This patch series update memmap on memory feature to fall back to memmap allocation outside the memory block if the alignment rules are not met. This makes the feature more useful on architectures like ppc64 where alignment rules are different with 64K page size. This patch series is dependent on dax vmemmap optimization series posted here https://lore.kernel.org/linux-mm/20230616110826.344417-1-aneesh.kumar@xxxxxxxxxxxxx Aneesh Kumar K.V (5): mm/hotplug: Embed vmem_altmap details in memory block mm/hotplug: Allow architecture override for memmap on memory feature mm/hotplug: Simplify the handling of MHP_MEMMAP_ON_MEMORY flag mm/hotplug: Simplify ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE kconfig powerpc/book3s64/memhotplug: Enable memmap on memory for radix arch/arm64/Kconfig | 4 +- arch/arm64/mm/mmu.c | 5 + arch/powerpc/Kconfig | 1 + arch/powerpc/mm/book3s64/radix_pgtable.c | 28 ++++++ .../platforms/pseries/hotplug-memory.c | 4 +- arch/x86/Kconfig | 4 +- arch/x86/mm/init_64.c | 6 ++ drivers/acpi/acpi_memhotplug.c | 3 +- drivers/base/memory.c | 28 ++++-- include/linux/memory.h | 25 +++-- include/linux/memory_hotplug.h | 17 +++- include/linux/memremap.h | 18 +--- mm/Kconfig | 3 + mm/memory_hotplug.c | 95 +++++++++---------- 14 files changed, 151 insertions(+), 90 deletions(-) -- 2.41.0
