Finally I managed to understand how Rx checksum offloading works on Yukon II controllers. The patch at the following URL will add Rx checksum offloading support to msk(4) controllers. http://people.freebsd.org/~yongari/msk/msk.csum.patch The patch was generated against HEAD. Controllers(Yukon Extreme and Yukon FE+) which use more matured Rx checksum offloading does not need this patch. msk(4) already supported Rx checksum offloading for these controllers. This patch is for old Yukon controllers(Yukon EC, Yukon EC Ultra, Yukon FE and Yukon Ultra2). Due to known issues, Rx checksum offloading for Yukon XL was still disabled. I did not see much differences with/without Rx checksum offloading on my box but I guess it may show some differences on notebook systems. The patch also includes some diagnostic message like "Rx checksum value mismatch!" to detect possible hardware checksum logic failure so if you see this message please let me know. Thanks.Received on Sat Mar 06 2010 - 21:53:14 UTC
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