Re: [PATCH v8 00/46] x86, mm: map ram from top-down with BRK and memblock.

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Fri, Nov 16, 2012 at 07:38:37PM -0800, Yinghai Lu wrote:
> rebase patchset together tip/x86/mm2 on top of linus v3.7-rc4
> 

Pardon me for taking so long to respond. Right after you posted it I had
a mini-conference and then vacation and I am just now unburrying myself
from email avalanche.

I will take a look at them tomorrow and review them.


> 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
>    init_memory_mapping.
> 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.
> v8: updated some changelog and add some Acks from Stefano.
>     Put v8 on every patch's subject, so hpa would not check old version.
>     hope could catch window for v3.8
> 
> could be found at:
>         git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-x86-mm
> 
> Jacob Shin (3):
>   x86, mm: if kernel .text .data .bss are not marked as E820_RAM, complain and fix
>   x86, mm: Fixup code testing if a pfn is direct mapped
>   x86, mm: Only direct map addresses that are marked as E820_RAM
> 
> Stefano Stabellini (1):
>   x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages
> 
> Yinghai Lu (42):
>   x86, mm: Add global page_size_mask and probe one time only
>   x86, mm: Split out split_mem_range from init_memory_mapping
>   x86, mm: Move down find_early_table_space()
>   x86, mm: Move init_memory_mapping calling out of setup.c
>   x86, mm: Revert back good_end setting for 64bit
>   x86, mm: Change find_early_table_space() paramters
>   x86, mm: Find early page table buffer together
>   x86, mm: Separate out calculate_table_space_size()
>   x86, mm: Set memblock initial limit to 1M
>   x86, mm: use pfn_range_is_mapped() with CPA
>   x86, mm: use pfn_range_is_mapped() with gart
>   x86, mm: use pfn_range_is_mapped() with reserve_initrd
>   x86, mm: relocate initrd under all mem for 64bit
>   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 range is ram
>   x86, mm: Break down init_all_memory_mapping
>   x86, mm: setup page table in top-down
>   x86, mm: Remove early_memremap workaround for page table accessing on 64bit
>   x86, mm: Remove parameter in alloc_low_page for 64bit
>   x86, mm: Merge alloc_low_page between 64bit and 32bit
>   x86, mm: Move min_pfn_mapped back to mm/init.c
>   x86, mm, Xen: Remove mapping_pagetable_reserve()
>   x86, mm: Add alloc_low_pages(num)
>   x86, mm: only call early_ioremap_page_table_range_init() once
>   x86, mm: Move back pgt_buf_* to mm/init.c
>   x86, mm: Move init_gbpages() out of setup.c
>   x86, mm: change low/hignmem_pfn_init to static on 32bit
>   x86, mm: Move function declaration into mm_internal.h
>   x86, mm: Add check before clear pte above max_low_pfn on 32bit
>   x86, mm: use round_up/down in split_mem_range()
>   x86, mm: use PFN_DOWN in split_mem_range()
>   x86, mm: use pfn instead of pos in split_mem_range
>   x86, mm: use limit_pfn for end pfn
>   x86, mm: Unifying after_bootmem for 32bit and 64bit
>   x86, mm: Move after_bootmem to mm_internel.h
>   x86, mm: Use clamp_t() in init_range_memory_mapping
>   x86, mm: kill numa_free_all_bootmem()
>   x86, mm: kill numa_64.h
>   sparc, mm: Remove calling of free_all_bootmem_node()
>   mm: Kill NO_BOOTMEM version free_all_bootmem_node()
>   x86, mm: Let "memmap=" take more entries one time
> 
>  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                   |  449 ++++++++++++++++++++++------------
>  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, 516 insertions(+), 504 deletions(-)
>  delete mode 100644 arch/x86/include/asm/numa_64.h
>  create mode 100644 arch/x86/mm/mm_internal.h
> 
> -- 
> 1.7.7