+ mm-memory-failure-not-select-memory_isolation.patch added to mm-new branch

+ mm-memory-failure-not-select-memory_isolation.patch added to mm-new branch

[Andrew Morton]

The patch titled
     Subject: mm/memory-failure: don't select MEMORY_ISOLATION
has been added to the -mm mm-new branch.  Its filename is
     mm-memory-failure-not-select-memory_isolation.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-not-select-memory_isolation.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

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------------------------------------------------------
From: Xie Yuanbin <xieyuanbin1@huawei.com>
Subject: mm/memory-failure: don't select MEMORY_ISOLATION
Date: Mon, 22 Sep 2025 22:36:18 +0800

We added that "select MEMORY_ISOLATION" in commit ee6f509c3274 ("mm:
factor out memory isolate functions").  However, in commit add05cecef80
("mm: soft-offline: don't free target page in successful page migration")
we remove the need for it, where we removed the calls to
set_migratetype_isolate() etc.

What CONFIG_MEMORY_FAILURE soft-offline support wants is migrate_pages()
support.  But that comes with CONFIG_MIGRATION.  And
isolate_folio_to_list() has nothing to do with CONFIG_MEMORY_ISOLATION.

Therefore, we can remove "select MEMORY_ISOLATION" of MEMORY_FAILURE.

Link: https://lkml.kernel.org/r/20250922143618.48640-1-xieyuanbin1@huawei.com
Signed-off-by: Xie Yuanbin <xieyuanbin1@huawei.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/Kconfig |    1 -
 1 file changed, 1 deletion(-)

--- a/mm/Kconfig~mm-memory-failure-not-select-memory_isolation
+++ a/mm/Kconfig
@@ -748,7 +748,6 @@ config MEMORY_FAILURE
 	depends on MMU
 	depends on ARCH_SUPPORTS_MEMORY_FAILURE
 	bool "Enable recovery from hardware memory errors"
-	select MEMORY_ISOLATION
 	select RAS
 	help
 	  Enables code to recover from some memory failures on systems
_

Patches currently in -mm which might be from xieyuanbin1@huawei.com are

mm-memory-failure-not-select-memory_isolation.patch