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| author | Xie Yuanbin <xieyuanbin1@huawei.com> | 2026-08-13 21:49:16 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-08-20 18:24:47 -0700 |
| commit | ce3c25da7b9cedb2c111c3867f42b2dbb77334b7 (patch) | |
| tree | 286ce38b3662fd551c547fbca3bae9888871b56b /mm | |
| parent | 0f90a0d0c7c2893e1d6878b5de99dfa4e8f0c12d (diff) | |
| download | linux-next-ce3c25da7b9cedb2c111c3867f42b2dbb77334b7.tar.gz linux-next-ce3c25da7b9cedb2c111c3867f42b2dbb77334b7.zip | |
mm/Kconfig: make MEMORY_FAILURE select MIGRATION
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.
Link: https://lore.kernel.org/20260813134916.292733-1-xieyuanbin1@huawei.com
Signed-off-by: Xie Yuanbin <xieyuanbin1@huawei.com>
Suggested-by: Mike Rapoport <rppt@kernel.org>
Reviewed-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>
Cc: Byungchul Park <byungchul@sk.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Gregory Price <gourry@gourry.net>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: liaohua <liaohua4@huawei.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Yuanbin Xie <xieyuanbin1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 8a24c130d008..604c58199acb 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -767,6 +767,7 @@ config MEMORY_FAILURE depends on ARCH_SUPPORTS_MEMORY_FAILURE bool "Enable recovery from hardware memory errors" select INTERVAL_TREE + select MIGRATION help Enables code to recover from some memory failures on systems with MCA recovery. This allows a system to continue running |