[PATCH 0/4] hwpoison fixes for v4.2

From: Naoya Horiguchi
Date: Tue May 12 2015 - 05:48:17 EST

There are some long-standing issues on hwpoison, so this patchset mentions
them. I explain details about each bug in individual patches. In summary:

Patch 1: fix the wrong behavior in failing thp split

Patch 2: fix inconsistent refcounting problem on thp tail pages

Patch 3: fix isolation in soft offlining with keeping refcount

Patch 4: potential fix for me_huge_page()

The user visible effects of patch 1 to 3 are kernel panic with BUG_ON,
so I believe that this patchset helps hwpoison to be more reliable.

This series is based on v4.1-rc3 + Xie XiuQi's patch "memory-failure:
export page_type and action result".

Naoya Horiguchi
Tree: https://github.com/Naoya-Horiguchi/linux/tree/v4.1-rc3/hwpoison_for_v4.2

Naoya Horiguchi (4):
mm/memory-failure: split thp earlier in memory error handling
mm/memory-failure: introduce get_hwpoison_page() for consistent refcount handling
mm: soft-offline: don't free target page in successful page migration
mm/memory-failure: me_huge_page() does nothing for thp

include/linux/mm.h | 1 +
mm/hwpoison-inject.c | 4 +-
mm/memory-failure.c | 164 +++++++++++++++++++--------------------------------
mm/migrate.c | 9 ++-
mm/swap.c | 2 -
5 files changed, 70 insertions(+), 110 deletions(-)--
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