{"id":112538,"date":"2026-10-03T23:41:02","date_gmt":"2026-10-03T15:41:02","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/112538.html"},"modified":"2026-10-03T23:41:02","modified_gmt":"2026-10-03T15:41:02","slug":"tlb-fops_tlbflush","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/112538.html","title":{"rendered":"tlb fops_tlbflush"},"content":{"rendered":"

x86 \u67b6\u6784\u4e2d\u7528\u4e8e\u66b4\u9732 TLB \u5237\u65b0\u8c03\u4f18\u53c2\u6570\u7684 debugfs \u6587\u4ef6\u64cd\u4f5c\u63a5\u53e3\u3002<\/p>\n

\u7ed3\u6784\u4f53\u9010\u5b57\u6bb5\u89e3\u6790<\/h4>\n

static const struct file_operations fops_tlbflush = {
\n .read = tlbflush_read_file, \/\/ \u8bfb\u53d6\u5f53\u524d tlb_single_page_flush_ceiling \u503c
\n .write = tlbflush_write_file, \/\/ \u5199\u5165\u65b0\u7684\u9608\u503c
\n .llseek = default_llseek, \/\/ \u4f7f\u7528\u9ed8\u8ba4\u7684 lseek \u5b9e\u73b0
\n};<\/p>\n\n\u5b57\u6bb5\u7ed1\u5b9a\u51fd\u6570\u4f5c\u7528<\/tr>\n\n\n\n\n
.read<\/td>\ntlbflush_read_file<\/td>\n\u7528\u6237\u8bfb\u53d6\u6587\u4ef6\u65f6，\u5c06\u00a0tlb_single_page_flush_ceiling\u00a0\u7684\u5f53\u524d\u503c\u683c\u5f0f\u5316\u4e3a\u5b57\u7b26\u4e32\u8fd4\u56de<\/td>\n<\/tr>\n
.write<\/td>\ntlbflush_write_file<\/td>\n\u7528\u6237\u5199\u5165\u6587\u4ef6\u65f6，\u89e3\u6790\u8f93\u5165\u5e76\u66f4\u65b0\u00a0tlb_single_page_flush_ceiling<\/td>\n<\/tr>\n
.llseek<\/td>\ndefault_llseek<\/td>\n\u63d0\u4f9b\u6807\u51c6\u7684\u6587\u4ef6\u504f\u79fb\u91cf\u64cd\u4f5c，\u786e\u4fdd\u00a0read\/write\u00a0\u7684\u00a0ppos\u00a0\u53c2\u6570\u884c\u4e3a\u6b63\u786e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6ce8\u518c\u4f4d\u7f6e\u4e0e\u8bbf\u95ee\u8def\u5f84<\/h4>\n

\u8fd9\u4e2a\u00a0file_operations\u00a0\u7ed3\u6784\u4f53\u901a\u5e38\u5728\u00a0arch\/x86\/mm\/tlb.c\u00a0\u7684\u521d\u59cb\u5316\u51fd\u6570\u4e2d，\u901a\u8fc7\u00a0debugfs_create_file()\u00a0\u6ce8\u518c\u5230 debugfs：<\/p>\n

static int __init create_tlb_single_page_flush_ceiling(void)
\n{
\n debugfs_create_file("tlb_single_page_flush_ceiling", S_IRUSR | S_IWUSR,
\n arch_debugfs_dir, NULL, &fops_tlbflush);
\n return 0;
\n}
\nlate_initcall(create_tlb_single_page_flush_ceiling);<\/p>\n

\u6ce8\u518c\u540e，\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u8def\u5f84\u8bbf\u95ee：<\/p>\n

\/sys\/kernel\/debug\/x86\/tlb_single_page_flush_ceiling<\/p>\n

\u8bbe\u8ba1\u610f\u56fe<\/h4>\n

\u8fd9\u4e2a\u63a5\u53e3\u662f\u5185\u6838\u5bf9\u6027\u80fd\u8c03\u4f18\u5f00\u653e\u6027\u7684\u4f53\u73b0\u3002tlb_single_page_flush_ceiling\u00a0\u7684\u9ed8\u8ba4\u503c 33 \u662f\u4e00\u4e2a\u7ecf\u9a8c\u503c，\u9002\u7528\u4e8e\u5927\u591a\u6570\u5de5\u4f5c\u8d1f\u8f7d，\u4f46\u5e76\u975e\u5bf9\u6240\u6709\u573a\u666f\u90fd\u6700\u4f18\u3002\u901a\u8fc7\u66b4\u9732\u8fd9\u4e2a\u53ef\u8bfb\u5199\u7684 debugfs \u6587\u4ef6，\u5185\u6838\u5141\u8bb8\u7cfb\u7edf\u7ba1\u7406\u5458\u548c\u6027\u80fd\u5de5\u7a0b\u5e08：<\/p>\n

  • \n

    \u8bfb\u53d6\u5f53\u524d\u503c：\u786e\u8ba4\u5185\u6838\u6b63\u5728\u4f7f\u7528\u7684\u9608\u503c\u3002<\/p>\n<\/li>\n

  • \n

    \u52a8\u6001\u8c03\u6574：\u6839\u636e\u7279\u5b9a\u5de5\u4f5c\u8d1f\u8f7d（\u5982\u9ad8\u9891\u00a0munmap\u3001\u5927\u9875\u5bc6\u96c6\u573a\u666f）\u8c03\u6574\u9608\u503c，\u5728\u00a0invlpg\u00a0\u6307\u4ee4\u5f00\u9500\u548c CR3 \u91cd\u8f7d\u5f00\u9500\u4e4b\u95f4\u627e\u5230\u66f4\u4f18\u7684\u5e73\u8861\u70b9\u3002<\/p>\n<\/li>\n

    \u7531\u4e8e\u4f7f\u7528\u4e86\u00a0S_IRUSR | S_IWUSR\u00a0\u6743\u9650，\u53ea\u6709 root \u7528\u6237\u624d\u80fd\u8bfb\u5199，\u907f\u514d\u4e86\u975e\u7279\u6743\u7528\u6237\u610f\u5916\u7834\u574f\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    x86 \u67b6\u6784\u4e2d\u7528\u4e8e\u66b4\u9732 TLB \u5237\u65b0\u8c03\u4f18\u53c2\u6570\u7684 debugfs \u6587\u4ef6\u64cd\u4f5c\u63a5\u53e3\u3002\u7ed3\u6784\u4f53\u9010\u5b57\u6bb5\u89e3\u6790static const struct file_operations fops_tlbflush {.read tlbflush_read_file, \/\/ \u8bfb\u53d6\u5f53\u524d tlb_single_page_flush_ceiling \u503c.write tlbflush_write_file, \/\/ \u5199\u5165\u65b0\u7684\u9608\u503c.llseek default_llseek, <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58],"topic":[],"class_list":["post-112538","post","type-post","status-publish","format-standard","hentry","category-server","tag-linux"],"yoast_head":"\ntlb fops_tlbflush - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/112538.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"tlb fops_tlbflush - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"x86 \u67b6\u6784\u4e2d\u7528\u4e8e\u66b4\u9732 TLB \u5237\u65b0\u8c03\u4f18\u53c2\u6570\u7684 debugfs \u6587\u4ef6\u64cd\u4f5c\u63a5\u53e3\u3002\u7ed3\u6784\u4f53\u9010\u5b57\u6bb5\u89e3\u6790static const struct file_operations fops_tlbflush {.read tlbflush_read_file, \/\/ \u8bfb\u53d6\u5f53\u524d tlb_single_page_flush_ceiling \u503c.write tlbflush_write_file, \/\/ \u5199\u5165\u65b0\u7684\u9608\u503c.llseek default_llseek,\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/112538.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-03T15:41:02+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/112538.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/112538.html\",\"name\":\"tlb fops_tlbflush - 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\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/112538.html","og_locale":"zh_CN","og_type":"article","og_title":"tlb fops_tlbflush - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"x86 \u67b6\u6784\u4e2d\u7528\u4e8e\u66b4\u9732 TLB \u5237\u65b0\u8c03\u4f18\u53c2\u6570\u7684 debugfs \u6587\u4ef6\u64cd\u4f5c\u63a5\u53e3\u3002\u7ed3\u6784\u4f53\u9010\u5b57\u6bb5\u89e3\u6790static const struct file_operations fops_tlbflush {.read tlbflush_read_file, \/\/ \u8bfb\u53d6\u5f53\u524d tlb_single_page_flush_ceiling \u503c.write tlbflush_write_file, \/\/ \u5199\u5165\u65b0\u7684\u9608\u503c.llseek default_llseek,","og_url":"https:\/\/www.wsisp.com\/helps\/112538.html","og_site_name":"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","article_published_time":"2026-10-03T15:41:02+00:00","author":"admin","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"admin","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wsisp.com\/helps\/112538.html","url":"https:\/\/www.wsisp.com\/helps\/112538.html","name":"tlb fops_tlbflush - 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