Re: [PATCH v5 1/4] iommu: Add page_ext for IOMMU_DEBUG_PAGEALLOC

[Mostafa Saleh <smostafa@google.com>]

On Wed, Jan 07, 2026 at 05:53:50PM +0100, David Hildenbrand (Red Hat) wrote:
> On 1/6/26 17:21, Mostafa Saleh wrote:
> > Add a new config IOMMU_DEBUG_PAGEALLOC, which registers new data to
> > page_ext.
> > 
> > This config will be used by the IOMMU API to track pages mapped in
> > the IOMMU to catch drivers trying to free kernel memory that they
> > still map in their domains, causing all types of memory corruption.
> > 
> > This behaviour is disabled by default and can be enabled using
> > kernel cmdline iommu.debug_pagealloc.
> > 
> > Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
> > Signed-off-by: Mostafa Saleh <smostafa@google.com>
> > ---
> 
> I think I acked it, but maybe too late for you to spot it
> 
> for the MM bits
> 
> Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>

Thanks! If my mail client is not acting, it seems that was the
same version(v5) also.

Thanks,
Mostafa

> 
> -- 
> Cheers
> 
> David