This is a note to let you know that I've just added the patch titled
mm: hwpoison: handle non-anonymous THP correctly
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-hwpoison-handle-non-anonymous-thp-correctly.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4966455d9100236fd6dd72b0cd00818435fdb25d Mon Sep 17 00:00:00 2001
From: Yang Shi <shy828301@xxxxxxxxx>
Date: Fri, 5 Nov 2021 13:41:14 -0700
Subject: mm: hwpoison: handle non-anonymous THP correctly
From: Yang Shi <shy828301@xxxxxxxxx>
commit 4966455d9100236fd6dd72b0cd00818435fdb25d upstream.
Currently hwpoison doesn't handle non-anonymous THP, but since v4.8 THP
support for tmpfs and read-only file cache has been added. They could
be offlined by split THP, just like anonymous THP.
Link: https://lkml.kernel.org/r/20211020210755.23964-7-shy828301@xxxxxxxxx
Signed-off-by: Yang Shi <shy828301@xxxxxxxxx>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1440,14 +1440,11 @@ static int identify_page_state(unsigned
static int try_to_split_thp_page(struct page *page, const char *msg)
{
lock_page(page);
- if (!PageAnon(page) || unlikely(split_huge_page(page))) {
+ if (unlikely(split_huge_page(page))) {
unsigned long pfn = page_to_pfn(page);
unlock_page(page);
- if (!PageAnon(page))
- pr_info("%s: %#lx: non anonymous thp\n", msg, pfn);
- else
- pr_info("%s: %#lx: thp split failed\n", msg, pfn);
+ pr_info("%s: %#lx: thp split failed\n", msg, pfn);
put_page(page);
return -EBUSY;
}
Patches currently in stable-queue which might be from shy828301@xxxxxxxxx are
queue-5.15/mm-hwpoison-refactor-refcount-check-handling.patch
queue-5.15/mm-shmem-don-t-truncate-page-if-memory-failure-happens.patch
queue-5.15/mm-hwpoison-handle-non-anonymous-thp-correctly.patch
