Background about the defect of the current bottom-up allocation style, take the following scenario: | unmovable node | movable node | | kaslr-kernel |subtree of pgtable for phy<->virt | Although kaslr-kernel can avoid to stain the movable node. But the pgtable can still stain the movable node. That is a probability problem, with low probability, but still exist. This patch tries to eliminate the probability. With the previous patch, at the point of init_mem_mapping(), memblock allocator can work with the knowledge of acpi memory hotmovable info, and avoid to stain the movable node. As a result, memory_map_bottom_up() is not needed any more. Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx> Cc: Len Brown <lenb@xxxxxxxxxx> Cc: linux-kernel@xxxxxxxxxxxxxxx Pingfan Liu (4): acpi: change the topo of acpi_table_upgrade() x86/setup: parse acpi to get hotplug info before init_mem_mapping() x86/mm: set allowed range for memblock allocator x86/mm: remove bottom-up allocation style for x86_64 arch/arm64/kernel/setup.c | 2 +- arch/x86/kernel/setup.c | 17 ++++- arch/x86/mm/init.c | 154 +++++++--------------------------------------- arch/x86/mm/init_32.c | 123 ++++++++++++++++++++++++++++++++++++ arch/x86/mm/mm_internal.h | 7 +++ drivers/acpi/tables.c | 4 +- include/linux/acpi.h | 5 +- 7 files changed, 172 insertions(+), 140 deletions(-) -- 2.7.4