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authorNaoya Horiguchi <naoya.horiguchi@nec.com>2022-07-14 07:24:17 +0300
committerAndrew Morton <akpm@linux-foundation.org>2022-08-09 04:06:44 +0300
commit38f6d29397ccb9c191c4c91103e8123f518fdc10 (patch)
tree52b39712979fd983a3e5134fcb6803f9454ca875 /include/linux
parentac5fcde0a96a18773f06b7c00c5ea081bbdc64b3 (diff)
downloadlinux-38f6d29397ccb9c191c4c91103e8123f518fdc10.tar.xz
mm, hwpoison: set PG_hwpoison for busy hugetlb pages
If memory_failure() fails to grab page refcount on a hugetlb page because it's busy, it returns without setting PG_hwpoison on it. This not only loses a chance of error containment, but breaks the rule that action_result() should be called only when memory_failure() do any of handling work (even if that's just setting PG_hwpoison). This inconsistency could harm code maintainability. So set PG_hwpoison and call hugetlb_set_page_hwpoison() for such a case. Link: https://lkml.kernel.org/r/20220714042420.1847125-6-naoya.horiguchi@linux.dev Fixes: 405ce051236c ("mm/hwpoison: fix race between hugetlb free/demotion and memory_failure_hugetlb()") Signed-off-by: Naoya Horiguchi <naoya.horiguchi@nec.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Cc: David Hildenbrand <david@redhat.com> Cc: kernel test robot <lkp@intel.com> Cc: Liu Shixin <liushixin2@huawei.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Yang Shi <shy828301@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e6e201a4ce05..0345b8c30394 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3176,6 +3176,7 @@ enum mf_flags {
MF_SOFT_OFFLINE = 1 << 3,
MF_UNPOISON = 1 << 4,
MF_SW_SIMULATED = 1 << 5,
+ MF_NO_RETRY = 1 << 6,
};
int mf_dax_kill_procs(struct address_space *mapping, pgoff_t index,
unsigned long count, int mf_flags);