Re: [PATCH 6.12.y] mm/huge_memory: drop beyond-EOF folios with the right number of refs

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

Summary of potential issues:
⚠️ Found matching upstream commit but patch is missing proper reference to it

Found matching upstream commit: 14efb4793519d73fb2902bb0ece319b886e4b4b9

Status in newer kernel trees:
6.13.y | Not found

Note: The patch differs from the upstream commit:
---
1:  14efb4793519d ! 1:  8e2adc6066c3d mm/huge_memory: drop beyond-EOF folios with the right number of refs
    @@ Commit message
         Cc: Yu Zhao <yuzhao@google.com>
         Cc: <stable@vger.kernel.org>
         Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    +    (cherry picked from commit 14efb4793519d73fb2902bb0ece319b886e4b4b9)
     
      ## mm/huge_memory.c ##
     @@ mm/huge_memory.c: static void __split_huge_page(struct page *page, struct list_head *list,
    @@ mm/huge_memory.c: static void __split_huge_page(struct page *page, struct list_h
      			__filemap_remove_folio(tail, NULL);
     -			folio_put(tail);
     +			folio_put_refs(tail, folio_nr_pages(tail));
    - 		} else if (!folio_test_anon(folio)) {
    - 			__xa_store(&folio->mapping->i_pages, tail->index,
    - 					tail, 0);
    + 		} else if (!PageAnon(page)) {
    + 			__xa_store(&folio->mapping->i_pages, head[i].index,
    + 					head + i, 0);
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.12.y       |  Success    |  Success   |