{"id":441510,"date":"2025-04-28T22:33:44","date_gmt":"2025-04-28T14:33:44","guid":{"rendered":"https:\/\/www.idc.net\/help\/?p=441510"},"modified":"2025-04-28T22:33:44","modified_gmt":"2025-04-28T14:33:44","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3-rcu-%e9%94%81%ef%bc%9alinux-%e5%86%85%e6%a0%b8%e9%ab%98%e6%95%88%e5%b9%b6%e5%8f%91%e7%9a%84%e5%85%b3%e9%94%ae%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/441510\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3 RCU \u9501\uff1aLinux \u5185\u6838\u9ad8\u6548\u5e76\u53d1\u7684\u5173\u952e\u6280\u672f"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5728 Linux 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\u7279\u522b\u9002\u5408\u90e8\u7f72\u5728\u8ffd\u6c42\u6781\u81f4\u6027\u80fd\u7684\u5e94\u7528\u573a\u666f\uff0c\u5982\u5927\u578b\u7f51\u7ad9\u3001\u91d1\u878d\u7cfb\u7edf\u53ca\u9ad8\u9891\u4ea4\u6613\u5e73\u53f0\uff0c\u5c24\u5176\u662f\u5728\u4f9d\u6258<strong>\u9999\u6e2f\u4e91\u670d\u52a1\u5668<\/strong>\u8fd0\u884c\u7684\u4e1a\u52a1\u4e2d\u66f4\u80fd\u5145\u5206\u53d1\u6325\u4f18\u52bf\u3002<\/p>\n<h2>RCU \u9501\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u4e0e\u4f20\u7edf\u9501\u673a\u5236\u4e0d\u540c\uff0cRCU 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\u5178\u578b\u793a\u4f8b\uff08\u793a\u8303\u4ee3\u7801\uff09<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684RCU\u4f7f\u7528\u793a\u4f8b\uff0c\u7528\u4e8e\u4fdd\u62a4\u94fe\u8868\u7ed3\u6784\uff1a<\/p>\n<pre><code class=\"language-c\">#include &lt;linux\/module.h&gt;\r\n#include &lt;linux\/rcupdate.h&gt;\r\n\r\nstruct my_node {\r\n    int val;\r\n    struct rcu_head rcu;\r\n    struct list_head list;\r\n};\r\n\r\nLIST_HEAD(my_list);\r\n\r\n\/* \u6dfb\u52a0\u8282\u70b9 *\/\r\nvoid add_node(int val)\r\n{\r\n    struct my_node *new_node = kmalloc(sizeof(*new_node), GFP_KERNEL);\r\n    if (!new_node) return;\r\n\r\n    new_node-&gt;val = val;\r\n    INIT_LIST_HEAD(&amp;new_node-&gt;list);\r\n    list_add(&amp;new_node-&gt;list, &amp;my_list);\r\n}\r\n\r\n\/* \u5220\u9664\u8282\u70b9 *\/\r\nvoid del_node(int val)\r\n{\r\n    struct my_node *node, *tmp;\r\n    list_for_each_entry_safe(node, tmp, &amp;my_list, list) {\r\n        if (node-&gt;val == val) {\r\n            list_del_rcu(&amp;node-&gt;list);\r\n            call_rcu(&amp;node-&gt;rcu, kfree);\r\n        }\r\n    }\r\n}\r\n\r\n\/* \u904d\u5386\u8282\u70b9 *\/\r\nvoid traverse_list(void)\r\n{\r\n    struct my_node *node;\r\n    rcu_read_lock();\r\n    list_for_each_entry_rcu(node, &amp;my_list, list) {\r\n        printk(KERN_INFO \"Node: %d\\n\", node-&gt;val);\r\n    }\r\n    rcu_read_unlock();\r\n}\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u793a\u4f8b\u53ef\u4ee5\u770b\u5230\uff0c\u8bfb\u53d6\u64cd\u4f5c\u65e0\u9700\u52a0\u9501\uff0c\u5927\u5927\u63d0\u9ad8\u4e86\u5e76\u53d1\u8bbf\u95ee\u7684\u6548\u7387\u3002<\/p>\n<h2>\u7ed3\u8bed<\/h2>\n<p>RCU \u9501\u4ee5\u5176\u65e0\u9501\u8bfb\u3001\u5ef6\u8fdf\u66f4\u65b0\u7684\u8bbe\u8ba1\uff0c\u6210\u4e3a Linux \u5185\u6838\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u540c\u6b65\u5de5\u5177\u3002\u7279\u522b\u662f\u5728\u73b0\u4ee3\u6570\u636e\u4e2d\u5fc3\u3001\u91d1\u878d\u79d1\u6280\u3001\u5728\u7ebf\u6e38\u620f\u7b49\u5bf9\u9ad8\u5e76\u53d1\u5904\u7406\u6709\u6781\u9ad8\u8981\u6c42\u7684\u884c\u4e1a\uff0c\u5408\u7406\u8fd0\u7528RCU\u673a\u5236\u80fd\u591f\u663e\u8457\u63d0\u5347\u7cfb\u7edf\u6574\u4f53\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u4e3a\u9ad8\u5e76\u53d1\u3001\u9ad8\u8bbf\u95ee\u91cf\u7684\u5e94\u7528\u9009\u62e9\u670d\u52a1\u5668\uff0c\u6211\u4eec\u4e3a\u60a8\u63d0\u4f9b\u9ad8\u5e26\u5bbd\u3001\u4f4e\u5ef6\u8fdf\u7684<strong>\u9999\u6e2f\u670d\u52a1\u5668<\/strong>\u3001<strong>\u9999\u6e2fVPS<\/strong>\u4e0e<strong>\u9999\u6e2f\u4e91\u670d\u52a1\u5668<\/strong>\uff0c\u52a9\u529b\u4e1a\u52a1\u5feb\u901f\u7a33\u5b9a\u53d1\u5c55\u3002\u7acb\u5373\u8bbf\u95ee\u6211\u4eec<a href=\"https:\/\/idc.net\/\">\u5b98\u7f51<\/a>\u4e86\u89e3\u66f4\u591a\u8be6\u60c5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f15\u8a00 \u5728 Linux \u5185\u6838\u8fd9\u7247\u590d\u6742\u4e14\u5145\u6ee1\u6311\u6218\u7684\u9886\u57df\uff0c\u9ad8\u6548\u5904\u7406\u5e76\u53d1\u8bbf\u95ee\u4e00\u76f4\u662f\u6838\u5fc3\u5f00\u53d1\u7684\u91cd\u8981\u8bfe\u9898\u3002\u968f\u7740\u670d\u52a1\u5668\u89c4\u6a21\u65e5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-441510","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/441510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=441510"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/441510\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=441510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=441510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=441510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}