[PATCH v6 0/4] mm, hwpoison: improve handling workload related to hugetlb and memory_hotplug

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

Hi,

This patchset tries to solve the issue among memory_hotplug, hugetlb and hwpoison.
In this patchset, memory hotplug handles hwpoison pages like below:

  - hwpoison pages should not prevent memory hotremove,
  - memory block with hwpoison pages should not be onlined.

Changes in this version:

  - applied comments for previous versions (thank you, reviewers),
  - fixed a few build errors (sorry for making noises on linux-next),
  - unpoison_memory() properly cancels per-memblk hwpoison counter,
  - rebased onto akpm/mm-unstable on Oct 4.

Thanks,
Naoya Horiguchi

v1: https://lore.kernel.org/linux-mm/20220427042841.678351-1-naoya.horiguchi@linux.dev/T
v2: https://lore.kernel.org/linux-mm/20220905062137.1455537-1-naoya.horiguchi@linux.dev/T
v3-5: https://lore.kernel.org/linux-mm/20220921091359.25889-1-naoya.horiguchi@linux.dev/T
---
Summary:

Naoya Horiguchi (4):
      mm,hwpoison,hugetlb,memory_hotplug: hotremove memory section with hwpoisoned hugepage
      mm/hwpoison: move definitions of num_poisoned_pages_* to memory-failure.c
      mm/hwpoison: pass pfn to num_poisoned_pages_*()
      mm/hwpoison: introduce per-memory_block hwpoison counter

 arch/parisc/kernel/pdt.c |  5 ++--
 drivers/base/memory.c    | 40 +++++++++++++++++++++++++++
 include/linux/hugetlb.h  | 10 ++++---
 include/linux/memory.h   |  3 ++
 include/linux/mm.h       | 29 ++++++++++++++++++--
 include/linux/swapops.h  | 24 ++--------------
 mm/hugetlb.c             |  9 +++---
 mm/internal.h            |  8 ------
 mm/memory-failure.c      | 71 +++++++++++++++++++++++++++---------------------
 mm/sparse.c              |  2 --
 10 files changed, 125 insertions(+), 76 deletions(-)