The patch titled
Subject: mm/hwpoison: check the subpage, not the head page
has been added to the -mm tree. Its filename is
mm-hwpoison-check-the-subpage-not-the-head-page.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-hwpoison-check-the-subpage-not-the-head-page.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-hwpoison-check-the-subpage-not-the-head-page.patch
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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/rmap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/mm/rmap.c~mm-hwpoison-check-the-subpage-not-the-head-page
+++ a/mm/rmap.c
@@ -1553,7 +1553,7 @@ static bool try_to_unmap_one(struct page
/* 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 pa
* 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);
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-hwpoison-check-the-subpage-not-the-head-page.patch
