Re: [PATCH v5 09/12] powerpc/mm: switch device DAX to shared tail vmemmap pages

On 9/27/26 04:54, Muchun Song wrote:

The powerpc radix compound vmemmap population path still finds a reusable
tail page by walking the vmemmap page tables.

Switch it to the common vmemmap_shared_tail_page() helper instead, so it
can use the shared vmemmap page directly to simplify the code.

This removes the powerpc-specific tail-page lookup and its fallback path
and aligns the device DAX vmemmap optimization path with HugeTLB.

Signed-off-by: Muchun Song <redacted>
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I did not grasp all the complexity of the old approach, but what i read here all
makes sense to me.

Acked-by: David Hildenbrand (Arm) <david@kernel.org>

-- 
Cheers,

David