Date: Wed, 24 Jan 2007 11:37:18 +0100 From: Rene Ladan <r.c.ladan@gmail.com> To: Bill Paul <wpaul@FreeBSD.ORG> Cc: pyunyh@gmail.com, freebsd-current@freebsd.org Subject: Re: Call for re(4) checksum offload testers. Message-ID: <45B736DE.1000100@gmail.com> In-Reply-To: <20070124071403.CE9E916A401@hub.freebsd.org> References: <20070124071403.CE9E916A401@hub.freebsd.org>
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This is a multi-part message in MIME format. --------------040206020202080206020709 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Bill Paul schreef: [...] > I'm very confused as to why the chip botches the TX checksumming in > this case. Unfortunately, most of this confusion stems from the fact > that you didn't specify exactly which chip rev the user with this > problem has, or give a test case to trip the bug. > I am that user, using this card, found in Asus A6JE laptops. From pciconf: card: class=0x020000 card=0x11f51043 chip=0x816810ec rev=0x01 hdr=0x00 vendor=Realtek Semiconductor device=RTL8168/8111 PCI-E Gigabit Ethernet NIC > I'm assuming this yet another problem with small IP fragments being > mangled. That being the case, it should be possible to trip the bug > with "ping -s 1473 <somehost>." (1473 is 1 byte too large to fit into > a 1500 byte frame, which will cause a 1 byte fragment to be sent.) > I thought I tested this with my sample PCIe cards though, and didn't > see a problem. I'll have to try it again tomorrow. > ping -s 1473 <NAT box> succeeds both with and without the patch (i.e. ping gives timings), I've included two tcpdumps for further analysis. The bug is visible when logging in to sites such as gmail.com or nl.bol.com (a Dutch shopping site), or when connecting Thunderbird to pop.gmail.com (which uses POP3 with SSL) > > -Bill > > -- Regards, Rene -- GPG fingerprint = E738 5471 D185 7013 0EE0 4FC8 3C1D 6F83 12E1 84F6 (subkeys.pgp.net) "It won't fit on the line." -- me, 2001 --------------040206020202080206020709 Content-Type: application/octet-stream; name="re0.orig" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="re0.orig" 1MOyoQIABAAAAAAAAAAAAGAAAAABAAAAkTS3Rfr1CAAqAAAAKgAAAP///////wAY87eJNAgG AAEIAAYEAAEAGPO3iTTAqHvKAAAAAAAAwKh7/pE0t0Xz9wgAPAAAADwAAAAAGPO3iTQAUBhH 5DwIBgABCAAGBAACAFAYR+Q8wKh7/gAY87eJNMCoe8oAAAAAAAAAAAAAAAAAAAAAAACRNLdF BfgIADwAAAA8AAAAAFAYR+Q8ABjzt4k0CABFAAAVPtsAuUABAADAqHvKwKh7/sAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAkjS3RaH4CABgAAAA6gUAAABQGEfkPAAY87eJNAgARQAF3D7c IABAAQAAwKh7ysCoe/4IAJn6sd0AAUW3NJIACPiBCAkKCwwNDg8QERITFBUWFxgZGhscHR4f ICEiIyQlJicoKSorLC0uLzAxMjM0NZI0t0Wv+AgAPAAAADwAAAAAUBhH5DwAGPO3iTQIAEUA ABU+3AC5QAEAAMCoe8rAqHv+wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACSNLdFAP8IAGAA AADqBQAAABjzt4k0AFAYR+Q8CABFAAXc/A8gAEAB3/fAqHv+wKh7ygAAofqx3QABRbc0kgAI +IEICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1kzS3RWz8 CABgAAAA6gUAAABQGEfkPAAY87eJNAgARQAF3D7dIABAAQAAwKh7ysCoe/4IAJYjsd0AAkW3 NJMACPxWCAkKCwwNDg8QERITFBUWFxgZGhscHR4fICEiIyQlJicoKSorLC0uLzAxMjM0NZM0 t0V4/AgAPAAAADwAAAAAUBhH5DwAGPO3iTQIAEUAABU+3QC5QAEAAMCoe8rAqHv+wAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAACTNLdFuQIJAGAAAADqBQAAABjzt4k0AFAYR+Q8CABFAAXc /Q8gAEAB3vfAqHv+wKh7ygAAniOx3QACRbc0kwAI/FYICQoLDA0ODxAREhMUFRYXGBkaGxwd Hh8gISIjJCUmJygpKissLS4vMDEyMzQ1kzS3RcMCCQA8AAAAPAAAAAAY87eJNABQGEfkPAgA RQAAFf0PALlAAQQGwKh7/sCoe8rAAKH6sd0AAUW3NJIACPiBCAkKCwwNDg8QEZQ0t0VMAAkA YAAAAOoFAAAAUBhH5DwAGPO3iTQIAEUABdw+3iAAQAEAAMCoe8rAqHv+CACSSrHdAANFtzSU AAkALQgJCgsMDQ4PEBESExQVFhcYGRobHB0eHyAhIiMkJSYnKCkqKywtLi8wMTIzNDWUNLdF WQAJADwAAAA8AAAAAFAYR+Q8ABjzt4k0CABFAAAVPt4AuUABAADAqHvKwKh7/sAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAlDS3RZYGCQBgAAAA6gUAAAAY87eJNABQGEfkPAgARQAF3P4P IABAAd33wKh7/sCoe8oAAJpKsd0AA0W3NJQACQAtCAkKCwwNDg8QERITFBUWFxgZGhscHR4f ICEiIyQlJicoKSorLC0uLzAxMjM0NZQ0t0WiBgkAPAAAADwAAAAAGPO3iTQAUBhH5DwIAEUA ABX+DwC5QAEDBsCoe/7AqHvKwACeI7HdAAJFtzSTAAj8VggJCgsMDQ4PEBGVNLdFIgQJAGAA AADqBQAAAFAYR+Q8ABjzt4k0CABFAAXcPt8gAEABAADAqHvKwKh7/ggAjnKx3QAERbc0lQAJ BAMICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1lTS3RTAE CQA8AAAAPAAAAABQGEfkPAAY87eJNAgARQAAFT7fALlAAQAAwKh7ysCoe/7AAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAJU0t0VuCgkAYAAAAOoFAAAAGPO3iTQAUBhH5DwIAEUABdz/DyAA QAHc98Coe/7AqHvKAACWcrHdAARFtzSVAAkEAwgJCgsMDQ4PEBESExQVFhcYGRobHB0eHyAh IiMkJSYnKCkqKywtLi8wMTIzNDWVNLdFegoJADwAAAA8AAAAABjzt4k0AFAYR+Q8CABFAAAV /w8AuUABAgbAqHv+wKh7ysAAmkqx3QADRbc0lAAJAC0ICQoLDA0ODxARljS3RfkHCQBgAAAA 6gUAAABQGEfkPAAY87eJNAgARQAF3D7gIABAAQAAwKh7ysCoe/4IAIqZsd0ABUW3NJYACQfa CAkKCwwNDg8QERITFBUWFxgZGhscHR4fICEiIyQlJicoKSorLC0uLzAxMjM0NZY0t0UHCAkA PAAAADwAAAAAUBhH5DwAGPO3iTQIAEUAABU+4AC5QAEAAMCoe8rAqHv+wAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAACWNLdFQA4JAGAAAADqBQAAABjzt4k0AFAYR+Q8CABFAAXcABAgAEAB 2/fAqHv+wKh7ygAAkpmx3QAFRbc0lgAJB9oICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIj JCUmJygpKissLS4vMDEyMzQ1ljS3RUwOCQA8AAAAPAAAAAAY87eJNABQGEfkPAgARQAAFQAQ ALlAAQEGwKh7/sCoe8rAAJZysd0ABEW3NJUACQQDCAkKCwwNDg8QEZc0t0XQCwkAYAAAAOoF AAAAUBhH5DwAGPO3iTQIAEUABdw+4SAAQAEAAMCoe8rAqHv+CACGwbHdAAZFtzSXAAkLsAgJ CgsMDQ4PEBESExQVFhcYGRobHB0eHyAhIiMkJSYnKCkqKywtLi8wMTIzNDWXNLdF3QsJADwA AAA8AAAAAFAYR+Q8ABjzt4k0CABFAAAVPuEAuUABAADAqHvKwKh7/sAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAlzS3RRoSCQBgAAAA6gUAAAAY87eJNABQGEfkPAgARQAF3AEQIABAAdr3 wKh7/sCoe8oAAI7Bsd0ABkW3NJcACQuwCAkKCwwNDg8QERITFBUWFxgZGhscHR4fICEiIyQl JicoKSorLC0uLzAxMjM0NZc0t0UnEgkAPAAAADwAAAAAGPO3iTQAUBhH5DwIAEUAABUBEAC5 QAEABsCoe/7AqHvKwACSmbHdAAVFtzSWAAkH2ggJCgsMDQ4PEBE= --------------040206020202080206020709 Content-Type: application/octet-stream; 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