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Re: [PATCH 09/10] dom0less: Reinitialise all variables on each loop iteration
- To: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 22 Jul 2025 15:35:49 +0200
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- Cc: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 22 Jul 2025 13:36:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 22.07.2025 15:31, Alejandro Vallejo wrote:
> On Tue Jul 22, 2025 at 2:57 PM CEST, Jan Beulich wrote:
>> On 22.07.2025 14:37, Alejandro Vallejo wrote:
>>> On Tue Jul 22, 2025 at 2:18 PM CEST, Jan Beulich wrote:
>>>> On 22.07.2025 13:59, Alejandro Vallejo wrote:
>>>>> Reduce the scope of every variable so they are reinitialised. "iommu",
>>>>> for instance, isn't being cleared, so the wrong flags may make it to
>>>>> domains that should not have them.
>>>>
>>>> Yet "for instance" isn't quite right, is it? "iommu" is the only one where
>>>> the (re)init was misplaced. The other two ...
>>>
>>> We do strive for minimal scope where possible. But you're right "for
>>> instance"
>>> might be misleading in suggesting there's more bugs than one.
>>>
>>> I'm happy to have "for instance" removed, leaving the rest as-is, if that
>>> works
>>> for you.
>>
>> Except that "every" isn't quite right either. Nor is "they".
>
> Ok, take 3:
>
> Reduce the scope of dom0less_iommu, iommu and cpupool_node. iommu, in
> particular, wasn't being cleared, so the wrong flags may make it to
> domains that should not have them.
Fine with me, thanks.
Jan
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