We can reduce the memory allocated at mem-map by flatmem. currently, the default memory-model in arm64 is sparse memory. The mem-map array is not freed in this scene. If the physical address is too long, it will reserved too much memory for the mem-map array. Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx> Signed-off-by: Fu Jun <oliver.fu@xxxxxxxxxxxxx> --- arch/arm64/Kconfig | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 4f43622..c18930d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -559,6 +559,9 @@ config ARCH_SPARSEMEM_ENABLE def_bool y select SPARSEMEM_VMEMMAP_ENABLE +config ARCH_FLATMEM_ENABLE + def_bool y + config ARCH_SPARSEMEM_DEFAULT def_bool ARCH_SPARSEMEM_ENABLE -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
