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authorYanteng Si <siyanteng01@gmail.com>2022-03-28 11:59:50 +0200
committerJonathan Corbet <corbet@lwn.net>2022-04-05 18:08:05 +0200
commitdc742b017439b18847745c1095e0ee997d586d85 (patch)
tree9c0bb8060dc5c1a9a6b215b30c73386548bb5498
parentdocs/zh_CN: add vm page_owner translation (diff)
downloadlinux-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>
-rw-r--r--Documentation/translations/zh_CN/vm/index.rst2
-rw-r--r--Documentation/translations/zh_CN/vm/page_table_check.rst56
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。