Date: Sun, 22 Aug 2010 01:40:59 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r211597 - head/share/man/man4 Message-ID: <201008220140.o7M1exCJ086419@svn.freebsd.org>
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Author: yongari Date: Sun Aug 22 01:40:59 2010 New Revision: 211597 URL: http://svn.freebsd.org/changeset/base/211597 Log: Document newly introduced tunable dev.bge.%d.forced_udpcsum. While I'm here also mention tunable dev.bge.%d.forced_collapse. Modified: head/share/man/man4/bge.4 Modified: head/share/man/man4/bge.4 ============================================================================== --- head/share/man/man4/bge.4 Sun Aug 22 01:39:09 2010 (r211596) +++ head/share/man/man4/bge.4 Sun Aug 22 01:40:59 2010 (r211597) @@ -31,7 +31,7 @@ .\" .\" $FreeBSD$ .\" -.Dd October 7, 2009 +.Dd August 21, 2010 .Dt BGE 4 .Os .Sh NAME @@ -219,6 +219,26 @@ Allow the ASF feature for cooperating wi Can cause system lockup problems on a small number of systems. Enabled by default. .El +.Sh SYSCTL VARIABLES +The following variables are available as both +.Xr sysctl 8 +variables and +.Xr loader 8 +tunables: +.Bl -tag -width indent +.It Va dev.bge.%d.forced_collapse +Allow collapsing multiple transmit buffers into a single buffer +to increase transmit performance with the cost of CPU cycles. +The default value is 0 to disable transmit buffer collapsing. +.It Va dev.bge.%d.forced_udpcsum +Enable UDP transmit checksum offloading even if controller can generate +UDP datagrams with checksum value 0. +UDP datagrams with checksum value 0 can confuse receiver host as it means +sender did not compute UDP checksum. +The default value is 0 which disables UDP transmit checksum offloading. +The interface need to be brought down and up again before a change takes +effect. +.El .Sh DIAGNOSTICS .Bl -diag .It "bge%d: couldn't map memory"
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