On 9/8/26 11:03 AM, 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 <[email protected]> --- v2: - Clarify the commit message to state that the 4K PUD arithmetic is intentionally dropped reported by Sashiko. --- Documentation/arch/powerpc/vmemmap_dedup.rst | 90 ++++---------------- Documentation/mm/vmemmap_dedup.rst | 32 +------ 2 files changed, 21 insertions(+), 101 deletions(-)
Acked-by: Qi Zheng <[email protected]> Thanks, Qi
