Re: [Xen-devel] hvc console not working on 4.4.0 guest

[David Vrabel <david.vrabel@xxxxxxxxxx>]

On 21/12/15 22:57, M A Young wrote:
> I am testing Fedora rawhide in a xen pv guest and I get the error
> [    9.809550] genirq: Flags mismatch irq 8. 00000000 (hvc_console) vs. 
> 00000000 (rtc0)
> [    9.809714] hvc_open: request_irq failed with rc -16.
> during the boot and the hvc console doesn't respond when the boot 
> finishes. I have noticed this I think since the update through various 
> linux 4.4.0 kernels up to the current 4.4.0-0.rc5.git3.1.fc24.x86_64 one.
> I do get an hvc console if I use the Fedora 23 kernel 4.2.6-300.fc23.x86_64
> from before the update.
> Is this a known problem? I have attached the boot log up to the above 
> error. 

Fixed by "x86: Xen PV guests don't have the rtc_cmos platform device"
which hasn't yet been applied.

As a workaround try using a 2 VCPU guest.

David

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