Re: [PATCH rfcv1 7/8] iommu/arm-smmu-v3: Add arm_smmu_invs based arm_smmu_domain_inv_range()
From: Jason Gunthorpe <jgg@nvidia.com>
Date: 2025-09-08 15:39:16
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linux-iommu, linux-patches, lkml
On Sat, Sep 06, 2025 at 01:12:33AM -0700, Nicolin Chen wrote:
I know that performance-wise, this piece will be a quick respin, as the attach side releases the lock very fast. It still looks a bit complicated. And practically, it would respin even if the attachment removes a non-PCI device, right?
If you are paying the cost of taking the lock then it should become fully locked and consistent. Jason