<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On 30 January 2017 at 22:17, Adi Pircalabu <span dir="ltr"><<a href="mailto:adi@ddns.com.au" target="_blank">adi@ddns.com.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div id="gmail-:1ai" class="gmail-a3s gmail-aXjCH gmail-m159f174eab380b97">May I chip in here? In our environment we're randomly seeing:<br>
<br>
Jan 17 23:40:14 xen01 kernel: ixgbe 0000:04:00.1 eth6: Detected Tx Unit Hang</div></blockquote></div><br></div><div class="gmail_extra">Someone in this thread: <a href="https://sourceforge.net/p/e1000/bugs/530/#2855">https://sourceforge.net/p/e1000/bugs/530/#2855</a>  reported that <i>"<span style="color:rgb(85,85,85);font-family:sans-serif;font-size:13px">With these kernels I was only able to work around the issue by disabling tx-checksumming offload with ethtool.</span>"</i></div><div class="gmail_extra"><br></div><div class="gmail_extra">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:</div><div class="gmail_extra"><br></div><div class="gmail_extra"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">ethtool </span><font color="#333333" face="monospace"><span style="font-size:12px">--offload </span></font><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">eth6 rx off tx off</span></div><div class="gmail_extra"><br></div><div class="gmail_extra"><br></div><div class="gmail_extra">Another thing to rule out in case its a regression with Intel NICs and TSO:</div><div class="gmail_extra"><br></div><div class="gmail_extra"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px"># tso => tcp-segmentatio</span><wbr style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">n-offload</span><br style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px"># gso => generic-</span><wbr style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">segmentation-</span><wbr style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">offload</span><br style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px"># gro => generic-</span><wbr style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">receive-</span><wbr style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">offload</span><br style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px"># sg => scatter-gather</span><br style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px"># ufo => udp-fragmentati</span><wbr style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">on-offload (Cannot change)</span><br style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px"># lro => large-receive-</span><wbr style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">offload (Cannot change)</span><br></div><div class="gmail_extra"><br></div><div class="gmail_extra"><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px">ethtool -K eth6 tso off gso off gro off sg off</span><span style="color:rgb(51,51,51);font-family:monospace;font-size:12px"><br></span></div><div class="gmail_extra"><br></div></div>