Re: [BUG] Continuously increasing spurious interrupts inside pSeries guest on PowerNV host

[Madhavan Srinivasan <maddy@linux.ibm.com>]

On 8/14/26 8:26 PM, Timothy Pearson wrote:
> With kernel 6.12 (Debian stable) we see a continuously increasing spurious interrupt count inside a pSeries guest running on a PowerNV host:
>
> cat /proc/interrupts
>             CPU0
>   16:          0  XIVE-IPI   0 Edge      IPI-0
>   17:          0  XIVE-IRQ 4096 Edge      RAS_EPOW
>   21:          2  XIVE-IRQ 4353 Edge      hvc_console
>   23:          0  XIVE-IRQ 4097 Edge      RAS_HOTPLUG
>   24:          0  pSeries-PCI-MSI   0 Edge      virtio0-config
>   25:      50995  pSeries-PCI-MSI   1 Edge      virtio0-input.0
>   26:      45569  pSeries-PCI-MSI   2 Edge      virtio0-output.0
>   27:          0  pSeries-PCI-MSI 16384 Edge      virtio1-config
>   28:          6  pSeries-PCI-MSI 16385 Edge      virtio1-input
> LOC:       5781   Local timer interrupts for timer event device
> BCT:          0   Broadcast timer interrupts for timer event device
> LOC:          2   Local timer interrupts for others
> SPU:     449927   Spurious interrupts
> PMI:          0   Performance monitoring interrupts
> MCE:          0   Machine check exceptions
> NMI:          0   System Reset interrupts
> WDG:          0   Watchdog soft-NMI interrupts
> DBL:          0   Doorbell interrupts
>
> The spurious interrupts are apparently from the virtio0-[input|output] devices.

Thanks for the report Timothy, we will have a look at it.

Maddy