From owner-freebsd-net@FreeBSD.ORG  Mon Oct 25 18:33:30 2010
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Date: Mon, 25 Oct 2010 18:33:28 GMT
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To: freebsd@spam.t71.org, yongari@FreeBSD.org, freebsd-net@FreeBSD.org,
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From: yongari@FreeBSD.org
Cc: 
Subject: Re: kern/147985: [alc] alc network driver + tso ( + vlan ? ) does
	not work.
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Synopsis: [alc] alc network driver + tso ( + vlan ? ) does not work.

State-Changed-From-To: open->feedback
State-Changed-By: yongari
State-Changed-When: Mon Oct 25 18:32:39 UTC 2010
State-Changed-Why: 
I can't reproduce this on my box with/without VLAN. I believe this
is the first report that TSO issue on alc(4) and I have no idea how
this can happen. The only vague guess I have at this moment is
upper stack's TSO issue. r212803 fixed a TSO issue but it was not
MFCed yet due to possible side-effects.
http://svn.freebsd.org/viewvc/base/head/sys/netinet/tcp_output.c?r1=212765&r2=212803&view=patch

Another thing to try is using alc(4) in stable/8.
http://svn.freebsd.org/viewvc/base/stable/8/sys/dev/alc/if_alc.c
http://svn.freebsd.org/viewvc/base/stable/8/sys/dev/alc/if_alcreg.h
http://svn.freebsd.org/viewvc/base/stable/8/sys/dev/alc/if_alcvar.h
I'm not sure whether it correctly builds on 8.1-RELEASE but mostly
it would work.


Responsible-Changed-From-To: freebsd-net->yongari
Responsible-Changed-By: yongari
Responsible-Changed-When: Mon Oct 25 18:32:39 UTC 2010
Responsible-Changed-Why: 
Grab.

http://www.freebsd.org/cgi/query-pr.cgi?pr=147985