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New: Kernel panic with high network tarffic to KVM guest

Bug 155841 [email protected] 1 participant 2 messages Sep 2, 2016 – Sep 3, 2016 KVM

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https://bugzilla.kernel.org/show_bug.cgi?id=155841

            Bug ID: 155841
           Summary: Kernel panic with high network tarffic to KVM guest
           Product: Virtualization
           Version: unspecified
    Kernel Version: 3.16.7
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 232051
--> https://bugzilla.kernel.org/attachment.cgi?id=232051&action=edit
crashlog-screenshot

Our KVM host crashes randomly when there is high network traffic to the guest. For the host crashlog see the attached screenshot.
We are using this guest as a Freifunk (freifunk.net) gateway. We suspect that this occurs when to many nodes are connecting to the gateway.

At startup of the host error messages like the following are shown:

[   45.769454] kvm: zapping shadow pages for mmio generation wraparound
[   52.593232] kvm [1807]: vcpu0 unhandled rdmsr: 0x606
[   76.593085] kvm [1807]: vcpu0 unhandled rdmsr: 0x611
[   76.593138] kvm [1807]: vcpu0 unhandled rdmsr: 0x639
[   76.593183] kvm [1807]: vcpu0 unhandled rdmsr: 0x641
[   76.593227] kvm [1807]: vcpu0 unhandled rdmsr: 0x619
[   76.607495] kvm [1807]: vcpu0 unhandled rdmsr: 0x611
[   76.607559] kvm [1807]: vcpu0 unhandled rdmsr: 0x639
[   76.607609] kvm [1807]: vcpu0 unhandled rdmsr: 0x641
[   76.607658] kvm [1807]: vcpu0 unhandled rdmsr: 0x619

This happening under high network load is only our suspicion.

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author
#1 lore raw

[Bug 155841] Kernel panic with high network tarffic to KVM guest

https://bugzilla.kernel.org/show_bug.cgi?id=155841

Nudelsalat <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

     Kernel Version|3.16.7                      |3.16.0

--- Comment #1 from Nudelsalat <[email protected]> --- Yesterday we also installed the newest Kernel (4.6.0-0) that is included in the Debian Jessie Backports repo. Until now it is running without any crashes. The unhandled rdmsr stayed but I think this is a qemu or kvm error.

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