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authorNaoya Horiguchi <naoya.horiguchi@nec.com>2021-06-28 19:43:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-06-29 10:53:56 -0700
commit0ed950d1f28142ccd9a9453c60df87853530d778 (patch)
tree9eefd32cb6519948f8ad8da0d6ed8e4d7ef464bd /lib/Makefile
parenta3f5d80ea401ac857f2910e28b15f35b2cf902f4 (diff)
mm,hwpoison: make get_hwpoison_page() call get_any_page()
__get_hwpoison_page() could fail to grab refcount by some race condition, so it's helpful if we can handle it by retrying. We already have retry logic, so make get_hwpoison_page() call get_any_page() when called from memory_failure(). As a result, get_hwpoison_page() can return negative values (i.e. error code), so some callers are also changed to handle error cases. soft_offline_page() does nothing for -EBUSY because that's enough and users in userspace can easily handle it. unpoison_memory() is also unchanged because it's broken and need thorough fixes (will be done later). Link: https://lkml.kernel.org/r/20210603233632.2964832-3-nao.horiguchi@gmail.com Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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