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kdump: Can we use LIS drivers in crash kernel?

    Question

  • Hello,

    I am facing issues with kdump on Hyper-V.

    http://www.aidanfinn.com/?p=14985. As per this article we cannot use LIS drivers in crash kernel since Hyper-V cannot host two simultaneous connections from the same synthetic driver.

    I would like to know these:

    1. Does above limitation hold true even for Windows Server 2016? That article was written in 2013.

    2. If I remove LIS drivers from crash kernel, what would be the negative effects of using standard IDE/SCSI drivers?

    Thanks in advance!!

    Tuesday, February 20, 2018 3:07 PM

All replies

  • Hello,

    That option is not required for recent LIS 4.x and current distros.

    The settings from the linked Microsoft KB article is required for old RedHat versions and older hosts (WS2012/WS2008R2).

    For curiosity, what distro/kernel and Hyper-V version are you using?

    Thursday, February 22, 2018 8:39 PM
  • Thanks for your response Chris.

    I am using a custom Linux based OS. Not a standard distro. Kernel is 3.18. Hyper-V version is 8.0.

    There is this article as well: https://support.microsoft.com/en-in/help/2858695/can-t-use-kdump-or-kexec-for-linux-virtual-machines-on-hyper-v . But in this article 2016 has not been listed in "Applies to". So I guess like you said this limitation is not there in server 2016.

    I am using the drivers that come along with standard kernel. So not sure what the LIS version is. How do I know this?


    • Edited by KAP.S Tuesday, February 27, 2018 2:11 PM
    Tuesday, February 27, 2018 1:08 PM