Hyper-V 2022 - VMSS logs constantly about Hyper-V-VmSwitch

New Contributor

Hi guys,

any hyper-v gurus around? :cool: I have a new 2022 host which will be deployed to production soon. I've found by luck that vmms process (Virtual Machine Management service) constantly logs Verbose messages about "Ioctl Begin ioctlCode: 0xD15" and " Ioctl End ioctlCode: 0xD15, delta (100 ns): 80, ntStatus:  0x80000005(NT=Buffer Overflow)" with Event ID 0 and source Hyper-V-VmSwitch.

vmms01.pngI've looked around and had no luck finding the cause. It's happening even if I stop all the VMs and I even removed the vSwitch - there is no vSwitch on the host and it still logs like hell. The source is well know SID 1-5-18 (SECURITY_LOCAL_SYSTEM_RID)


Anyone saw this before or have any idea what could be the issue here?

Thanks for any ideas



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