[PATCH v4 0/2] mm/memory-failure: don't allow to unpoison hw corrupted page

[zhenwei pi <pizhenwei@bytedance.com>]

v3 -> v4:
- Add debug entry "hwpoisoned-pages" to show the number of hwpoisoned
  pages.
- Disable unpoison when a read HW memory failure occurs.

v2 -> v3:
- David pointed out that virt_to_kpte() is broken(no pmd_large() test
  on a PMD), so drop this API in this patch, walk kmap instead.

v1 -> v2:
- this change gets protected by mf_mutex
- use -EOPNOTSUPP instead of -EPERM 

v1:
- check KPTE to avoid to unpoison hardware corrupted page

zhenwei pi (2):
  mm/memory-failure: introduce "hwpoisoned-pages" entry
  mm/memory-failure: disable unpoison once hw error happens

 Documentation/vm/hwpoison.rst |  7 ++++++-
 mm/hwpoison-inject.c          | 25 ++++++++++++++++++++++++-
 mm/memory-failure.c           |  1 +
 3 files changed, 31 insertions(+), 2 deletions(-)

-- 
2.20.1