[PATCH 7/8] iommu/intel: Support the gfp argument to the map_pages op

[Baolu Lu]

On 2023/1/17 11:38, Tian, Kevin wrote:
>> From: Jason Gunthorpe<jgg at nvidia.com>
>> Sent: Saturday, January 7, 2023 12:43 AM
>>
>> @@ -2368,7 +2372,7 @@ static int iommu_domain_identity_map(struct
>> dmar_domain *domain,
>>
>>   	return __domain_mapping(domain, first_vpfn,
>>   				first_vpfn, last_vpfn - first_vpfn + 1,
>> -				DMA_PTE_READ|DMA_PTE_WRITE);
>> +				DMA_PTE_READ|DMA_PTE_WRITE,
>> GFP_KERNEL);
>>   }
> Baolu, can you help confirm whether switching from GFP_ATOMIC to
> GFP_KERNEL is OK in this path? it looks fine to me in a quick glance
> but want to be conservative here.

This is also good for me. The memory notifier callback runs in a process
context and allowed to block.

Best regards,
baolu