[PATCH v3 3/8] mm/hwpoison: fix race against poison thp

v1 -> v2: * unpoison thp fail There is a race between hwpoison page and unpoison page, memory_failure set the page hwpoison and increase num_poisoned_pages without hold page lock, and one page count will be accounted against thp for num_poisoned_pages. However, unpoison can occur before

[PATCH v3 3/8] mm/hwpoison: fix race against poison thp

v1 - v2: * unpoison thp fail There is a race between hwpoison page and unpoison page, memory_failure set the page hwpoison and increase num_poisoned_pages without hold page lock, and one page count will be accounted against thp for num_poisoned_pages. However, unpoison can occur before