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Re: [Xen-devel] Xen-devel Digest, Vol 130, Issue 521

On 2015-12-21 23:58, xen-devel-request@xxxxxxxxxxxxx wrote:
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Today's Topics:

   1. hvc console not working on 4.4.0 guest (M A Young)

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

        Michael Young

Hi Michael,

Yes it's a known problem, the patch for it was just accepted into the tip tree:


So it will land in 4.4-final, the 2 patches causing this regression were unfortunately also already backported to the stable trees (despite objection), but hopefully the fix wil also hit stable in the next round.


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