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SubjectRe: [PATCH 2/4] Intel iommu: Speed up processing of the identity_mapping function


Chris Wright wrote:
> * Mike Travis (travis@sgi.com) wrote:
>> @@ -2138,6 +2134,7 @@ static int domain_add_dev_info(struct dm
>> list_add(&info->global, &device_domain_list);
>> pdev->dev.archdata.iommu = info;
>
> The si_domain is cached right here...can you not use this instead of
> adding an iommu impl. specific bit to pci_dev?
>
>> spin_unlock_irqrestore(&device_domain_lock, flags);
>> + pdev->is_identity_mapped = (domain == si_domain);

Yes, it looks like I came at the solution backwards... I added
the bit then figured out how to set it. I'll update that patch.


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