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Fri, 14 Aug 2026 16:31:01 +0800 (CST) Received: from dggemv712-chm.china.huawei.com (unknown [10.1.198.32]) by mail.maildlp.com (Postfix) with ESMTPS id 11FBC203C8; Fri, 14 Aug 2026 16:41:38 +0800 (CST) Received: from kwepemq500010.china.huawei.com (7.202.194.235) by dggemv712-chm.china.huawei.com (10.1.198.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Fri, 14 Aug 2026 16:41:37 +0800 Received: from [10.173.124.160] (10.173.124.160) by kwepemq500010.china.huawei.com (7.202.194.235) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Fri, 14 Aug 2026 16:41:36 +0800 Subject: Re: [PATCH v2] mm/Kconfig: make MEMORY_FAILURE select MIGRATION To: Xie Yuanbin CC: , , , , , , , , , , , , , , , , , , , , , , References: <20260813134916.292733-1-xieyuanbin1@huawei.com> From: Miaohe Lin Message-ID: <827fab66-1678-dc37-7b3f-e7b0a2987427@huawei.com> Date: Fri, 14 Aug 2026 16:41:36 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20260813134916.292733-1-xieyuanbin1@huawei.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.173.124.160] X-ClientProxiedBy: kwepems200001.china.huawei.com (7.221.188.67) To kwepemq500010.china.huawei.com (7.202.194.235) X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: A4350180004 X-Stat-Signature: wuesprcptkzice87yppwxpo98ryfoqqn X-Rspam-User: X-HE-Tag: 1786696902-72797 X-HE-Meta: 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 kA0O2uGV R1DHsKy7ozTC0B7I2Jnz4SZvp9IL3EFamZteGUaHHthGUpmwFc9iUsFoqDAeDfN5Nfrqp4RW0Q+DADb6st5tXqhDQNXq8Mn4pBjxV0LLRqAEq8lDsr+IelFjWBUJk9Oz9nxEVIGa4PV1C+59iSDfB0qdLSzTDhitkAYD1g5IIGEcpLknSXIUbx6laalS8vZTp9M8jXj1z6n+kUutsSyQI9GEkefgWmKx6TRAKKua3CcrjCGmo9M4+mLSiHH8ctVDbhOnUeUmrYOqvnbg19QVRMwwTjk6SLTw+SSJMEd3ppr0S/aMuxZND/BiBUSBgW8F8wSv58bns4M8OTLsFQIyxX0a+Dn+q68FPWVC3y3FCPZbDaHkfSaxrp2o0gyhpjcpXNFN5Rrind7TYkhPUaNu/T8/eTI5sxz8pamDX+Ayyvm7EerzEg7eNG6wxxL77m5q3GCmS Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 2026/8/13 21:49, Xie Yuanbin wrote: > For embedded devices, lacking support for NUMA, memory hotplug/hotremove, > CMA and huge pages is a quite common scenario. In this scenario, the > demand for contiguous physical memory allocation is very low. To reduce > the kernel image size, some devices disable the compaction. However, > their SoCs do support DDR ECC, meaning that memory-failure may be needed. > > Migration is very useful for soft_offline_page() in memory-failure, which > may be triggered by correctable memory errors. Most anonymous and > file-mapped faulty pages can be migrated to other healthy pages. > > Currently, MEMORY_FAILURE does not explicitly select MIGRATION. When > COMPACTION, MEMORY_HOTREMOVE, NUMA_MIGRATION and CMA are all disabled, > MEMORY_FAILURE can be enabled, but MIGRATION cannot be selected. > > Make MEMORY_FAILURE select MIGRATION to handle this situation. > > Suggested-by: Mike Rapoport > Cc: Lorenzo Stoakes (ARM) > Cc: David Hildenbrand (Arm) > Cc: Miaohe Lin > Signed-off-by: Xie Yuanbin Acked-by: Miaohe Lin Thanks. .