On 31/01/17 21:00, Jinesh Choksi wrote: > On 30 January 2017 at 22:17, Adi Pircalabu wrote: > > May I chip in here? In our environment we're randomly seeing: > > Jan 17 23:40:14 xen01 kernel: ixgbe 0000:04:00.1 eth6: Detected Tx > Unit Hang > > > Someone in this thread: https://sourceforge.net/p/e1000/bugs/530/#2855 > reported that /"With these kernels I was only able to work around the > issue by disabling tx-checksumming offload with ethtool."/ > > However, that was reported for Kernels 4.2.6 / 4.2.8 / 4.4.8 and 4.4.10. > I just thought it could be something you could rule out and hence > mentioned it: > > ethtool --offload eth6 rx off tx off > > > Another thing to rule out in case its a regression with Intel NICs and TSO: > > # tso => tcp-segmentation-offload > # gso => generic-segmentation-offload > # gro => generic-receive-offload > # sg => scatter-gather > # ufo => udp-fragmentation-offload (Cannot change) > # lro => large-receive-offload (Cannot change) > > ethtool -K eth6 tso off gso off gro off sg off Nice, useful information. I've just disabled tx & rx checksumming on all the 10Gb interfaces on the affected servers, see how it goes. But as I said yesterday, in our environment it takes months to replicate. Thanks, Adi Pircalabu