IGB 4
.Os
.Sh NAME
@@ -160,6 +160,14 @@ The minimum is 80, and the maximum is 40
.It Va hw.igb.enable_aim
If set to 1, enable Adaptive Interrupt Moderation.
The default is to enable Adaptive Interrupt Moderation.
+.It Va kern.ipc.nmbclusters
+The maximum number of mbuf clusters allowed.
+If the system has more than one igb card or jumbo frames are
+enabled, this value will need to be increased.
+.It Va kern.ipc.nmbjumbo9k
+The maximum number of mbuf 9k jumbo clusters allowed.
+Increasing this to allow for at least 8192 extra clusters
+per interface can allow for an mtu of 8192.
.El
.Sh FILES
.Bl -tag -width /dev/led/igb*
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