[PATCH -v5 00/19] x86: Use BRK to pre mapping page table to make xen happy

From: Yinghai Lu
Date: Thu Oct 18 2012 - 16:52:54 EST

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

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.
Add another 5 cleanup patches.

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

Yinghai Lu (19):
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: only keep initial mapping for 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_pagatable_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: Let "memmap=" take more entries one time
x86, mm: Add check before clear pte above max_low_pfn on 32bit

arch/x86/include/asm/init.h | 20 +--
arch/x86/include/asm/pgtable.h | 1 +
arch/x86/include/asm/pgtable_types.h | 1 -
arch/x86/include/asm/x86_init.h | 12 --
arch/x86/kernel/e820.c | 16 ++-
arch/x86/kernel/setup.c | 17 +--
arch/x86/kernel/x86_init.c | 4 -
arch/x86/mm/init.c | 355 +++++++++++++++++-----------------
arch/x86/mm/init_32.c | 85 ++++++---
arch/x86/mm/init_64.c | 119 +++--------
arch/x86/mm/mm_internal.h | 17 ++
arch/x86/xen/mmu.c | 28 ---
12 files changed, 308 insertions(+), 367 deletions(-)
create mode 100644 arch/x86/mm/mm_internal.h


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