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From: Yinghai Lu <yinghai <at> kernel.org>
Subject: [PATCH v7 00/46] x86, mm: map ram from top-down with BRK and memblock.
Newsgroups: gmane.linux.kernel
Date: Monday 12th November 2012 21:17:56 UTC (over 3 years ago)
rebase patchset together tip/x86/mm2 on top of linus v3.7-rc4

so this one include patchset : x86, mm: init_memory_mapping cleanup
in tip/x86/mm2
Current kernel init memory mapping between [0, TOML) and [4G, TOMH)
Some AMD systems have mem hole between 4G and TOMH, around 1T.
According to HPA, we should only mapping ram range.
1. Seperate calculate_table_space_size and find_early_page_table out with
2. For all ranges, will allocate page table one time
3. init mapping for ram range one by one.

pre mapping page table patcheset includes:
1. use brk to mapping first PMD_SIZE range under end of ram.
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.
5. remove workaround in xen to mark page RO.

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.
v4: add mapping_mark_page_ro to fix xen, also move pgt_buf_* to init.c
    and merge alloc_low_page(), and for 32bit need to add alloc_low_pages
    to fix 32bit kmap setting.
v5: remove mark_page_ro workaround  and add another 5 cleanup patches.
v6: rebase on v3.7-rc4 and add 4 cleanup patches.
v7: fix max_low_pfn_mapped for xen domu memmap that does not have hole
under 4g
    add pfn_range_is_mapped() calling for left over.

could be found at:

4d02fa2: x86, mm: Let "memmap=" take more entries one time
69c9485: mm: Kill NO_BOOTMEM version free_all_bootmem_node()
27a6151: sparc, mm: Remove calling of free_all_bootmem_node()
60d9772: x86, mm: kill numa_64.h
37c4eb8: x86, mm: kill numa_free_all_bootmem()
96e6c74: x86, mm: Use clamp_t() in init_range_memory_mapping
714535a: x86, mm: Move after_bootmem to mm_internel.h
5b10dbc: x86, mm: Unifying after_bootmem for 32bit and 64bit
84c1df0: x86, mm: use limit_pfn for end pfn
1108331: x86, mm: use pfn instead of pos in split_mem_range
7c1bf23: x86, mm: use PFN_DOWN in split_mem_range()
3ba0781: x86, mm: use round_up/down in split_mem_range()
34fb23f: x86, mm: Add check before clear pte above max_low_pfn on 32bit
df4a7d9: x86, mm: Move function declaration into mm_internal.h
c9b0822: x86, mm: change low/hignmem_pfn_init to static on 32bit
0467f80: x86, mm: Move init_gbpages() out of setup.c
28170b7: x86, mm: Move back pgt_buf_* to mm/init.c
b678b7c: x86, mm: only call early_ioremap_page_table_range_init() once
c31ef78: x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages
ef4d350: x86, mm: Add alloc_low_pages(num)
ceaa6ce: x86, mm, Xen: Remove mapping_pagetable_reserve()
8782e42: x86, mm: Move min_pfn_mapped back to mm/init.c
fd3fb05: x86, mm: Merge alloc_low_page between 64bit and 32bit
2c0d92c: x86, mm: Remove parameter in alloc_low_page for 64bit
2a0c505: x86, mm: Remove early_memremap workaround for page table accessing
on 64bit
e14b94f: x86, mm: setup page table in top-down
6db7bfb: x86, mm: Break down init_all_memory_mapping
2f799be: x86, mm: Don't clear page table if range is ram
686f1c4: x86, mm: Use big page size for small memory range
a473cf6: x86, mm: Align start address to correct big page size
114b025: x86, mm: relocate initrd under all mem for 64bit
bb3c507: x86, mm: Only direct map addresses that are marked as E820_RAM
7d59f08: x86, mm: use pfn_range_is_mapped() with reserve_initrd
2d2a11e: x86, mm: use pfn_range_is_mapped() with gart
e108072: x86, mm: use pfn_range_is_mapped() with CPA
4894260: x86, mm: Fixup code testing if a pfn is direct mapped
b0771c3: x86, mm: if kernel .text .data .bss are not marked as E820_RAM,
complain and fix
3159e6b: x86, mm: Set memblock initial limit to 1M
593cf88: x86, mm: Separate out calculate_table_space_size()
fba94e2: x86, mm: Find early page table buffer together
e1585d2: x86, mm: Change find_early_table_space() paramters
6a93a89: x86, mm: Revert back good_end setting for 64bit
306c44a: x86, mm: Move init_memory_mapping calling out of setup.c
fb40d13: x86, mm: Move down find_early_table_space()
e748645: x86, mm: Split out split_mem_range from init_memory_mapping
e419542: x86, mm: Add global page_size_mask and probe one time only

 arch/sparc/mm/init_64.c              |   24 +-
 arch/x86/include/asm/init.h          |   21 +--
 arch/x86/include/asm/numa.h          |    2 -
 arch/x86/include/asm/numa_64.h       |    6 -
 arch/x86/include/asm/page_types.h    |    2 +
 arch/x86/include/asm/pgtable.h       |    2 +
 arch/x86/include/asm/pgtable_types.h |    1 -
 arch/x86/include/asm/x86_init.h      |   12 -
 arch/x86/kernel/acpi/boot.c          |    1 -
 arch/x86/kernel/amd_gart_64.c        |    5 +-
 arch/x86/kernel/cpu/amd.c            |    9 +-
 arch/x86/kernel/cpu/intel.c          |    1 -
 arch/x86/kernel/e820.c               |   16 ++-
 arch/x86/kernel/setup.c              |  121 ++++------
 arch/x86/kernel/x86_init.c           |    4 -
 arch/x86/mm/init.c                   |  446
 arch/x86/mm/init_32.c                |  106 +++++---
 arch/x86/mm/init_64.c                |  140 ++++-------
 arch/x86/mm/mm_internal.h            |   19 ++
 arch/x86/mm/numa_64.c                |   13 -
 arch/x86/mm/pageattr.c               |   16 +-
 arch/x86/platform/efi/efi.c          |    7 +-
 arch/x86/xen/mmu.c                   |   28 ---
 include/linux/mm.h                   |    1 -
 mm/nobootmem.c                       |   14 -
 25 files changed, 513 insertions(+), 504 deletions(-)
 delete mode 100644 arch/x86/include/asm/numa_64.h
 create mode 100644 arch/x86/mm/mm_internal.h

CD: 4ms