Microsoft Hyper-V SLES12 Virtual Machines encounter "eth0: unable to send receive completion pkt" error messages

This document (7018687) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 12 SP2
SUSE Linux Enterprise Server 12 SP1
SUSE Linux Enterprise Server 12
 

Situation

The following error messages are seen in the message log intermittently:

  2016-11-03T13:39:15.136188-05:00 server1 kernel: [166116.761481] hv_netvsc vmbus_13 eth0: unable to send receive completion pkt (tid 1b65)...retrying 1
  2016-11-03T13:39:15.136399-05:00 server1 kernel: [166116.761587] hv_netvsc vmbus_13 eth0: unable to send receive completion pkt (tid 1b65)...retrying 2
  2016-11-03T13:39:15.136402-05:00 server1 kernel: [166116.761868] hv_netvsc vmbus_13 eth0: unable to send receive completion pkt (tid 1b65)...retrying 3
  2016-11-03T13:39:15.136404-05:00 server1 kernel: [166116.761974] hv_netvsc vmbus_13 eth0: unable to send receive completion pkt (tid 1b65)...retrying 4
  2016-11-03T13:39:15.136405-05:00 server1 kernel: [166116.761977] hv_netvsc vmbus_13 eth0: unable to send receive completion pkt (tid 1b65)...give up retrying

Resolution

This network issue is fixed in SLES12 SP2 kernel version 4.4.49-92.11.1.

Cause

This issue is caused by a bug at the Microsoft Hyper-V VM layer under heavy network load.

Additional Information

SLES12 SP2 kernel version 4.4.49-92.11.1
- hv_netvsc: Implement batching of receive completions.

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7018687
  • Creation Date: 06-Mar-2017
  • Modified Date:04-Mar-2021
    • SUSE Linux Enterprise Server

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