[mm-unstable PATCH v7 0/8] mm, hwpoison: enable 1GB hugepage support (v7)

[Naoya Horiguchi]

Here is v7 of "enabling memory error handling on 1GB hugepage" patchset.

I applied feedbacks provided for v6 (thank you, Miaohe).
There're a few improvements on on 3/8 and 4/8.

- v1: https://lore.kernel.org/linux-mm/20220602050631.771414-1-naoya.horiguchi@xxxxxxxxx/T/#u
- v2: https://lore.kernel.org/linux-mm/20220623235153.2623702-1-naoya.horiguchi@xxxxxxxxx/T/#u
- v3: https://lore.kernel.org/linux-mm/20220630022755.3362349-1-naoya.horiguchi@xxxxxxxxx/T/#u
- v4: https://lore.kernel.org/linux-mm/20220704013312.2415700-1-naoya.horiguchi@xxxxxxxxx/T/#u
- v5: https://lore.kernel.org/linux-mm/20220708053653.964464-1-naoya.horiguchi@xxxxxxxxx/T/#u
- v6: https://lore.kernel.org/linux-mm/20220712032858.170414-1-naoya.horiguchi@xxxxxxxxx/T/#u

Thanks,
Naoya Horiguchi
---
Summary:

Naoya Horiguchi (8):
      mm/hugetlb: check gigantic_page_runtime_supported() in return_unused_surplus_pages()
      mm/hugetlb: make pud_huge() and follow_huge_pud() aware of non-present pud entry
      mm, hwpoison, hugetlb: support saving mechanism of raw error pages
      mm, hwpoison: make unpoison aware of raw error info in hwpoisoned hugepage
      mm, hwpoison: set PG_hwpoison for busy hugetlb pages
      mm, hwpoison: make __page_handle_poison returns int
      mm, hwpoison: skip raw hwpoison page in freeing 1GB hugepage
      mm, hwpoison: enable memory error handling on 1GB hugepage

 arch/x86/mm/hugetlbpage.c |   8 ++-
 include/linux/hugetlb.h   |  17 ++++-
 include/linux/mm.h        |   2 +-
 include/linux/swapops.h   |   9 +++
 include/ras/ras_event.h   |   1 -
 mm/hugetlb.c              |  58 +++++++++++----
 mm/memory-failure.c       | 179 ++++++++++++++++++++++++++++++++++++++--------
 7 files changed, 226 insertions(+), 48 deletions(-)