linux-4.4.1/PTRS_PER_PTE(x86)

参照元†

• linux-4.4.1/PTRS_PER_PTE

説明†

• パス: 複数あり
  • CONFIG_X86_32 有効、CONFIG_X86_PAE 有効: linux-4.4.1/arch/x86/include/asm/pgtable-3level_types.h
  • CONFIG_X86_32 有効、CONFIG_X86_PAE 無効: linux-4.4.1/arch/x86/include/asm/pgtable-2level_types.h
  • CONFIG_X86_32 無効: linux-4.4.1/arch/x86/include/asm/pgtable_64_types.h
  • linux-4.4.1/CONFIG_X86_32
  • linux-4.4.1/CONFIG_X86_PAE

• FIXME: これは何？
  • 説明

参考†

CONFIG による include の分岐は下記の通り。

- arch/x86/include/asm/pgtable.h
  - CONFIG_X86_32 有効
    arch/x86/include/asm/pgtable_32.h
    - arch/x86/include/asm/pgtable_32_types.h
      - CONFIG_X86_PAE 有効
        arch/x86/include/asm/pgtable-3level_types.h
      - CONFIG_X86_PAE 無効
        arch/x86/include/asm/pgtable-2level_types.h
  - CONFIG_X86_32 無効
    arch/x86/asm/pgtable_64.h
    - arch/x86/asm/pgtable_64_types.h

実装†

CONFIG_X86_32 有効、CONFIG_X86_PAE 有効: arch/x86/include/asm/pgtable-3level_types.h†

/*
 * entries per page directory level
 */
#define PTRS_PER_PTE    512

CONFIG_X86_32 有効、CONFIG_X86_PAE 無効: arch/x86/include/asm/pgtable-2level_types.h†

/*
 * the i386 is two-level, so we don't really have any
 * PMD directory physically.
 */

#define PTRS_PER_PTE    1024

CONFIG_X86_32 無効: arch/x86/include/asm/pgtable_64_types.h†

/*
 * entries per page directory level
 */
#define PTRS_PER_PTE    512

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