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

[David Hildenbrand (Red Hat)]

On 1/19/26 16:09, Mostafa Saleh wrote:
> On Mon, Jan 19, 2026 at 2:27 PM David Hildenbrand (Red Hat)
> <david@xxxxxxxxxx> wrote:
> > 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@xxxxxxxxxxxxxx/
> > >
> > > 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@xxxxxxxxxx/
> > >
> > > 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?
>
> It should be stable according to Will:
> https://lore.kernel.org/linux-iommu/20260114164322.787125-1-smostafa@xxxxxxxxxx/T/#m59d0b455e3f2160cb6f9980a0ae65bc481c53898

Shame, probably applied a bit too fast ...

--
Cheers

David