The patch titled
Subject: mm: memory-failure: fix unexpected return value in soft_offline_page()
has been added to the -mm mm-unstable branch. Its filename is
mm-memory-failure-fix-unexpected-return-value-in-soft_offline_page.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory-failure-fix-unexpected-return-value-in-soft_offline_page.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm: memory-failure: fix unexpected return value in soft_offline_page()
Date: Tue, 27 Jun 2023 19:28:08 +0800
When page_handle_poison() fails to handle the hugepage or free page in
retry path, soft_offline_page() will return 0 while -EBUSY is expected in
this case.
Link: https://lkml.kernel.org/r/20230627112808.1275241-1-linmiaohe@xxxxxxxxxx
Fixes: b94e02822deb ("mm,hwpoison: try to narrow window race for free pages")
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
--- a/mm/memory-failure.c~mm-memory-failure-fix-unexpected-return-value-in-soft_offline_page
+++ a/mm/memory-failure.c
@@ -2737,10 +2737,13 @@ retry:
if (ret > 0) {
ret = soft_offline_in_use_page(page);
} else if (ret == 0) {
- if (!page_handle_poison(page, true, false) && try_again) {
- try_again = false;
- flags &= ~MF_COUNT_INCREASED;
- goto retry;
+ if (!page_handle_poison(page, true, false)) {
+ if (try_again) {
+ try_again = false;
+ flags &= ~MF_COUNT_INCREASED;
+ goto retry;
+ }
+ ret = -EBUSY;
}
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-mm_initc-update-obsolete-comment-in-get_pfn_range_for_nid.patch
mm-memory-failure-fix-unexpected-return-value-in-soft_offline_page.patch
