Date: Thu, 14 May 2009 12:46:30 +0400 From: Lev Serebryakov <lev@FreeBSD.org> To: Lars Eggert <lars.eggert@nokia.com> Cc: "pyunyh@gmail.com" <pyunyh@gmail.com>, "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>, "d@delphij.net" <d@delphij.net>, "nigel@eyede.com" <nigel@eyede.com> Subject: Re[2]: TCP differences in 7.2 vs 7.1 Message-ID: <1842780877.20090514124631@serebryakov.spb.ru> In-Reply-To: <310A73CC-A32D-4794-BF23-A49715AFCF99@nokia.com> References: <guccc2$8b4$1@ger.gmane.org> <4A09DEF1.2010202@delphij.net> <4A09FDB2.5080307@eyede.com> <20090513004131.GP65350@michelle.cdnetworks.co.kr> <DAF693BD-D7B0-49FA-97EF-41C1EA1FAF84@nokia.com> <20090514082750.GU65350@michelle.cdnetworks.co.kr> <310A73CC-A32D-4794-BF23-A49715AFCF99@nokia.com>
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Hello, Lars.
You wrote 14 мая 2009 г., 12:28:43:
> Reproducing the issue is as easy as setting net.inet.tcp.tso=1.
> What's interesting is that I only see the issue on one of the eight em
> interfaces. That interface is connected to a D-Link DIR-655 WLAN
> router. When I tcpdump on the other interfaces with TSO enabled, I see
> no "IP bad-len 0" messages.
I have same problem (every one of 100-200 frames) on on-board if_em:
em0@pci0:0:25:0: class=0x020000 card=0x82681043 chip=0x10bd8086 rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = '82566DM-2 Gigabit Network Connection'
class = network
subclass = ethernet
--
// Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>
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