{"id":208373,"date":"2025-08-03T21:25:31","date_gmt":"2025-08-03T13:25:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/?p=208373"},"modified":"2025-08-03T21:25:31","modified_gmt":"2025-08-03T13:25:31","slug":"%e6%b7%b1%e5%85%a5%e8%a7%a3%e6%9e%90-linux-%e8%a8%98%e6%86%b6%e9%ab%94%e7%ae%a1%e7%90%86%e4%b8%ad%e7%9a%84%e5%88%86%e9%a0%81%e6%a9%9f%e5%88%b6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208373\/","title":{"rendered":"\u6df1\u5165\u89e3\u6790 Linux \u8a18\u61b6\u9ad4\u7ba1\u7406\u4e2d\u7684\u5206\u9801\u6a5f\u5236"},"content":{"rendered":"<p class=\"ds-markdown-paragraph\"><strong>\u6b63\u6587\uff1a<\/strong><br \/>\n\u672c\u6587\u5c07\u8a73\u7d30\u63a2\u8a0e Linux \u6838\u5fc3\u4e2d\u7684\u5206\u9801\u6a5f\u5236\uff0c\u6db5\u84cb\u8a18\u61b6\u9ad4\u6a21\u578b\u3001\u7bc0\u9ede\u8207\u5340\u57df\u5283\u5206\u3001\u9801\u9762\u5206\u914d\u7b56\u7565\u3001\u6838\u5fc3\u9801\u8868\u548c\u9801\u9762\u4ea4\u63db\u7b49\u6838\u5fc3\u5167\u5bb9\u3002\u540c\u6642\uff0c\u7d50\u5408<a href=\"https:\/\/server.hk\/\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u7684\u5be6\u969b\u61c9\u7528\u5834\u666f\uff0c\u5206\u6790\u5176\u5728\u9ad8\u6027\u80fd\u8a08\u7b97\u4e2d\u7684\u512a\u5316\u5be6\u8e10\u3002\u672c\u6559\u7a0b\u7d50\u69cb\u6e05\u6670\u3001\u5c64\u6b21\u5206\u660e\uff0c\u65e8\u5728\u5e6b\u52a9\u8b80\u8005\u6df1\u5165\u7406\u89e3 Linux \u8a18\u61b6\u9ad4\u7ba1\u7406\u7684\u5206\u9801\u539f\u7406\u3002<\/p>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u4e00\u3001\u5f15\u8a00<\/strong><\/p>\n<p class=\"ds-markdown-paragraph\">\u8a18\u61b6\u9ad4\u7ba1\u7406\u662f\u4f5c\u696d\u7cfb\u7d71\u7684\u6838\u5fc3\u529f\u80fd\u4e4b\u4e00\uff0c\u78ba\u4fdd\u884c\u7a0b\u80fd\u5920\u9ad8\u6548\u5229\u7528\u7cfb\u7d71\u8cc7\u6e90\uff0c\u540c\u6642\u7dad\u6301\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6548\u80fd\u3002\u5728\u4f3a\u670d\u5668\u7b49\u9ad8\u6027\u80fd\u8a08\u7b97\u74b0\u5883\u4e2d\uff0c\u8a18\u61b6\u9ad4\u7ba1\u7406\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u9019\u4e9b\u4f3a\u670d\u5668\u901a\u5e38\u9700\u8981\u8655\u7406\u5927\u91cf\u4f75\u767c\u8acb\u6c42\u3001\u904b\u884c\u591a\u500b\u865b\u64ec\u6a5f\u5668\u6216\u5bb9\u5668\u5316\u61c9\u7528\uff0c\u4e26\u652f\u63f4\u9ad8\u5bc6\u5ea6\u7684\u8cc7\u6599\u4e2d\u5fc3\u9700\u6c42\u3002Linux \u4f5c\u70ba\u4e3b\u6d41\u7684\u4f3a\u670d\u5668\u4f5c\u696d\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u8a18\u61b6\u9ad4\u7ba1\u7406\u6a5f\u5236\uff0c\u5176\u4e2d\u5206\u9801\u6a5f\u5236\u662f\u5176\u865b\u64ec\u8a18\u61b6\u9ad4\u7ba1\u7406\u7684\u95dc\u9375\u7d44\u6210\u90e8\u5206\u3002<\/p>\n<p class=\"ds-markdown-paragraph\"><strong>\u672c\u6587\u5c07\u5f9e\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\u5c55\u958b\u8a0e\u8ad6\uff1a<\/strong><\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u8a18\u61b6\u9ad4\u6a21\u578b\uff1a<\/strong>\u00a0\u5e73\u5766\u8a18\u61b6\u9ad4\u6a21\u578b\u3001SMP \u548c NUMA \u7684\u7279\u6027\u8207\u61c9\u7528\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u8a18\u61b6\u9ad4\u7684\u5c64\u6b21\u5283\u5206\uff1a<\/strong>\u00a0\u7bc0\u9ede\u3001\u5340\u57df\u548c\u9801\u9762\u7684\u7d44\u7e54\u65b9\u5f0f\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u9801\u9762\u5206\u914d\u6a5f\u5236\uff1a<\/strong>\u00a0\u5925\u4f34\u7cfb\u7d71\u548c Slub Allocator \u7684\u5be6\u4f5c\u539f\u7406\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6838\u5fc3\u9801\u8868\uff1a<\/strong>\u00a0\u521d\u59cb\u5316\u548c\u865b\u64ec\u5230\u5be6\u9ad4\u4f4d\u5740\u7684\u6620\u5c04\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u9801\u9762\u4ea4\u63db\uff1a<\/strong>\u00a0\u88ab\u52d5\u56de\u6536\u548c\u4e3b\u52d5\u7ba1\u7406\u7684\u7b56\u7565\u3002<\/p>\n<\/li>\n<\/ol>\n<p class=\"ds-markdown-paragraph\">\u900f\u904e\u9019\u4e9b\u5167\u5bb9\uff0c\u8b80\u8005\u5c07\u80fd\u5920\u7406\u89e3 Linux \u8a18\u61b6\u9ad4\u7ba1\u7406\u4e2d\u7684\u5206\u9801\u6a5f\u5236\uff0c\u4e26\u8a8d\u8b58\u5230\u5176\u5728\u4f3a\u670d\u5668\u7b49\u9ad8\u6548\u80fd\u74b0\u5883\u4e2d\u7684\u5be6\u969b\u61c9\u7528\u50f9\u503c\u3002<\/p>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u4e8c\u3001\u8a18\u61b6\u9ad4\u6a21\u578b\u6982\u8ff0<\/strong><\/p>\n<p class=\"ds-markdown-paragraph\">Linux \u652f\u63f4\u591a\u7a2e\u8a18\u61b6\u9ad4\u6a21\u578b\uff0c\u4ee5\u9069\u61c9\u4e0d\u540c\u7684\u786c\u9ad4\u67b6\u69cb\u548c\u6548\u80fd\u9700\u6c42\u3002\u4ee5\u4e0b\u662f\u4e09\u7a2e\u4e3b\u8981\u8a18\u61b6\u9ad4\u6a21\u578b\u7684\u7c21\u4ecb\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>2.1 \u5e73\u5766\u8a18\u61b6\u9ad4\u6a21\u578b (Flat Memory Model)<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u63a1\u7528\u9023\u7e8c\u7684\u5be6\u9ad4\u4f4d\u5740\u7a7a\u9593\uff0c\u9801\u9762\u7de8\u865f\u8207\u4f4d\u5740\u4e4b\u9593\u5b58\u5728\u7c21\u55ae\u7684\u7dda\u6027\u6620\u5c04\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u512a\u9ede\uff1a<\/strong>\u00a0\u7d50\u69cb\u7c21\u55ae\uff0c\u9069\u5408\u65e9\u671f\u786c\u9ad4\u6216\u5c0f\u578b\u7cfb\u7d71\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7f3a\u9ede\uff1a<\/strong>\u00a0\u96a8\u8457\u8a18\u61b6\u9ad4\u9700\u6c42\u548c\u884c\u7a0b\u6578\u91cf\u7684\u589e\u52a0\uff0c\u5176\u64f4\u5145\u6027\u53d7\u9650\uff0c\u7121\u6cd5\u6eff\u8db3\u73fe\u4ee3\u591a\u8655\u7406\u5668\u7cfb\u7d71\u7684\u8907\u96dc\u9700\u6c42\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\u5834\u666f\uff1a<\/strong>\u00a0\u9069\u7528\u65bc\u8cc7\u6e90\u53d7\u9650\u7684\u5d4c\u5165\u5f0f\u7cfb\u7d71\u6216\u65e9\u671f\u96fb\u8166\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>2.2 \u5c0d\u7a31\u591a\u8655\u7406\u6a21\u578b (Symmetric Multi-Processing, SMP)<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u5141\u8a31\u591a\u500b\u8655\u7406\u5668\u5e73\u7b49\u5b58\u53d6\u5171\u4eab\u4e3b\u8a18\u61b6\u9ad4\uff0c\u7531\u55ae\u4e00\u4f5c\u696d\u7cfb\u7d71\u7d71\u4e00\u6392\u7a0b\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7279\u9ede\uff1a<\/strong>\u00a0\u900f\u904e\u8ca0\u8f09\u5e73\u8861\u6700\u4f73\u5316\u8cc7\u6e90\u5229\u7528\u7387\uff1b\u6240\u6709\u8655\u7406\u5668\u5171\u4eab\u540c\u4e00\u8a18\u61b6\u9ad4\u7a7a\u9593\uff0c\u53ef\u80fd\u5c0e\u81f4\u5b58\u53d6\u722d\u7528\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\u5834\u666f\uff1a<\/strong>\u00a0\u5ee3\u6cdb\u7528\u65bc\u591a\u6838\u4f3a\u670d\u5668\u74b0\u5883\u4e2d\uff0c\u63d0\u5347\u4f75\u767c\u8655\u7406\u80fd\u529b\uff0c\u9069\u5408\u904b\u884c\u591a\u57f7\u884c\u7dd2\u61c9\u7528\u6216\u865b\u64ec\u5316\u74b0\u5883\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>2.3 \u975e\u5747\u52fb\u8a18\u61b6\u9ad4\u5b58\u53d6\u6a21\u578b (Non-Uniform Memory Access, NUMA)<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u6bcf\u500b CPU \u64c1\u6709\u672c\u5730\u8a18\u61b6\u9ad4\uff0c\u5b58\u53d6\u672c\u5730\u8a18\u61b6\u9ad4\u7684\u5ef6\u9072\u4f4e\u65bc\u9060\u7aef\u8a18\u61b6\u9ad4\uff1bCPU \u548c\u8a18\u61b6\u9ad4\u5171\u540c\u69cb\u6210 NUMA \u7bc0\u9ede\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7279\u9ede\uff1a<\/strong>\u00a0\u900f\u904e\u6700\u4f73\u5316\u672c\u5730\u8a18\u61b6\u9ad4\u5b58\u53d6\uff0c\u986f\u8457\u63d0\u9ad8\u6548\u80fd\uff1b\u4f46\u8de8\u7bc0\u9ede\u5b58\u53d6\u6703\u589e\u52a0\u5ef6\u9072\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\u5834\u666f\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0cNUMA \u6a21\u578b\u900f\u904e\u6700\u4f73\u5316\u8a18\u61b6\u9ad4\u5206\u914d\uff0c\u986f\u8457\u63d0\u9ad8\u9ad8\u6548\u80fd\u8a08\u7b97\u4efb\u52d9\u7684\u6548\u7387\uff0c\u5982\u8cc7\u6599\u5eab\u8655\u7406\u6216\u5206\u6563\u5f0f\u8a08\u7b97\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6311\u6230\uff1a<\/strong>\u00a0\u7576\u672c\u5730\u8a18\u61b6\u9ad4\u4e0d\u8db3\u6642\uff0c\u8de8\u7bc0\u9ede\u5b58\u53d6\u9700\u8981\u6838\u5fc3\u9032\u884c\u667a\u6167\u7684\u8a18\u61b6\u9ad4\u5206\u914d\u7b56\u7565\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p class=\"ds-markdown-paragraph\"><strong>\u7e3d\u7d50\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c<strong>NUMA \u6a21\u578b<\/strong>\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u5b83\u80fd\u5920\u66f4\u597d\u5730\u9069\u61c9\u591a\u8655\u7406\u5668\u67b6\u69cb\u548c\u9ad8\u6027\u80fd\u9700\u6c42\uff0c\u6e1b\u5c11\u8a18\u61b6\u9ad4\u5b58\u53d6\u5ef6\u9072\uff0c\u63d0\u5347\u7cfb\u7d71\u541e\u5410\u91cf\u3002<\/p>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u4e09\u3001\u8a18\u61b6\u9ad4\u7684\u5c64\u6b21\u5283\u5206<\/strong><\/p>\n<p class=\"ds-markdown-paragraph\">Linux \u5c07\u5be6\u9ad4\u8a18\u61b6\u9ad4\u5283\u5206\u70ba<strong>\u7bc0\u9ede (Node)<\/strong>\u3001<strong>\u5340\u57df (Zone)<\/strong>\u00a0\u548c<strong>\u9801\u9762 (Page)<\/strong>\u00a0\u4e09\u500b\u5c64\u6b21\uff0c\u4ee5\u5be6\u73fe\u9ad8\u6548\u7ba1\u7406\u3002<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>3.1 \u7bc0\u9ede (Node)<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u5728 NUMA \u67b6\u69cb\u4e2d\uff0c\u8a18\u61b6\u9ad4\u88ab\u5283\u5206\u70ba\u591a\u500b\u7bc0\u9ede\uff0c\u6bcf\u500b\u7bc0\u9ede\u5c0d\u61c9\u4e00\u500b CPU \u53ca\u5176\u672c\u5730\u8a18\u61b6\u9ad4\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7d50\u69cb\uff1a<\/strong>\u00a0\u900f\u904e\u00a0<code>pglist_data<\/code>\u00a0\u7d50\u69cb\u9ad4\u63cf\u8ff0\uff0c\u5305\u542b\u4ee5\u4e0b\u95dc\u9375\u6b04\u4f4d\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>node_id<\/code>\uff1a\u7bc0\u9ede\u552f\u4e00\u6a19\u8b58\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>node_zones<\/code>\uff1a\u7bc0\u9ede\u5167\u7684\u5340\u57df\u9663\u5217\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>node_zonelists<\/code>\uff1a\u5099\u7528\u7bc0\u9ede\u548c\u5340\u57df\u7684\u93c8\u7d50\u4e32\u5217\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>node_mem_map<\/code>\uff1a\u7bc0\u9ede\u7684\u9801\u9762\u9663\u5217\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>node_start_pfn<\/code>\uff1a\u7bc0\u9ede\u8d77\u59cb\u9801\u9762\u6846\u67b6\u865f\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>node_present_pages<\/code>\uff1a\u7bc0\u9ede\u5167\u53ef\u7528\u5be6\u9ad4\u9801\u9762\u7e3d\u6578\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>node_spanned_pages<\/code>\uff1a\u7bc0\u9ede\u8986\u84cb\u7684\u9801\u9762\u7e3d\u6578\uff08\u5305\u62ec\u7a7a\u6d1e\uff09\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>kswapd_wait<\/code>\u3001<code>kswapd<\/code>\u00a0\u7b49\uff1a\u8207\u9801\u9762\u56de\u6536\u548c\u4ea4\u63db\u76f8\u95dc\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u900f\u904e\u6700\u4f73\u5316\u7bc0\u9ede\u9593\u8a18\u61b6\u9ad4\u5206\u914d\uff0c\u6e1b\u5c11\u9060\u7aef\u5b58\u53d6\u5ef6\u9072\uff0c\u63d0\u5347\u6548\u80fd\u3002\u4f8b\u5982\uff0c\u904b\u884c\u9ad8\u4f75\u767c\u61c9\u7528\u7684\u4f3a\u670d\u5668\u53ef\u4ee5\u900f\u904e NUMA \u6700\u4f73\u5316\u964d\u4f4e\u8a18\u61b6\u9ad4\u5b58\u53d6\u74f6\u9838\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>3.2 \u5340\u57df (Zone)<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u6bcf\u500b\u7bc0\u9ede\u9032\u4e00\u6b65\u5283\u5206\u70ba\u591a\u500b\u5340\u57df\uff0c\u5132\u5b58\u5728\u00a0<code>node_zones<\/code>\u00a0\u4e2d\uff1b<code>node_zonelists<\/code>\u00a0\u4ee5\u93c8\u7d50\u4e32\u5217\u5f62\u5f0f\u5132\u5b58\u5099\u7528\u7bc0\u9ede\u548c\u5340\u57df\u8cc7\u8a0a\uff1b<code>nr_zones<\/code>\u00a0\u8868\u793a\u5340\u57df\u7e3d\u6578\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5340\u57df\u985e\u578b\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>ZONE_DMA<\/code>\uff1a\u7528\u65bc\u76f4\u63a5\u8a18\u61b6\u9ad4\u5b58\u53d6 (DMA)\uff0c\u9069\u7528\u65bc\u786c\u9ad4\u8cc7\u6599\u50b3\u8f38\uff0c\u89e3\u653e CPU \u8cc7\u6e90\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>ZONE_NORMAL<\/code>\uff1a\u76f4\u63a5\u6620\u5c04\u5340\uff0c\u8986\u84cb\u6838\u5fc3\u614b\u7684\u4f4e\u4f4d\u5740\u7a7a\u9593\uff0832 \u4f4d\u5143\u7cfb\u7d71\u4e2d\u70ba\u524d 896MB\uff09\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>ZONE_HIGHMEM<\/code>\uff1a\u9ad8\u7aef\u8a18\u61b6\u9ad4\u5340\uff0c\u9069\u7528\u65bc 32 \u4f4d\u5143\u7cfb\u7d71\u7684\u9ad8\u4f4d\u5740\u7a7a\u9593\uff0c64 \u4f4d\u5143\u7cfb\u7d71\u901a\u5e38\u7121\u9700\u6b64\u5340\u57df\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>ZONE_MOVABLE<\/code>\uff1a\u53ef\u79fb\u52d5\u5340\u57df\uff0c\u900f\u904e\u5283\u5206\u53ef\u79fb\u52d5\u548c\u4e0d\u53ef\u79fb\u52d5\u5206\u914d\u5340\u57df\uff0c\u6e1b\u5c11\u8a18\u61b6\u9ad4\u788e\u7247\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7d50\u69cb\uff1a<\/strong>\u00a0\u900f\u904e\u00a0<code>zone<\/code>\u00a0\u7d50\u69cb\u9ad4\u7ba1\u7406\uff0c\u5305\u542b\u4ee5\u4e0b\u95dc\u9375\u6b04\u4f4d\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>zone_start_pfn<\/code>\uff1a\u5340\u57df\u8d77\u59cb\u9801\u9762\u865f\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>spanned_pages<\/code>\uff1a\u5340\u57df\u7e3d\u5171\u8de8\u591a\u5c11\u9801\u9762\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>present_pages<\/code>\uff1a\u5340\u57df\u5167\u771f\u5be6\u5b58\u5728\u7684\u9801\u9762\u6578\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>managed_pages<\/code>\uff1a\u7531\u5925\u4f34\u7cfb\u7d71\u7ba1\u7406\u7684\u9801\u9762\u6578\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>per_cpu_pageset<\/code>\uff1a\u5340\u5206\u51b7\u71b1\u9801\u9762\uff08\u71b1\u9801\u9762\u8f09\u5165\u5230 CPU \u9ad8\u901f\u5feb\u53d6\uff0c\u5b58\u53d6\u901f\u5ea6\u66f4\u5feb\uff09\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u5408\u7406\u914d\u7f6e\u5340\u57df\u985e\u578b\u53ef\u4ee5\u6700\u4f73\u5316\u8a18\u61b6\u9ad4\u5206\u914d\u6548\u7387\uff0c\u78ba\u4fdd\u95dc\u9375\u61c9\u7528\uff08\u5982\u8cc7\u6599\u5eab\u6216 Web \u4f3a\u670d\u5668\uff09\u7372\u5f97\u8db3\u5920\u7684\u8a18\u61b6\u9ad4\u8cc7\u6e90\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>3.3 \u9801\u9762 (Page)<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u9801\u9762\u662f\u8a18\u61b6\u9ad4\u7ba1\u7406\u7684\u6700\u5c0f\u55ae\u4f4d\uff0c\u900f\u904e\u00a0<code>page<\/code>\u00a0\u7d50\u69cb\u9ad4\u63cf\u8ff0\uff0c\u652f\u63f4\u591a\u7a2e\u7528\u9014\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7528\u9014\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6574\u9801\u4f7f\u7528\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u533f\u540d\u9801\u9762\uff1a\u76f4\u63a5\u6620\u5c04\u5230\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u8a18\u61b6\u9ad4\u6620\u5c04\u6a94\u6848\u9801\u9762\uff1a\u95dc\u806f\u6a94\u6848\u7cfb\u7d71\uff0c\u8207\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\u5efa\u7acb\u6620\u5c04\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5c0f\u584a\u8a18\u61b6\u9ad4\u5206\u914d\uff1a<\/strong>\u00a0\u900f\u904e Slub Allocator \u5c07\u9801\u9762\u5207\u5206\u70ba\u5c0f\u584a\uff0c\u9069\u7528\u65bc\u5c0f\u8a18\u61b6\u9ad4\u5206\u914d\u5834\u666f\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u8907\u5408\u9801\u9762\uff1a<\/strong>\u00a0\u5c07\u591a\u500b\u9023\u7e8c\u9801\u9762\u8996\u70ba\u4e00\u500b\u5927\u9801\u9762\uff0c\u6700\u4f73\u5316\u5927\u584a\u8a18\u61b6\u9ad4\u5206\u914d\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7d50\u69cb\uff1a<\/strong>\u00a0<code>page<\/code>\u00a0\u7d50\u69cb\u9ad4\u5305\u542b\u4ee5\u4e0b\u95dc\u9375\u6b04\u4f4d\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>mapping<\/code>\uff1a\u6620\u5c04\u8cc7\u8a0a\uff08\u533f\u540d\u9801\u6700\u4f4e\u4f4d\u70ba 1\uff0c\u6a94\u6848\u6620\u5c04\u9801\u70ba 0\uff09\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>index<\/code>\uff1a\u6620\u5c04\u5340\u7684\u504f\u79fb\u91cf\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>_mapcount<\/code>\uff1a\u6307\u5411\u8a72\u9801\u7684\u9801\u8868\u6578\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>lru<\/code>\uff1a\u7528\u65bc\u9801\u9762\u4ea4\u63db\u7684\u93c8\u7d50\u4e32\u5217\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>s_mem<\/code>\u3001<code>freelist<\/code>\u00a0\u7b49\uff1a\u7528\u65bc Slub Allocator \u7684\u5c0f\u584a\u8a18\u61b6\u9ad4\u7ba1\u7406\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u9801\u9762\u7ba1\u7406\u7684\u6548\u7387\u76f4\u63a5\u5f71\u97ff\u5230\u7cfb\u7d71\u7684\u6574\u9ad4\u6548\u80fd\uff0c\u5c24\u5176\u662f\u5728\u8655\u7406\u5927\u91cf\u5c0f\u8a18\u61b6\u9ad4\u5206\u914d\u7684\u5834\u666f\u4e2d\uff0c\u5982\u884c\u7a0b\u5efa\u7acb\u6216\u8cc7\u6599\u7d50\u69cb\u5206\u914d\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u56db\u3001\u9801\u9762\u5206\u914d\u6a5f\u5236<\/strong><\/p>\n<p class=\"ds-markdown-paragraph\">Linux \u900f\u904e<strong>\u5925\u4f34\u7cfb\u7d71 (Buddy System)<\/strong>\u00a0\u548c\u00a0<strong>Slub Allocator<\/strong>\u00a0\u5be6\u4f5c\u9801\u9762\u5206\u914d\uff0c\u6eff\u8db3\u4e0d\u540c\u5834\u666f\u7684\u8a18\u61b6\u9ad4\u9700\u6c42\u3002<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>4.1 \u5925\u4f34\u7cfb\u7d71 (Buddy System)<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u9069\u7528\u65bc\u5206\u914d\u8f03\u5927\u8a18\u61b6\u9ad4\u584a\uff08\u9801\u9762\u7d1a\u5225\uff09\uff0c\u900f\u904e\u7dad\u8b77\u591a\u500b\u7a7a\u9592\u9801\u9762\u93c8\u7d50\u4e32\u5217\u5be6\u73fe\u9ad8\u6548\u5206\u914d\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6a5f\u5236\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u6bcf\u500b\u93c8\u7d50\u4e32\u5217\u4e2d\u7684\u7bc0\u9ede\u5305\u542b\u7684\u9801\u9762\u6578\u70ba 2 \u7684\u51aa\u6b21\u65b9\uff0c\u5373\u7b2c\u00a0<code>i<\/code>\u00a0\u500b\u93c8\u7d50\u4e32\u5217\u7684\u6bcf\u500b\u7bc0\u9ede\u64c1\u6709\u00a0<code>2^i<\/code>\u00a0\u500b\u9801\u9762\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u7576\u8acb\u6c42\u5206\u914d\u00a0<code>(2^(i-1), 2^i]<\/code>\u00a0\u6578\u76ee\u7684\u9801\u9762\u6642\uff0c\u6309\u7167\u00a0<code>2^i<\/code>\u00a0\u9801\u9762\u8acb\u6c42\u8655\u7406\uff0c\u4e26\u5c07\u5176\u5206\u88c2\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u5982\u679c\u7576\u524d\u93c8\u7d50\u4e32\u5217\u7121\u7a7a\u9592\u9801\u9762\uff0c\u5247\u5f9e\u66f4\u5927\u7684\u9801\u9762\u93c8\u7d50\u4e32\u5217\u4e2d\u627e\u5c0b\u4e26\u5206\u88c2\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5be6\u4f5c\uff1a<\/strong>\u00a0\u900f\u904e\u00a0<code>alloc_pages()<\/code>\u00a0\u51fd\u6578\u5be6\u4f5c\uff0c\u53c3\u6578\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>gfp_mask<\/code>\uff1a\u5206\u914d\u5340\u57df\u6a19\u8a8c\uff08\u5982\u00a0<code>GFP_KERNEL<\/code>\u00a0\u5206\u914d\u00a0<code>ZONE_NORMAL<\/code>\u3001<code>GFP_HIGHMEM<\/code>\u00a0\u5206\u914d\u9ad8\u7aef\u8a18\u61b6\u9ad4\u7b49\uff09\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>order<\/code>\uff1a\u5206\u914d\u00a0<code>2^order<\/code>\u00a0\u500b\u9801\u9762\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6700\u4f73\u5316\u6280\u8853\uff1a<\/strong>\u00a0\u4ea4\u53c9\u5b58\u53d6 (interleaved memory) \u5c07\u8a18\u61b6\u9ad4\u5206\u70ba\u591a\u500b\u6a21\u7d44\uff0c\u985e\u4f3c\u8ca0\u8f09\u5e73\u8861\u9010\u500b\u5beb\u5165\uff0c\u63d0\u9ad8\u8b80\u5beb\u901f\u5ea6\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u5925\u4f34\u7cfb\u7d71\u7528\u65bc\u5927\u898f\u6a21\u8a18\u61b6\u9ad4\u5206\u914d\uff0c\u5982\u865b\u64ec\u6a5f\u5668\u6216\u5bb9\u5668\u7684\u8a18\u61b6\u9ad4\u5206\u914d\uff0c\u78ba\u4fdd\u9ad8\u6548\u7684\u8a18\u61b6\u9ad4\u5229\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>4.2 Slub Allocator<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u9069\u7528\u65bc\u5c0f\u584a\u8a18\u61b6\u9ad4\u5206\u914d\uff0c\u5c07\u5f9e\u5925\u4f34\u7cfb\u7d71\u7533\u8acb\u7684\u5927\u584a\u9801\u9762\u5207\u5206\u70ba\u5c0f\u584a\uff0c\u5132\u5b58\u5728\u5feb\u53d6\u4e2d\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6a5f\u5236\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u6bcf\u500b Slub \u5feb\u53d6\u5340 (<code>kmem_cache<\/code>) \u5c0d\u61c9\u4e00\u7a2e\u7269\u4ef6\u985e\u578b\uff08\u5982\u00a0<code>task_struct<\/code>)\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u900f\u904e\u00a0<code>kmem_cache_cpu<\/code>\uff08\u5feb\u901f\u5206\u914d\u8def\u5f91\uff09\u548c\u00a0<code>kmem_cache_node<\/code>\uff08\u6162\u901f\u5206\u914d\u8def\u5f91\uff09\u5be6\u4f5c\u5206\u914d\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5206\u914d\u6d41\u7a0b\uff1a<\/strong><\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5feb\u901f\u8def\u5f91\uff1a<\/strong>\u00a0\u5f9e\u00a0<code>kmem_cache_cpu<\/code>\u00a0\u7684\u00a0<code>freelist<\/code>\u00a0\u53d6\u5f97\u7a7a\u9592\u7269\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6162\u901f\u8def\u5f91\uff1a<\/strong>\u00a0\u7576\u5feb\u901f\u8def\u5f91\u5931\u6557\u6642\uff0c\u5f9e\u00a0<code>kmem_cache_node<\/code>\u00a0\u7684\u00a0<code>partial<\/code>\u00a0\u93c8\u7d50\u4e32\u5217\u53d6\u5f97\uff0c\u6216\u5411\u5925\u4f34\u7cfb\u7d71\u8acb\u6c42\u65b0\u9801\u9762\u3002<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5be6\u4f5c\uff1a<\/strong>\u00a0\u900f\u904e\u00a0<code>kmem_cache_alloc_node()<\/code>\u00a0\u548c\u00a0<code>kmem_cache_free()<\/code>\u00a0\u7ba1\u7406\u5206\u914d\u548c\u91cb\u653e\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0cSlub Allocator \u7684\u6548\u80fd\u6700\u4f73\u5316\u5c0d\u65bc\u983b\u7e41\u7684\u5c0f\u8a18\u61b6\u9ad4\u5206\u914d\uff08\u5982\u884c\u7a0b\u5efa\u7acb\u3001\u8cc7\u6599\u7d50\u69cb\u5206\u914d\uff09\u81f3\u95dc\u91cd\u8981\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4f75\u767c\u5834\u666f\u4e0b\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u4e94\u3001\u6838\u5fc3\u9801\u8868<\/strong><\/p>\n<p class=\"ds-markdown-paragraph\">\u6838\u5fc3\u9801\u8868\u662f Linux \u8a18\u61b6\u9ad4\u7ba1\u7406\u7684\u6838\u5fc3\u5143\u4ef6\uff0c\u8ca0\u8cac\u865b\u64ec\u4f4d\u5740\u5230\u5be6\u9ad4\u4f4d\u5740\u7684\u6620\u5c04\u3002<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>5.1 \u521d\u59cb\u5316<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u5728\u7cfb\u7d71\u555f\u52d5\u6642\uff0c\u900f\u904e\u00a0<code>setup_arch()<\/code>\u00a0\u547c\u53eb\u93c8\u521d\u59cb\u5316\u6838\u5fc3\u9801\u8868\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u95dc\u9375\u6b65\u9a5f\uff1a<\/strong><\/p>\n<ol start=\"1\">\n<li>\n<p class=\"ds-markdown-paragraph\">\u8f09\u5165\u00a0<code>swapper_pg_dir<\/code>\uff08\u6838\u5fc3\u9802\u7d1a\u9801\u76ee\u9304\uff09\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u900f\u904e\u00a0<code>init_mem_mapping()<\/code>\u00a0\u547c\u53eb\u93c8\uff08\u5982\u00a0<code>init_memory_mapping() -&gt; kernel_physical_mapping_init()<\/code>\uff09\u5efa\u7acb\u865b\u64ec\u4f4d\u5740\u548c\u5be6\u9ad4\u4f4d\u5740\u7684\u6620\u5c04\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u4f7f\u7528\u00a0<code>__va<\/code>\u00a0\u548c\u00a0<code>__pa<\/code>\u00a0\u51fd\u6578\u9032\u884c\u4f4d\u5740\u8f49\u63db\uff0c\u4e26\u900f\u904e CR3 \u66ab\u5b58\u5668\u555f\u7528\u9801\u8868\u3002<\/p>\n<\/li>\n<\/ol>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u5feb\u901f\u7684\u9801\u8868\u521d\u59cb\u5316\u78ba\u4fdd\u7cfb\u7d71\u80fd\u5920\u8fc5\u901f\u9032\u5165\u904b\u884c\u72c0\u614b\uff0c\u652f\u63f4\u9ad8\u6548\u7684\u670d\u52d9\u555f\u52d5\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>5.2 \u6620\u5c04<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u6838\u5fc3\u9801\u8868\u900f\u904e\u591a\u7d1a\u9801\u8868\uff08\u5982\u00a0<code>pgd<\/code>,\u00a0<code>pud<\/code>,\u00a0<code>pmd<\/code>,\u00a0<code>pte<\/code>\uff09\u5be6\u4f5c\u865b\u64ec\u5230\u5be6\u9ad4\u4f4d\u5740\u7684\u6620\u5c04\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u95dc\u9375\u7d50\u69cb\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>swapper_pg_dir<\/code>\uff1a\u6307\u5411\u9802\u7d1a\u9801\u76ee\u9304\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>level4_ident_pgt<\/code>\uff1a\u76f4\u63a5\u6620\u5c04\u5340\u9801\u8868\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>level4_kernel_pgt<\/code>\uff1a\u6838\u5fc3\u7a0b\u5f0f\u78bc\u5340\u9801\u8868\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u7279\u9ede\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u76f4\u63a5\u6620\u5c04\u5340 (<code>ZONE_NORMAL<\/code>) \u900f\u904e\u504f\u79fb\u91cf\u5be6\u4f5c\u5be6\u9ad4\u4f4d\u5740\u548c\u865b\u64ec\u4f4d\u5740\u7684\u5feb\u901f\u8f49\u63db\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u9ad8\u7aef\u8a18\u61b6\u9ad4\u5340 (<code>ZONE_HIGHMEM<\/code>) \u900f\u904e\u9ad8\u7aef\u8a18\u61b6\u9ad4\u6620\u5c04\u6a5f\u5236\u652f\u63f4\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u9801\u8868\u6620\u5c04\u7684\u6548\u7387\u76f4\u63a5\u5f71\u97ff\u5230\u8a18\u61b6\u9ad4\u5b58\u53d6\u901f\u5ea6\uff0c\u5c24\u5176\u5728\u8655\u7406\u5927\u8a18\u61b6\u9ad4\u548c\u9ad8\u4f75\u767c\u5834\u666f\u6642\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u516d\u3001\u9801\u9762\u4ea4\u63db<\/strong><\/p>\n<p class=\"ds-markdown-paragraph\">\u7531\u65bc\u865b\u64ec\u8a18\u61b6\u9ad4\u9060\u5927\u65bc\u5be6\u9ad4\u8a18\u61b6\u9ad4\uff0cLinux \u900f\u904e\u9801\u9762\u4ea4\u63db\u6a5f\u5236\u7ba1\u7406\u8a18\u61b6\u9ad4\u4e0d\u8db3\u7684\u60c5\u6cc1\u3002<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>6.1 \u88ab\u52d5\u9801\u9762\u56de\u6536<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u7576\u5be6\u9ad4\u8a18\u61b6\u9ad4\u4e0d\u8db3\u6642\uff0c\u900f\u904e\u00a0<code>get_page_from_freelist()<\/code>\u00a0\u547c\u53eb\u93c8\u5617\u8a66\u56de\u6536\u9801\u9762\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6a5f\u5236\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u6aa2\u67e5 LRU (\u6700\u8fd1\u6700\u5c11\u4f7f\u7528) \u5217\u8868\uff0c\u512a\u5148\u56de\u6536\u4e0d\u6d3b\u8e8d\u9801\u9762\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u5c0d\u65bc<strong>\u533f\u540d\u9801\u9762<\/strong>\uff0c\u5206\u914d swap \u7a7a\u9593\uff0c\u5c07\u9801\u9762\u5beb\u5165\u6a94\u6848\u7cfb\u7d71\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u5c0d\u65bc<strong>\u6a94\u6848\u6620\u5c04\u9801\u9762<\/strong>\uff0c\u5c07\u8a18\u61b6\u9ad4\u4e2d\u7684\u4fee\u6539\u5beb\u56de\u6a94\u6848\u7cfb\u7d71\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5be6\u4f5c\uff1a<\/strong>\u00a0\u900f\u904e\u00a0<code>node_reclaim() -&gt; __node_reclaim() -&gt; shrink_node()<\/code>\u00a0\u547c\u53eb\u93c8\u5be6\u4f5c\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u88ab\u52d5\u56de\u6536\u662f\u9632\u6b62\u8a18\u61b6\u9ad4\u8017\u76e1\u7684\u6700\u5f8c\u9632\u7dda\uff0c\u78ba\u4fdd\u7cfb\u7d71\u5728\u9ad8\u8ca0\u8f09\u4e0b\u4fdd\u6301\u7a69\u5b9a\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>6.2 \u4e3b\u52d5\u9801\u9762\u7ba1\u7406<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u63cf\u8ff0\uff1a<\/strong>\u00a0\u6838\u5fc3\u57f7\u884c\u7dd2\u00a0<code>kswapd<\/code>\u00a0\u5b9a\u671f\u6383\u63cf\u8a18\u61b6\u9ad4\uff0c\u6839\u64da<strong>\u6c34\u4f4d (watermark)<\/strong>\u00a0\u89f8\u767c\u8a18\u61b6\u9ad4\u56de\u6536\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u6c34\u4f4d\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>pages_min<\/code>\uff1a\u6700\u5c0f\u95be\u503c\uff0c\u50c5\u6838\u5fc3\u53ef\u5206\u914d\u8a18\u61b6\u9ad4\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>pages_low<\/code>\uff1a\u4f4e\u95be\u503c\uff0c\u89f8\u767c\u8a18\u61b6\u9ad4\u56de\u6536\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>pages_high<\/code>\uff1a\u9ad8\u95be\u503c\uff0c\u8a18\u61b6\u9ad4\u58d3\u529b\u5c0f\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u8a08\u7b97\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>pages_low = pages_min * 5\/4<\/code><\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><code>pages_high = pages_min * 3\/2<\/code><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u5be6\u4f5c\uff1a<\/strong>\u00a0\u900f\u904e\u00a0<code>balance_pgdat() -&gt; kswapd_shrink_node() -&gt; shrink_node()<\/code>\u00a0\u547c\u53eb\u93c8\u5be6\u4f5c\uff0c<code>shrink_node_memcg()<\/code>\u00a0\u7ba1\u7406 LRU \u5217\u8868\uff0c\u512a\u5148\u56de\u6536\u4e0d\u6d3b\u8e8d\u9801\u9762\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\"><strong>\u61c9\u7528\uff1a<\/strong>\u00a0\u5728\u4f3a\u670d\u5668\u4e2d\uff0c\u4e3b\u52d5\u7ba1\u7406\u78ba\u4fdd\u8a18\u61b6\u9ad4\u59cb\u7d42\u8655\u65bc\u5065\u5eb7\u72c0\u614b\uff0c\u652f\u63f4\u9577\u671f\u7a69\u5b9a\u904b\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u4e03\u3001\u7e3d\u7d50<\/strong><\/p>\n<p class=\"ds-markdown-paragraph\">Linux \u7684\u5206\u9801\u6a5f\u5236\u662f\u5176\u8a18\u61b6\u9ad4\u7ba1\u7406\u7cfb\u7d71\u7684\u6838\u5fc3\uff0c\u6db5\u84cb\u4e86\u5f9e\u8a18\u61b6\u9ad4\u6a21\u578b\u5230\u9801\u9762\u5206\u914d\u3001\u9801\u8868\u6620\u5c04\u548c\u9801\u9762\u4ea4\u63db\u7684\u5404\u500b\u65b9\u9762\u3002<\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">\u900f\u904e<strong>\u5e73\u5766\u8a18\u61b6\u9ad4\u6a21\u578b\u3001SMP \u548c NUMA<\/strong>\u00a0\u7684\u9748\u6d3b\u652f\u63f4\uff0cLinux \u80fd\u5920\u9069\u61c9\u4e0d\u540c\u7684\u786c\u9ad4\u67b6\u69cb\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u900f\u904e<strong>\u7bc0\u9ede\u3001\u5340\u57df\u548c\u9801\u9762<\/strong>\u7684\u5c64\u6b21\u5283\u5206\uff0c\u5be6\u73fe\u9ad8\u6548\u7684\u8a18\u61b6\u9ad4\u7ba1\u7406\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u900f\u904e<strong>\u5925\u4f34\u7cfb\u7d71<\/strong>\u548c\u00a0<strong>Slub Allocator<\/strong>\uff0c\u6eff\u8db3\u5927\u584a\u548c\u5c0f\u584a\u8a18\u61b6\u9ad4\u5206\u914d\u9700\u6c42\u3002<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">\u900f\u904e<strong>\u6838\u5fc3\u9801\u8868<\/strong>\u548c<strong>\u9801\u9762\u4ea4\u63db<\/strong>\u6a5f\u5236\uff0c\u78ba\u4fdd\u865b\u64ec\u8a18\u61b6\u9ad4\u7684\u9ad8\u6548\u4f7f\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n<p class=\"ds-markdown-paragraph\">\u5728<a href=\"https:\/\/server.hk\/\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u7b49\u9ad8\u6548\u80fd\u8a08\u7b97\u74b0\u5883\u4e2d\uff0c\u9019\u4e9b\u6a5f\u5236\u4e0d\u50c5\u78ba\u4fdd\u4e86\u8a18\u61b6\u9ad4\u7684\u9ad8\u6548\u5229\u7528\uff0c\u9084\u70ba\u9ad8\u5bc6\u5ea6\u8cc7\u6599\u4e2d\u5fc3\u63d0\u4f9b\u4e86\u7a69\u5b9a\u53ef\u9760\u7684\u904b\u884c\u57fa\u790e\u3002\u900f\u904e\u7406\u89e3\u9019\u4e9b\u539f\u7406\uff0c\u7cfb\u7d71\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u597d\u5730\u6700\u4f73\u5316\u4f3a\u670d\u5668\u6548\u80fd\uff0c\u6eff\u8db3\u73fe\u4ee3\u61c9\u7528\u7684\u9700\u6c42\u3002<\/p>\n<hr \/>\n<p class=\"ds-markdown-paragraph\"><strong>\u53c3\u8003\u8cc7\u6599\uff1a<\/strong><\/p>\n<ul>\n<li>\n<p class=\"ds-markdown-paragraph\">Linux \u6838\u5fc3\u8a18\u61b6\u9ad4\u7ba1\u7406<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">Linux \u8a18\u61b6\u9ad4\u7ba1\u7406\u76f8\u95dc\u8cc7\u6599\u7d50\u69cb<\/p>\n<\/li>\n<li>\n<p class=\"ds-markdown-paragraph\">Linux \u5206\u9801\u6a5f\u5236\u6982\u8ff0<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6b63\u6587\uff1a \u672c\u6587\u5c07\u8a73\u7d30\u63a2\u8a0e Linu&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-208373","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208373","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208373"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208373\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208373"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208373"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208373"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}