{"id":17689,"date":"2024-11-18T13:21:17","date_gmt":"2024-11-18T05:21:17","guid":{"rendered":"https:\/\/fwq.ai\/blog\/17689\/"},"modified":"2024-11-18T13:21:17","modified_gmt":"2024-11-18T05:21:17","slug":"linux%e5%86%85%e6%a0%b8%e6%ba%90%e4%bb%a3%e7%a0%81%e5%ad%98%e6%94%be%e4%bd%8d%e7%bd%ae%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/17689\/","title":{"rendered":"Linux\u5185\u6838\u6e90\u4ee3\u7801\u5b58\u653e\u4f4d\u7f6e\u8be6\u89e3"},"content":{"rendered":"

\"Linux\u5185\u6838\u6e90\u4ee3\u7801\u5b58\u653e\u4f4d\u7f6e\u8be6\u89e3\u63d2\u56fe\"<\/p>\n

Linux\u5185\u6838\u6e90\u4ee3\u7801\u5b58\u653e\u4f4d\u7f6e\u8be6\u89e3<\/p>\n

Linux\u5185\u6838\u6e90\u4ee3\u7801\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u5b83\u5305\u542b\u4e86\u64cd\u4f5c\u7cfb\u7edf\u7684\u5404\u79cd\u529f\u80fd\u7684\u5b9e\u73b0\u4ee3\u7801\u3002\u8981\u4e86\u89e3Linux\u5185\u6838\u6e90\u4ee3\u7801\u7684\u5b58\u653e\u4f4d\u7f6e\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u4e86\u89e3Linux\u5185\u6838\u7684\u7ec4\u7ec7\u7ed3\u6784\u3002<\/p>\n

Linux\u5185\u6838\u6e90\u4ee3\u7801\u901a\u5e38\u5b58\u653e\u5728 \/usr\/src\/ \u6216 \/usr\/src\/linux- \u76ee\u5f55\u4e0b\u3002\u5728\u8fd9\u4e2a\u76ee\u5f55\u4e2d\uff0c\u5305\u542b\u4e86\u4e30\u5bcc\u7684\u5b50\u76ee\u5f55\u548c\u5404\u79cd\u6e90\u4ee3\u7801\u6587\u4ef6\u3002 <\/p>\n

    \n
  1. arch \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u4e0b\u5b58\u653e\u4e86\u4e0e\u786c\u4ef6\u67b6\u6784\u76f8\u5173\u7684\u4ee3\u7801\u3002\u6bcf\u4e2a\u652f\u6301\u7684\u786c\u4ef6\u67b6\u6784\u90fd\u4f1a\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u5b50\u76ee\u5f55\uff0c\u6bd4\u5982arch\/x86\u7528\u4e8e\u5b58\u653ex86\u67b6\u6784\u7684\u4ee3\u7801\u3002<\/li>\n
  2. block \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5b58\u653e\u4e86\u5757\u8bbe\u5907\u9a71\u52a8\u76f8\u5173\u7684\u4ee3\u7801\uff0c\u8d1f\u8d23\u7ba1\u7406\u5757\u8bbe\u5907\u7684\u8bfb\u5199\u64cd\u4f5c\u3002<\/li>\n
  3. fs \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5305\u542b\u4e86\u6587\u4ef6\u7cfb\u7edf\u76f8\u5173\u7684\u4ee3\u7801\uff0c\u5305\u62ec\u5404\u79cd\u6587\u4ef6\u7cfb\u7edf\u7684\u5b9e\u73b0\uff0c\u6bd4\u5982Ext4\u3001XFS\u3001Btrfs\u7b49\u3002<\/li>\n
  4. include \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5305\u542b\u4e86\u5404\u79cd\u5934\u6587\u4ef6\uff0c\u5b9a\u4e49\u4e86\u5185\u6838\u4e2d\u4f7f\u7528\u7684\u6570\u636e\u7ed3\u6784\u3001\u5b8f\u5b9a\u4e49\u7b49\u3002<\/li>\n
  5. kernel \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5305\u542b\u4e86\u5185\u6838\u7684\u6838\u5fc3\u4ee3\u7801\uff0c\u4f8b\u5982\u8fdb\u7a0b\u7ba1\u7406\u3001\u5185\u5b58\u7ba1\u7406\u3001\u8c03\u5ea6\u5668\u7b49\u3002<\/li>\n<\/ol>\n

    \u9664\u4e86\u4e0a\u8ff0\u76ee\u5f55\u5916\uff0c\u8fd8\u6709\u5f88\u591a\u5176\u4ed6\u76ee\u5f55\u548c\u6587\u4ef6\uff0c\u5982drivers\u7528\u4e8e\u5b58\u653e\u8bbe\u5907\u9a71\u52a8\u4ee3\u7801\uff0cinit\u7528\u4e8e\u5b58\u653e\u5185\u6838\u521d\u59cb\u5316\u76f8\u5173\u7684\u4ee3\u7801\uff0cmm\u7528\u4e8e\u5b58\u653e\u5185\u5b58\u7ba1\u7406\u76f8\u5173\u7684\u4ee3\u7801\u7b49\u7b49\u3002<\/p>\n

    \u4e0b\u9762\uff0c\u6211\u4eec\u4ee5\u67e5\u770b\u8fdb\u7a0b\u7ba1\u7406\u76f8\u5173\u7684\u4ee3\u7801\u4e3a\u4f8b\uff0c\u7ed9\u51fa\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n

    \u8fdb\u7a0b\u7ba1\u7406\u76f8\u5173\u7684\u4ee3\u7801\u4e00\u822c\u5b58\u653e\u5728 kernel \u76ee\u5f55\u4e0b\u7684 pid.c \u548c sched.c \u7b49\u6587\u4ef6\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n

    pid.c<\/strong>:<\/p>\n

    #include <linux>\n#include <linux>\n\nstruct pid *find_get_pid(pid_t nr)\n{\n    struct pid *pid;\n\n    rcu_read_lock();\n    pid = __find_get_pid(nr);\n    if (pid)\n        get_pid(pid);\n    rcu_read_unlock();\n\n    return pid;\n}<\/linux><\/linux><\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    sched.c<\/strong>:<\/p>\n
    #include <linux>\n#include <linux>\n\nvoid wake_up_process(struct task_struct *p)\n{\n    if (p-&gt;state == TASK_UNINTERRUPTIBLE) {\n        set_task_state(p, TASK_RUNNING);\n    }\n}<\/linux><\/linux><\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
    \u8fd9\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5728\u5185\u6838\u6e90\u4ee3\u7801\u4e2d\u5982\u4f55\u5b9e\u73b0\u5bfb\u627e\u548c\u5524\u9192\u8fdb\u7a0b\u7684\u529f\u80fd\u3002\u5f53\u7136\uff0c\u5b9e\u9645\u7684\u4ee3\u7801\u8981\u590d\u6742\u5f97\u591a\uff0c\u6d89\u53ca\u5230\u8bb8\u591a\u7ec6\u8282\u548c\u8fb9\u754c\u60c5\u51b5\u3002<\/p>\n
    \u603b\u4e4b\uff0cLinux\u5185\u6838\u6e90\u4ee3\u7801\u5b58\u653e\u4f4d\u7f6e\u8be6\u89e3\uff0c\u5e0c\u671b\u4e0a\u8ff0\u89e3\u91ca\u548c\u793a\u4f8b\u80fd\u591f\u5e2e\u52a9\u8bfb\u8005\u66f4\u597d\u5730\u7406\u89e3Linux\u5185\u6838\u7684\u7ec4\u7ec7\u7ed3\u6784\u548c\u4ee3\u7801\u5b58\u653e\u4f4d\u7f6e\u3002\u8981\u6df1\u5165\u4e86\u89e3\u5185\u6838\u6e90\u4ee3\u7801\uff0c\u9700\u8981\u4ed4\u7ec6\u7814\u7a76\u5177\u4f53\u7684\u76ee\u5f55\u548c\u6587\u4ef6\uff0c\u4ee5\u53ca\u5b83\u4eec\u4e4b\u95f4\u7684\u5173\u7cfb\u548c\u4ea4\u4e92\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662fLinux\u5185\u6838\u6e90\u4ee3\u7801\u5b58\u653e\u4f4d\u7f6e\u8be6\u89e3\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    Linux\u5185\u6838\u6e90\u4ee3\u7801\u5b58\u653e\u4f4d\u7f6e\u8be6\u89e3 Linux\u5185\u6838\u6e90\u4ee3\u7801\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u7684\u6838\u5fc3\u90e8\u5206\uff0c\u5b83\u5305\u542b\u4e86\u64cd\u4f5c\u7cfb\u7edf\u7684\u5404\u79cd\u529f\u80fd\u7684\u5b9e\u73b0\u4ee3\u7801\u3002\u8981\u4e86\u89e3Linux\u5185\u6838\u6e90\u4ee3\u7801\u7684\u5b58\u653e\u4f4d\u7f6e\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u4e86\u89e3Linux\u5185\u6838\u7684\u7ec4\u7ec7\u7ed3\u6784\u3002 Linux\u5185\u6838\u6e90\u4ee3\u7801\u901a\u5e38\u5b58\u653e\u5728 \/usr\/src\/ \u6216 \/usr\/src\/linux- \u76ee\u5f55\u4e0b\u3002\u5728\u8fd9\u4e2a\u76ee\u5f55\u4e2d\uff0c\u5305\u542b\u4e86\u4e30\u5bcc\u7684\u5b50\u76ee\u5f55\u548c\u5404\u79cd\u6e90\u4ee3\u7801\u6587\u4ef6\u3002 arch \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u4e0b\u5b58\u653e\u4e86\u4e0e\u786c\u4ef6\u67b6\u6784\u76f8\u5173\u7684\u4ee3\u7801\u3002\u6bcf\u4e2a\u652f\u6301\u7684\u786c\u4ef6\u67b6\u6784\u90fd\u4f1a\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u5b50\u76ee\u5f55\uff0c\u6bd4\u5982arch\/x86\u7528\u4e8e\u5b58\u653ex86\u67b6\u6784\u7684\u4ee3\u7801\u3002 block \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5b58\u653e\u4e86\u5757\u8bbe\u5907\u9a71\u52a8\u76f8\u5173\u7684\u4ee3\u7801\uff0c\u8d1f\u8d23\u7ba1\u7406\u5757\u8bbe\u5907\u7684\u8bfb\u5199\u64cd\u4f5c\u3002 fs \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5305\u542b\u4e86\u6587\u4ef6\u7cfb\u7edf\u76f8\u5173\u7684\u4ee3\u7801\uff0c\u5305\u62ec\u5404\u79cd\u6587\u4ef6\u7cfb\u7edf\u7684\u5b9e\u73b0\uff0c\u6bd4\u5982Ext4\u3001XFS\u3001Btrfs\u7b49\u3002 include \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5305\u542b\u4e86\u5404\u79cd\u5934\u6587\u4ef6\uff0c\u5b9a\u4e49\u4e86\u5185\u6838\u4e2d\u4f7f\u7528\u7684\u6570\u636e\u7ed3\u6784\u3001\u5b8f\u5b9a\u4e49\u7b49\u3002 kernel \u76ee\u5f55\uff1a\u8fd9\u4e2a\u76ee\u5f55\u5305\u542b\u4e86\u5185\u6838\u7684\u6838\u5fc3\u4ee3\u7801\uff0c\u4f8b\u5982\u8fdb\u7a0b\u7ba1\u7406\u3001\u5185\u5b58\u7ba1\u7406\u3001\u8c03\u5ea6\u5668\u7b49\u3002 \u9664\u4e86\u4e0a\u8ff0\u76ee\u5f55\u5916\uff0c\u8fd8\u6709\u5f88\u591a\u5176\u4ed6\u76ee\u5f55\u548c\u6587\u4ef6\uff0c\u5982drivers\u7528\u4e8e\u5b58\u653e\u8bbe\u5907\u9a71\u52a8\u4ee3\u7801\uff0cinit\u7528\u4e8e\u5b58\u653e\u5185\u6838\u521d\u59cb\u5316\u76f8\u5173\u7684\u4ee3\u7801\uff0cmm\u7528\u4e8e\u5b58\u653e\u5185\u5b58\u7ba1\u7406\u76f8\u5173\u7684\u4ee3\u7801\u7b49\u7b49\u3002 \u4e0b\u9762\uff0c\u6211\u4eec\u4ee5\u67e5\u770b\u8fdb\u7a0b\u7ba1\u7406\u76f8\u5173\u7684\u4ee3\u7801\u4e3a\u4f8b\uff0c\u7ed9\u51fa\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff1a \u8fdb\u7a0b\u7ba1\u7406\u76f8\u5173\u7684\u4ee3\u7801\u4e00\u822c\u5b58\u653e\u5728 kernel \u76ee\u5f55\u4e0b\u7684 pid.c \u548c sched.c \u7b49\u6587\u4ef6\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a pid.c: #include <linux> #include <linux> struct pid *find_get_pid(pid_t nr) { struct pid *pid; rcu_read_lock(); pid = __find_get_pid(nr); if (pid) get_pid(pid); rcu_read_unlock(); return pid; }<\/linux><\/linux> \u767b\u5f55\u540e\u590d\u5236 sched.c: #include <linux> #include […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-17689","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17689","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=17689"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/17689\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=17689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=17689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=17689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}