Re: [PATCH 0/2] iommu: Drop IOMMU_DEBUG_PAGEALLOC refs on iommupt domain teardown

[Yuanhe Shu]

On Thu, Aug 27, 2026 at 04:05:14PM +0000, Mostafa Saleh wrote:
> Which drivers cause this?

None that I can point to.  The trigger was the generic_pt kunit suite,
which frees domains with live mappings, plus a module I wrote to confirm
the mechanism.  You and Jason are both right that an iommu API user has to
unmap, so the premise of the series was wrong; I am dropping it and fixing
the kunit cases to unmap instead.

And from your reply on 1/2:

> But the IOVA can be calculated when walking the table from freeing
> context or am I missing something?

You weren't missing anything - Jason pointed out the same thing, and no
iova_to_phys() is involved: pts->range->va already holds the IOVA of the
current iteration position.

Thanks,
Yuanhe