[PATCH v1 0/5] mm, hwpoison: enable 1GB hugepage support

[Naoya Horiguchi <naoya.horiguchi@linux.dev>]

Hi,

This patchset enables memory error handling on 1GB hugepage.

"Save raw error page" patch (1/4 of patchset [1]) is necessary, so it's
included in this series (the remaining part of hotplug related things are
still in progress).  Patch 2/5 solves issues in a corner case of hugepage
handling, which might not be the main target of this patchset, but slightly
related.  It was posted separately [2] but depends on 1/5, so I group them
together.

Patch 3/5 to 5/5 are main part of this series and fix a small issue about
handling 1GB hugepage, which I hope will be workable.

[1]: https://lore.kernel.org/linux-mm/20220427042841.678351-1-naoya.horiguchi@linux.dev/T/#u

[2]: https://lore.kernel.org/linux-mm/20220511151955.3951352-1-naoya.horiguchi@linux.dev/T/

Please let me know if you have any suggestions and comments.

Thanks,
Naoya Horiguchi
---
Summary:

Naoya Horiguchi (5):
      mm, hwpoison, hugetlb: introduce SUBPAGE_INDEX_HWPOISON to save raw error page
      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

 include/linux/hugetlb.h | 24 ++++++++++++++++++++++++
 include/linux/mm.h      |  2 +-
 include/ras/ras_event.h |  1 -
 mm/hugetlb.c            |  9 +++++++++
 mm/memory-failure.c     | 48 +++++++++++++++++++++---------------------------
 5 files changed, 55 insertions(+), 29 deletions(-)