Re: [PATCH 0/2] iommu: debug-pagealloc: Remove pfn_valid() usage

David Hildenbrand (Red Hat)
2026-01-19T14:27:04Z

On 1/19/26 15:22, Mostafa Saleh wrote:
> This is a small fix for the new config IOMMU_DEBUG_PAGEALLOC based
> on the discussion:
> https://lore.kernel.org/linux-iommu/CAFgf54pBAUm3ao-UJksiuGKtvv4wzRyFq_uKwLe0H1ettO4DLQ@mail.gmail.com/
>
> Where it was concluded that pfn_valid() is not enough to validate
> physical addresses before access to page_ext.
>
> The first patch introduces a new function in page_ext that takes a
> physical address as an argument, and the second patch uses it instead
> of calling pfn_valid() and phys_to_page()
>
> Benchmarks with the new implementation can be found in:
> https://lore.kernel.org/linux-iommu/20260114164322.787125-1-smostafa@google.com/
>
> This series applies to iommu/core tree.

This is part of v7 [1], right? Can't we just apply v7 instead or are the
commit IDs already stable?

[1] https://lkml.kernel.org/r/20260114164322.787125-1-smostafa@google.com

--
Cheers

David