docs/zh_CN: Update the translation of page_owner to 6.0-rc7

1)Update to commit 8f0efa81df ("mm/page_owner.c: add
llseek for page_owner")

2)Translate some words into Chinese.

Signed-off-by: Yanteng Si <siyanteng@loongson.cn>
Reviewed-by: Alex Shi <alexs@kernel.org>
Link: https://lore.kernel.org/r/52bc8df87618af951b34759487f05775416cb4d4.1664360331.git.siyanteng@loongson.cn
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/translations/zh_CN/mm/page_owner.rst

@@ -74,15 +74,19 @@ page owner在默认情况下是禁用的。所以，如果你想使用它，你
 	cat /sys/kernel/debug/page_owner > page_owner_full.txt
 	./page_owner_sort page_owner_full.txt sorted_page_owner.txt
 
-   ``page_owner_full.txt`` 的一般输出情况如下(输出信息无翻译价值)::
+   ``page_owner_full.txt`` 的一般输出情况如下::
 
 	Page allocated via order XXX, ...
 	PFN XXX ...
-	// Detailed stack
+	// 栈详情
 
 	Page allocated via order XXX, ...
 	PFN XXX ...
-	// Detailed stack
+	// 栈详情
+    默认情况下，它将以一个给定的pfn开始，做完整的pfn转储，且page_owner支持fseek。
+
+    FILE *fp = fopen("/sys/kernel/debug/page_owner", "r");
+    fseek(fp, pfn_start, SEEK_SET);
 
    ``page_owner_sort`` 工具忽略了 ``PFN`` 行，将剩余的行放在buf中，使用regexp提
    取页序值，计算buf的次数和页数，最后根据参数进行排序。