linux/arch/x86/mm
Yinghai Lu eceb3632ac x86, mm: Don't clear page table if range is ram
After we add code use buffer in BRK to pre-map buf for page table in
following patch:
	x86, mm: setup page table in top-down
it should be safe to remove early_memmap for page table accessing.
Instead we get panic with that.

It turns out that we clear the initial page table wrongly for next range
that is separated by holes.
And it only happens when we are trying to map ram range one by one.

We need to check if the range is ram before clearing page table.

We change the loop structure to remove the extra little loop and use
one loop only, and in that loop will caculate next at first, and check if
[addr,next) is covered by E820_RAM.

-v2: E820_RESERVED_KERN is treated as E820_RAM. EFI one change some E820_RAM
     to that, so next kernel by kexec will know that range is used already.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-20-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-11-17 11:59:17 -08:00
..
kmemcheck bug.h: add include of it to various implicit C users 2012-02-29 17:15:08 -05:00
amdtopology.c x86, NUMA: Enable CONFIG_AMD_NUMA on 32bit too 2011-05-02 17:24:48 +02:00
dump_pagetables.c x86, mm: Create symbolic index into address_markers array 2010-07-20 16:56:19 -07:00
extable.c x86, extable: Switch to relative exception table entries 2012-04-20 17:22:34 -07:00
fault.c readahead: fault retry breaks mmap file read random detection 2012-10-09 16:22:47 +09:00
gup.c thp: add compound tail page _mapcount when mapped 2011-12-09 07:50:28 -08:00
highmem_32.c highmem: kill all __kmap_atomic() 2012-03-20 21:48:30 +08:00
hugetlbpage.c mm: replace vma prio_tree with an interval tree 2012-10-09 16:22:39 +09:00
init_32.c x86, mm: Align start address to correct big page size 2012-11-17 11:59:15 -08:00
init_64.c x86, mm: Don't clear page table if range is ram 2012-11-17 11:59:17 -08:00
init.c x86, mm: Use big page size for small memory range 2012-11-17 11:59:16 -08:00
iomap_32.c mm: fix race in kunmap_atomic() 2010-10-27 18:03:05 -07:00
ioremap.c x86/mm: Fix some kernel-doc warnings 2012-06-11 10:54:45 +02:00
kmmio.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
Makefile memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones 2011-07-14 11:47:53 -07:00
memtest.c memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones 2011-07-14 11:47:53 -07:00
mmap.c x86: Fix mmap random address range 2011-12-05 17:07:23 +01:00
mmio-mod.c module_param: make bool parameters really bool (arch) 2012-01-13 09:32:18 +10:30
numa_32.c memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones 2011-07-14 11:47:53 -07:00
numa_64.c memblock, x86: Make free_all_memory_core_early() explicitly free lowmem only 2011-07-14 11:47:49 -07:00
numa_emulation.c x86: print physical addresses consistently with other parts of kernel 2012-05-29 16:22:21 -07:00
numa_internal.h x86, NUMA: Initialize and use remap allocator from setup_node_bootmem() 2011-05-02 14:18:54 +02:00
numa.c x86: print physical addresses consistently with other parts of kernel 2012-05-29 16:22:21 -07:00
pageattr-test.c x86: Convert vmalloc()+memset() to vzalloc() 2011-05-28 19:53:57 +02:00
pageattr.c x86, mm: use pfn_range_is_mapped() with CPA 2012-11-17 11:59:09 -08:00
pat_internal.h x86, pat: Fix memory leak in free_memtype 2010-05-26 11:26:04 -07:00
pat_rbtree.c rbtree: move augmented rbtree functionality to rbtree_augmented.h 2012-10-09 16:22:40 +09:00
pat.c mm, x86, pat: rework linear pfn-mmap tracking 2012-10-09 16:22:16 +09:00
pf_in.c x86: Eliminate various 'set but not used' warnings 2011-05-21 19:10:33 +02:00
pf_in.h
pgtable_32.c Disintegrate asm/system.h for X86 2012-03-28 18:11:12 +01:00
pgtable.c x86: Flush TLB if PGD entry is changed in i386 PAE mode 2011-03-18 11:44:01 +01:00
physaddr.c x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
physaddr.h x86: split __phys_addr out into separate file 2009-09-10 11:48:55 -07:00
setup_nx.c x86, cpu: Only CPU features determine NX capabilities 2010-11-10 15:43:15 -08:00
srat.c ACPI: Only count valid srat memory structures 2012-08-03 00:15:53 -04:00
testmmiotrace.c x86, kmmio/mmiotrace: Fix double free of kmmio_fault_pages 2010-06-18 11:30:09 +02:00
tlb.c x86: Distinguish TLB shootdown interrupts from other functions call interrupts 2012-09-27 22:52:34 -07:00