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author | Yanteng Si <siyanteng01@gmail.com> | 2022-03-28 11:59:50 +0200 |
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committer | Jonathan Corbet <corbet@lwn.net> | 2022-04-05 18:08:05 +0200 |
commit | dc742b017439b18847745c1095e0ee997d586d85 (patch) | |
tree | 9c0bb8060dc5c1a9a6b215b30c73386548bb5498 /Documentation/translations | |
parent | docs/zh_CN: add vm page_owner translation (diff) | |
download | linux-dc742b017439b18847745c1095e0ee997d586d85.tar.xz linux-dc742b017439b18847745c1095e0ee997d586d85.zip |
docs/zh_CN: add vm page_table_check translation
Translate .../vm/page_table_check.rst into Chinese.
Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/translations')
-rw-r--r-- | Documentation/translations/zh_CN/vm/index.rst | 2 | ||||
-rw-r--r-- | Documentation/translations/zh_CN/vm/page_table_check.rst | 56 |
2 files changed, 57 insertions, 1 deletions
diff --git a/Documentation/translations/zh_CN/vm/index.rst b/Documentation/translations/zh_CN/vm/index.rst index aa983d023045..a2dea8b618ad 100644 --- a/Documentation/translations/zh_CN/vm/index.rst +++ b/Documentation/translations/zh_CN/vm/index.rst @@ -34,6 +34,7 @@ TODO:待引用文档集被翻译完毕后请及时修改此处) overcommit-accounting page_frags page_owner + page_table_check TODOLIST: * arch_pgtable_helpers @@ -42,7 +43,6 @@ TODOLIST: * hugetlbfs_reserv * numa * page_migration -* page_table_check * remap_file_pages * slub * split_page_table_lock diff --git a/Documentation/translations/zh_CN/vm/page_table_check.rst b/Documentation/translations/zh_CN/vm/page_table_check.rst new file mode 100644 index 000000000000..a29fc1b360e6 --- /dev/null +++ b/Documentation/translations/zh_CN/vm/page_table_check.rst @@ -0,0 +1,56 @@ +.. SPDX-License-Identifier: GPL-2.0 + +:Original: Documentation/vm/page_table_check.rst + +:翻译: + + 司延腾 Yanteng Si <siyanteng@loongson.cn> + +:校译: + + +======== +页表检查 +======== + +概述 +==== + +页表检查允许通过确保防止某些类型的内存损坏来强化内核。 + +当新的页面可以从用户空间访问时,页表检查通过将它们的页表项(PTEs PMD等)添加到页表中来执行额外 +的验证。 + +在检测到损坏的情况下,内核会被崩溃。页表检查有一个小的性能和内存开销。因此,它在默认情况下是禁用 +的,但是在额外的加固超过性能成本的系统上,可以选择启用。另外,由于页表检查是同步的,它可以帮助调 +试双映射内存损坏问题,在错误的映射发生时崩溃内核,而不是在内存损坏错误发生后内核崩溃。 + +双重映射检测逻辑 +================ + ++-------------------+-------------------+-------------------+------------------+ +| Current Mapping | New mapping | Permissions | Rule | ++===================+===================+===================+==================+ +| Anonymous | Anonymous | Read | Allow | ++-------------------+-------------------+-------------------+------------------+ +| Anonymous | Anonymous | Read / Write | Prohibit | ++-------------------+-------------------+-------------------+------------------+ +| Anonymous | Named | Any | Prohibit | ++-------------------+-------------------+-------------------+------------------+ +| Named | Anonymous | Any | Prohibit | ++-------------------+-------------------+-------------------+------------------+ +| Named | Named | Any | Allow | ++-------------------+-------------------+-------------------+------------------+ + +启用页表检查 +============ + +用以下方法构建内核: + +- PAGE_TABLE_CHECK=y + 注意,它只能在ARCH_SUPPORTS_PAGE_TABLE_CHECK可用的平台上启用。 + +- 使用 "page_table_check=on" 内核参数启动。 + +可以选择用PAGE_TABLE_CHECK_ENFORCED来构建内核,以便在没有额外的内核参数的情况下获得页表 +支持。 |