[PATCH v2 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.  Based on the discussion on v1, this version goes in the
direction of changing the behavior of memory hotplug for hwpoison:

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

I tested both with ACPI-based and sysfs-based memory hotplug, and passed
basic testcases.

Any comments and feedbacks would be appreciated.

Thanks,
Naoya Horiguchi

v1: https://lore.kernel.org/linux-mm/20220427042841.678351-1-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    | 36 ++++++++++++++++++++++++++++++++++++
 include/linux/memory.h   |  3 +++
 include/linux/mm.h       | 12 ++++++++++++
 include/linux/swapops.h  | 25 -------------------------
 mm/internal.h            |  8 --------
 mm/memory-failure.c      | 45 +++++++++++++++++++++++----------------------
 mm/memory_hotplug.c      | 22 +++++++++++-----------
 mm/sparse.c              |  2 --
 9 files changed, 87 insertions(+), 71 deletions(-)