linux-kernel - [PATCH 2/2] mm/memory-failure: remove the selection of RAS

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Message-ID: <20251103033536.52234-2-xieyuanbin1@huawei.com>
Date: Mon, 3 Nov 2025 11:35:36 +0800
From: Xie Yuanbin <xieyuanbin1@...wei.com>
To: <tglx@...utronix.de>, <mingo@...hat.com>, <bp@...en8.de>,
	<dave.hansen@...ux.intel.com>, <hpa@...or.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>,
	<linmiaohe@...wei.com>, <nao.horiguchi@...il.com>, <luto@...nel.org>,
	<peterz@...radead.org>, <tony.luck@...el.com>
CC: <x86@...nel.org>, <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
	<linux-edac@...r.kernel.org>, <will@...nel.org>, <liaohua4@...wei.com>,
	<lilinjie8@...wei.com>, Xie Yuanbin <xieyuanbin1@...wei.com>
Subject: [PATCH 2/2] mm/memory-failure: remove the selection of RAS

The commit 97f0b13452198290799f ("tracing: add trace event for
memory-failure") introduces the selection of RAS in memory-failure.
This commit is just a tracing feature; in reality, there is no dependency
between memory-failure and RAS. RAS increases the size of the bzImage
image by 8k, which is very valuable for embedded devices.

Signed-off-by: Xie Yuanbin <xieyuanbin1@...wei.com>
---
 mm/Kconfig          | 1 -
 mm/memory-failure.c | 2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index a5a90b169435..c3a8e0ba1ac1 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -738,11 +738,10 @@ config ARCH_SUPPORTS_MEMORY_FAILURE
 
 config MEMORY_FAILURE
 	depends on MMU
 	depends on ARCH_SUPPORTS_MEMORY_FAILURE
 	bool "Enable recovery from hardware memory errors"
-	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.
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index f698df156bf8..baf2bd79b2fb 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1276,11 +1276,13 @@ static void update_per_node_mf_stats(unsigned long pfn,
  * setting PG_dirty outside page lock. See also comment above set_page_dirty().
  */
 static int action_result(unsigned long pfn, enum mf_action_page_type type,
 			 enum mf_result result)
 {
+#ifdef CONFIG_RAS
 	trace_memory_failure_event(pfn, type, result);
+#endif
 
 	if (type != MF_MSG_ALREADY_POISONED) {
 		num_poisoned_pages_inc(pfn);
 		update_per_node_mf_stats(pfn, result);
 	}
-- 
2.51.0