The quilt patch titled
Subject: mm: memory-failure: fix unexpected return value in soft_offline_page()
has been removed from the -mm tree. Its filename was
mm-memory-failure-fix-unexpected-return-value-in-soft_offline_page.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
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.
Consequently the user will think soft_offline_page succeeds while it in
fact failed. So the user will not try again later 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>
Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
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
@@ -2741,10 +2741,13 @@ 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-memory-failure-fix-potential-page-refcnt-leak-in-memory_failure.patch
mm-memcg-fix-obsolete-function-name-in-mem_cgroup_protection.patch
mm-memory-failure-add-pageoffline-check.patch
mm-page_alloc-avoid-unneeded-alike_pages-calculation.patch
mm-memcg-update-obsolete-comment-above-parent_mem_cgroup.patch
mm-page_alloc-remove-unneeded-variable-base.patch
mm-memcg-fix-wrong-function-name-above-obj_cgroup_charge_zswap.patch
mm-memory-failure-use-helper-macro-llist_for_each_entry_safe.patch
mm-mm_init-use-helper-macro-bits_per_long-and-bits_per_byte.patch
