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 <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Dave Hansen <dave.han...@linux.intel.com>
Cc: Andy Lutomirski <l...@kernel.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: "Rafael J. Wysocki" <r...@rjwysocki.net>
Cc: Len Brown <l...@kernel.org>
Cc: linux-kernel@vger.kernel.org
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
