[PATCH v1 0/2] mm: soft-offline: fix race against page allocation

[Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>]

Xishi recently reported the issue about race on reusing the target pages
of soft offlining.
Discussion and analysis showed that we need make sure that setting PG_hwpoison
should be done in the right place under zone->lock for soft offline.
1/2 handles free hugepage's case, and 2/2 hanldes free buddy page's case.

Thanks,
Naoya Horiguchi
---
Summary:

Naoya Horiguchi (2):
      mm: fix race on soft-offlining free huge pages
      mm: soft-offline: close the race against page allocation

 include/linux/page-flags.h |  5 +++++
 include/linux/swapops.h    | 10 ----------
 mm/hugetlb.c               | 11 +++++------
 mm/memory-failure.c        | 44 +++++++++++++++++++++++++++++++++++---------
 mm/migrate.c               |  4 +---
 mm/page_alloc.c            | 29 +++++++++++++++++++++++++++++
 6 files changed, 75 insertions(+), 28 deletions(-)