Re: [PATCH v5 12/12] Documentation/mm: update DAX vmemmap deduplication docs

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

Device DAX now uses the common per-zone shared tail page for vmemmap
deduplication. The old documentation still described a DAX-specific
layout with a separately populated tail vmemmap page and half the HugeTLB
savings.

Update the generic and powerpc documentation to describe the shared layout.
In the powerpc document, keep the radix and 64K-specific details, drop the
duplicated 4K PUD arithmetic, and replace the repeated device-dax diagrams
with a single parameterized PMD/PUD diagram.

Signed-off-by: Muchun Song <redacted>
Acked-by: Qi Zheng <qi.zheng@linux.dev>
---

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

-- 
Cheers,

David