diff options
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index e187454d82f6..e62ddb8f24b6 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1162,7 +1162,12 @@ static void __split_huge_page_refcount(struct page *page) /* after clearing PageTail the gup refcount can be released */ smp_mb(); - page_tail->flags &= ~PAGE_FLAGS_CHECK_AT_PREP; + /* + * retain hwpoison flag of the poisoned tail page: + * fix for the unsuitable process killed on Guest Machine(KVM) + * by the memory-failure. + */ + page_tail->flags &= ~PAGE_FLAGS_CHECK_AT_PREP | __PG_HWPOISON; page_tail->flags |= (page->flags & ((1L << PG_referenced) | (1L << PG_swapbacked) | @@ -1847,7 +1852,6 @@ static void collapse_huge_page(struct mm_struct *mm, set_pmd_at(mm, address, pmd, _pmd); spin_unlock(&mm->page_table_lock); anon_vma_unlock(vma->anon_vma); - mem_cgroup_uncharge_page(new_page); goto out; } @@ -1893,6 +1897,7 @@ out_up_write: return; out: + mem_cgroup_uncharge_page(new_page); #ifdef CONFIG_NUMA put_page(new_page); #endif |
