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SubjectRe: [PATCH 8/9] x86/amd-iommu: Search for existind dev_data before allocting a new one
* Joerg Roedel ( wrote:
> +static struct iommu_dev_data *search_dev_data(u16 devid)
> +{
> + struct iommu_dev_data *dev_data;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&dev_data_list_lock, flags);
> + list_for_each_entry(dev_data, &dev_data_list, dev_data_list) {
> + if (dev_data->devid == devid)

This devid match on a global list is not going to work in a multi-segment
machine. I guess non-zero segment function would either not exist or go
through swiotlb since it's not supported by hw def'n, so only a concern
for the future (along with the other devid based lookup tables).


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