linux-kernel - [PATCH] mm/memory-failure: not select MEMORY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20250922143618.48640-1-xieyuanbin1@huawei.com>
Date: Mon, 22 Sep 2025 22:36:18 +0800
From: Xie Yuanbin <xieyuanbin1@...wei.com>
To: <linmiaohe@...wei.com>, <nao.horiguchi@...il.com>,
	<akpm@...ux-foundation.org>, <david@...hat.com>,
	<lorenzo.stoakes@...cle.com>, <Liam.Howlett@...cle.com>, <vbabka@...e.cz>,
	<rppt@...nel.org>, <surenb@...gle.com>, <mhocko@...e.com>
CC: <will@...nel.org>, <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm/memory-failure: not select MEMORY_ISOLATION

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.

Acked-by: David Hildenbrand <david@...hat.com>
Signed-off-by: Xie Yuanbin <xieyuanbin1@...wei.com>
---
 mm/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index 034a1662d8c1..0e26f4fc8717 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -742,21 +742,20 @@ config DEFAULT_MMAP_MIN_ADDR
 	  This value can be changed after boot using the
 	  /proc/sys/vm/mmap_min_addr tunable.
 
 config ARCH_SUPPORTS_MEMORY_FAILURE
 	bool
 
 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
 	  with MCA recovery. This allows a system to continue running
 	  even when some of its memory has uncorrected errors. This requires
 	  special hardware support and typically ECC memory.
 
 config HWPOISON_INJECT
 	tristate "HWPoison pages injector"
 	depends on MEMORY_FAILURE && DEBUG_KERNEL && PROC_FS
-- 
2.48.1