Re: [Xen-devel] [BUG] 'o' debug key panics the hypervisor

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 27.08.15 at 20:33, <konrad.wilk@xxxxxxxxxx> wrote:
> On Thu, Aug 27, 2015 at 04:07:36PM +0200, Roger Pau Monnà wrote:
>> El 27/08/15 a les 16.01, Jan Beulich ha escrit:
>> >>>> On 27.08.15 at 13:29, <roger.pau@xxxxxxxxxx> wrote:
>> >> When using Intel hardware without shared page tables between the IOMMU 
>> >> and EPT (I have not tried if the same happens when sharing the page 
>> >> tables), the following crash happens if I press the 'o' debug key with 
>> >> a HVM guest running. The guest doesn't have any device passed-through.
>> > 
>> > This last thing is the relevant one: No-one ever cared to use 'o' without
>> > also passing through a device.
>> 
>> I have to admit I discovered this when I thought I was typing at the
>> Dom0 console but it turns out I had it switched to the Xen console...
>> Anyway, it shouldn't crash Xen.
> 
> And it would be called by '*' which is often used in the field to
> collect data.

No, it (intentionally due to the huge amount of output it can
generate) is excluded from '*' processing by having its "diagnostic"
field set to false.

> I concur on the not-crashing Xen part.

Sure, that's why it got fixed.

Jan

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