[PATCH -v3 0/7] x86: Use BRK to pre mapping page table to make xen happy

[Yinghai Lu]

on top of tip/x86/mm2, but please zap last patch in that branch.

1. use brk to mapping first PMD_SIZE range.
2. top down to initialize page table range by range.
3. get rid of calculate page table, and find_early_page_table.
4. remove early_ioremap in page table accessing.

v2: changes, update xen interface about pagetable_reserve, so not
   use pgt_buf_* in xen code directly.
v3: use range top-down to initialize page table, so will not use
   calculating/find early table anymore.
   also reorder the patches sequence.

could be found at:
        git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-x86-mm

later we could get rid of workaround about xen_mapping_pagetable_reserve, that
could kill another 50 lines codes. --- will do that later because x86/mm2 is
not updated to linus/master yet. If we do that now, will have merge conflicts.

Thanks

Yinghai Lu

Yinghai Lu (7):
  x86, mm: align start address to correct big page size
  x86, mm: Use big page size for small memory range
  x86, mm: Don't clear page table if next range is ram
  x86, mm: only keep initial mapping for ram
  x86, mm: Break down init_all_memory_mapping
  x86, mm: setup page table from top-down
  x86, mm: Remove early_memremap workaround for page table accessing

 arch/x86/include/asm/page_types.h |    1 +
 arch/x86/include/asm/pgtable.h    |    1 +
 arch/x86/kernel/setup.c           |    3 +
 arch/x86/mm/init.c                |  251 ++++++++++++------------------------
 arch/x86/mm/init_32.c             |   18 +++-
 arch/x86/mm/init_64.c             |  100 ++++++---------
 6 files changed, 144 insertions(+), 230 deletions(-)

-- 
1.7.7

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