RE: [Xen-devel] Panic:: handle_irq_event_percpu

["Huang2, Wei" <Wei.Huang2@xxxxxxx>]

It looks similar. 

Hi Sander, could you please test your system with the following options?

1. iommu=amd-iommu-perdev-intremap in xen.gz GRUB entry
2. pci=nosmi in pvops GRUB entry
3. iommu=0 in xen.gz GRUB entry [optional, only if (1) doesn't work for you]

We were seeing an issue which was caused by messed-up interrupt remap table. 
George Dunlap's perdev interrupt map solved our problem.

Thanks,
-Wei

-----Original Message-----
From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@xxxxxxxxxx] 
Sent: Wednesday, October 19, 2011 11:08 AM
To: Sander Eikelenboom; Huang2, Wei
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Panic:: handle_irq_event_percpu

On Tue, Oct 18, 2011 at 08:55:19PM +0200, Sander Eikelenboom wrote:
> Hi Konrad,
> 
> On my system (AND phenom x6, 8gb mem) running xen 4.1.2-rc3
> and a custom kernel based on:
> 
> - your linux-next branch
> - pulled in your apci/cpufreq branch
> - pulled in latest patches from linuses tree

Wei,
Are those similar to what you had been seeing?

> 
> I'm experiencing infrequent panics at boot (say 1 out of 10 or 20 boots), 
> doesn't seem to matter if it's a cold or a warm boot.
> It always seem to happen during or shortly after booting. When it doesn't 
> occur then, it can run for at least several days/weeks (haven't seen it panic 
> then).
> It doesn't seem to happen at a particular point at or shortly after booting, 
> but it happens before starting any guests
> 
> Unfortunately i haven't had serial console enabled at these times, but i have 
> made some photo's.
> The first 3 times it locked completely before being able to print a 
> stacktrace, the 4th time it did (although the photo is a bit unsharp).
> 
> 
> So all in all, it kind of strange, i hope you can figure something out from 
> the stacktrace, if not, i will see if i can try with serial console attached.
> 
> --
> Sander





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