Why huge number of Tx errors are reported under & `/proc/net/dev` for nodes with System z environment ?
Issue
- Below output shows the Tx errors;
[user@localhost ] $ less proc_net_dev |column -t
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo: 962048498299 4082916493 0 0 0 0 0 0 962048498299 4082916493 0 0 0 0 0 0
enccw0.0.a800: 463195685305 500229534 0 0 0 0 0 0 504751186392 608755805 0 0 0 0 0 0
enccw0.0.0600: 17586790183980 91706834166 0 12 0 0 0 0 148508533630786 155409646366 0 0 0 0 0 0
enccw0.0.a900: 463126250467 500169721 0 0 0 0 0 0 504725335441 608709355 0 0 0 0 0 0
[user@localhost ] $
- This is causing performance issue with oracle database such that the DB gets hang.
Environment
- Red Hat Enterprise Linux 7
- kernel-3.10.0-693.11.6.el7.s390x
- NIC module: qeth_l2
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