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    Ubuntu Live iso Hangs on XCP-ng 8.1.0; Guest Reports: 'watchdog: BUG: soft lockup' #371

    Scheduled Pinned Locked Moved Compute
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    • stormiS Offline
      stormi Vates 🪐 XCP-ng Team
      last edited by

      The "CPU stuck for 22s" message reminds me of another user how had a similar message, not in a VM but in dom0 logs themselves. This was workarounded by disabling C-STATES.

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      • N Offline
        nbaudet
        last edited by

        Hi stormi and thank you for the information.
        I'll check the C-STATES status and will disable it if enable next time I will be on site (home working for now).
        I'll let you know the output, especially if the problem stops occurring after a few weeks.
        Any other suggestion is of course welcome.

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        • N Offline
          nbaudet
          last edited by

          So on our servers, the C-STATES was already disabled.
          We are following another lead: to upgrade the linux Kernel to 5.4 (see https://bugzilla.kernel.org/show_bug.cgi?id=204071).
          We won't be able to test before sometimes but I'll let you know. If this is the problem then this is not related with XCP-ng.
          Sorry for the late feedback.

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          • N Offline
            nbaudet
            last edited by

            The final note on our problem:

            • It was not linked to the Linux kernel nor XCP-ng
            • The VM image we were using was built from an Azure VM and contained some Hyper-V libraries. They were the cause of the instability.

            Thus again, not a XCP-ng problem. Sorry for the inconvenience and thank you for your support.

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            • olivierlambertO Offline
              olivierlambert Vates 🪐 Co-Founder CEO
              last edited by

              @nbaudet thanks a lot for your feedback!

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