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b=CwgT9Ht8lK1bV896H5TxIIa4Uv24P73RCNDkYiVPOxMuIUFBsTCWTDBROcJyUXVtq pLw/IXLDJ7ix7hRvcFtXGewgaTSOrenm/XTeKqxxoP6pydlZgdKiHz97Z7cKMcwJt2 ig4s3f8vvXRY8Gck3HZX1PpfCbqnEDXpCqXNA6QDT5yvWUFD606fJaKlJhrpvol7Mj F9LEeMe43BhiHvvs3qoIr6pIDqMnsPN7uLErhszG6cfXKEw43cQOiprF3L7O8E2jCJ hCP/+6BrtxZMziR1vRALtdz/8mwMFBE32p81ukzgEkBRwHfymvdfgT2r2vcXUYkZOd AJrGxUY78Y64Q== Message-ID: <6527de10-5140-47d8-9c05-4df3c9868ec0@kernel.org> Date: Thu, 13 Aug 2026 21:35:45 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] mm/Kconfig: make MEMORY_FAILURE select MIGRATION To: Xie Yuanbin , akpm@linux-foundation.org, linmiaohe@huawei.com, ziy@nvidia.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, ying.huang@linux.alibaba.com, apopple@nvidia.com, nao.horiguchi@gmail.com, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, gourry@gourry.net, tony.luck@intel.com, bp@alien8.de Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, liaohua4@huawei.com, lilinjie8@huawei.com References: <20260813134916.292733-1-xieyuanbin1@huawei.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: C6113120003 X-Stat-Signature: 1hun6cuwhmn3b6anmhyt3op3w996eqts X-Rspam-User: X-Rspamd-Server: rspam11 X-HE-Tag: 1786649755-959039 X-HE-Meta: U2FsdGVkX1/yqBqrpNCICvD+8B5z7evxmw24ZfpGHUAvTqCMW6hRb0DLbsxSsMIJNVszMmdOD3B95kd9Cpfn/0Tn+9gPlmvc7ZIyG0yc+N89rj6M8CgjIZPAISuBPSL0zMkWY6iLFEpu/ZzqJpYZLyl7qYpc9/TLqGVdChFkDfS8BPq6Y/mqv2ihHZZw3x0J8oBfnSZ/gZY4lYYER5jDp28xAN7aCBRZrRVm5hMV86IuzKSjbg3n4Ws5wttQvDf14VPcSJsD99mhWRJny2JmzhwjGxz1X1xUUTwzJrf5MpRxEqmaMqN7H7U4DBQ/PNbRm5mY6O8R5Dpn4bBL/VYlXYqIuQlf+/Bzg44dlHKROAZHkLIJZ8Ieq4p5sayiKQMkZzXVhebTh/nemQSw9j2lDcetIZfyckXF7mfklK1IvGrXYR54VtjMTbqdrhCcOGT6G0OJaR1FvpqKaoJaJXCBCFeHiogWlYN5hXW8ZAIGgdRh3NZkpTsWlwsbgZu/9Z/fOFQeFXZD3FodvzN7kzT2QMUxHG+dXB2VVYF2oDtWuIBUE6/51K+M1dNhzgMkC+yVUeiazhi5L/9erNAfNLPM7Xeyac6f1Rh940hJhfxdJGxVldq8Tcg/5BZpUzBAwMSqqXFyxKVgxe16kDZjTphVr59HXv1XvAsszrOygQXtcWNsBWxNjr7f7BTofEAaCO6BZv8J0o7ANw1Bb+nHnM/hSsbupjzYQwG3xmvEOEIZJuMTi8dpFCaaOwBbyEb0w16R+Cc41GysWxVH1NDrjxQ0KN5o8f+4RPc6TAZNp6viza8wdQKVB25YmFIjjFIEXnOlIDH3JXBJfAcnElAIDcfLuXaj/mOBCBvtfx96paltJ55bbtTeRnB+Pa0ox0299VWT332lSBEDJ0r7TRNXsQGI7f0n7YAcmB9VkaNAz7byXBFZ1SiRYAR5L+qHVOiqivx1+bEhmHUMLLMD38CrXQl mDYFYD1L mCI1acFd2j9sSCXTJRV//GKeEEK0ny6qto3XndUPNUHZDgGlsDZF9dUeW/F3YrGC9CAGn57bGmBG8hIKGyCPAZbjPjyAt5xiB7pqJO/t+r4+as7BXkLh2YDc2Qa9/00qZko4bUqZwtKpdY3rYLoI55q/6h2ZSowKM8vxykUaRFG4oqW6jCmn3o+0dp3pVP4x7ooJ75bAFuJ5eW8o3xO37Qlyqt1hWgJN1Mn5zhOy/z8HP7i533rYyBaBc5GUAh7kFoiiGyzmYt/LbmUKmPfhDiUkOeSPa5iLGk+YmmSSgMRAXd8QdE5irf/voNVOuQ9pIWxLSR5L5cHvSzE126j4XtbvQDvV5M6OQYObWQ1uTxoXrqMR5q+f3U/WeQtqZcvkM05WD7aAirtduHJPVTyBAGaud2PpZHf4xKIQJPVr868cYyho= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/13/26 15:49, 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: David Hildenbrand (Arm) -- Cheers, David