Re: [PATCH 3/6] KVM: s390: fix sigp sense running condition code handling

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On 26.06.2012, at 17:57, Cornelia Huck wrote:

> On Tue, 26 Jun 2012 17:36:19 +0200
> Alexander Graf <agraf@xxxxxxx> wrote:
> 
>> 
>> On 26.06.2012, at 17:33, Cornelia Huck wrote:
>> 
>>> On Tue, 26 Jun 2012 16:52:56 +0200
>>> Alexander Graf <agraf@xxxxxxx> wrote:
>>> 
>>>> 
>>>> On 26.06.2012, at 16:06, Cornelia Huck wrote:
>>>> 
>>>>> From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
>>>>> 
>>>>> Only if the sensed cpu is not running a status is stored, which
>>>>> is reflected by condition code 1. If the cpu is running, condition
>>>>> code 0 should be returned.
>>>>> Just the opposite of what the code is doing.
>>>>> 
>>>>> Acked-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
>>>>> Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
>>>>> Signed-off-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
>>>> 
>>>> Yikes. Is this a stable candidate?
>>> 
>>> This code will only hit when running on a host running virtualized
>>> itself (where sigp sense running will cause an intercept), so I doubt
>>> many people will see the effects.
>> 
>> You mean this will hit when running kvm inside of a z/VM VM? That's a pretty valid use case.
> 
> I'd have thought it was a very uncommon one. But I certainly don't
> object against putting the fix into stable.

It's not exactly useful for productive things, but just for prototyping KVM, people tend to not have spare LPARs lying around :)
So yes, this should go into stable.


Alex

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