From da358d5c0e589a7a594551951a9631091e5479b6 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox (Oracle) Date: Tue, 22 Mar 2022 14:46:38 -0700 Subject: mm/hwpoison: check the subpage, not the head page Hardware poison is tracked on a per-page basis, not on the head page. Link: https://lkml.kernel.org/r/20220130013042.1906881-1-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Acked-by: Naoya Horiguchi Reviewed-by: Yang Shi Cc: David Rientjes Cc: Mike Kravetz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/rmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'mm') diff --git a/mm/rmap.c b/mm/rmap.c index 6a1e8c7f6213..09b08888120e 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1553,7 +1553,7 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma, /* Update high watermark before we lower rss */ update_hiwater_rss(mm); - if (PageHWPoison(page) && !(flags & TTU_IGNORE_HWPOISON)) { + if (PageHWPoison(subpage) && !(flags & TTU_IGNORE_HWPOISON)) { pteval = swp_entry_to_pte(make_hwpoison_entry(subpage)); if (PageHuge(page)) { hugetlb_count_sub(compound_nr(page), mm); @@ -1873,7 +1873,7 @@ static bool try_to_migrate_one(struct page *page, struct vm_area_struct *vma, * memory are supported. */ subpage = page; - } else if (PageHWPoison(page)) { + } else if (PageHWPoison(subpage)) { pteval = swp_entry_to_pte(make_hwpoison_entry(subpage)); if (PageHuge(page)) { hugetlb_count_sub(compound_nr(page), mm); -- cgit v1.2.3