{"id":3652,"date":"2011-12-29T11:42:44","date_gmt":"2011-12-29T03:42:44","guid":{"rendered":"http:\/\/edsionte.com\/techblog\/?p=3652"},"modified":"2012-05-05T10:06:05","modified_gmt":"2012-05-05T02:06:05","slug":"%e5%86%85%e5%ad%98%e7%ae%a1%e7%90%86%e4%b8%ad%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"http:\/\/edsionte.com\/techblog\/archives\/3652","title":{"rendered":"\u7269\u7406\u5185\u5b58\u7ba1\u7406\u4e2d\u7684\u57fa\u672c\u6570\u636e\u7ed3\u6784"},"content":{"rendered":"

Linux\u5185\u6838\u5728\u7ba1\u7406\u5185\u5b58\u65f6\u5c06\u7269\u7406\u5185\u5b58\u4ece\u903b\u8f91\u4e0a\u5212\u5206\u4e3a\u8282\u70b9\uff08node\uff09\uff0c\u5185\u5b58\u7ba1\u7406\u533a\uff08zone\uff09\uff0c\u9875\u6846\uff08frame page\uff09\u4e09\u7ea7\u7ed3\u6784\u3002\u7269\u7406\u5185\u5b58\u5148\u88ab\u5212\u5206\u4e3a\u5185\u5b58\u8282\u70b9\uff0c\u6bcf\u4e2a\u8282\u70b9\u5173\u8054\u4e00\u4e2aCPU\uff0c\u5404\u4e2a\u8282\u70b9\u53c8\u88ab\u5212\u5206\u51e0\u4e2a\u5185\u5b58\u7ba1\u7406\u533a\uff0c\u5728\u4e00\u4e2a\u5185\u5b58\u7ba1\u7406\u533a\u4e2d\u5219\u662f\u9875\u6846\u3002\u9875\u6846\u662f\u5185\u5b58\u7ba1\u7406\u7684\u57fa\u672c\u5355\u4f4d\uff0c\u5b83\u53ef\u4ee5\u5b58\u653e\u4efb\u4f55\u79cd\u7c7b\u7684\u6570\u636e\u3002\u4e0d\u8fc7\uff0c\u7531\u4e8e\u5b9e\u9645\u4e2d\u8ba1\u7b97\u673a\u786c\u4ef6\u7684\u5236\u7ea6\uff0c\u90e8\u5206\u9875\u6846\u7684\u4f7f\u7528\u53d7\u5230\u4e86\u9650\u5236\uff0c\u5185\u6838\u5c06\u5177\u6709\u76f8\u540c\u6027\u8d28\u7684\u9875\u6846\u8fdb\u884c\u5206\u7c7b\u7ec4\u7ec7\uff0c\u5373\u5f62\u6210\u5185\u5b58\u7ba1\u7406\u533a\u3002\u4e3a\u4e86\u517c\u5bb9NUMA\u67b6\u6784\u7684\u8ba1\u7b97\u673a\uff0c\u5185\u6838\u53c8\u5f15\u5165\u4e86\u8282\u70b9\u8fd9\u4e2a\u6982\u5ff5\uff0c\u6bcf\u4e2aCPU\u5bf9\u5e94\u4e00\u4e2a\u8282\u70b9\u3002<\/p>\n

1.page\u7ed3\u6784<\/h3>\n

\u5185\u6838\u4f7f\u7528page\u7ed3\u6784\u4f53\u63cf\u8ff0\u4e00\u4e2a\u7269\u7406\u9875\u6846\uff0c\u8be5\u7ed3\u6784\u4e5f\u79f0\u4e3a\u9875\u63cf\u8ff0\u7b26\uff0c\u6bcf\u4e2a\u7269\u7406\u9875\u6846\u90fd\u5173\u8054\u4e00\u4e2a\u8fd9\u6837\u7684\u7ed3\u6784\u4f53\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0cpage\u7ed3\u6784\u4ec5\u7528\u6765\u63cf\u8ff0\u4e00\u4e2a\u9875\u6846\u7684\u5c5e\u6027\uff0c\u5b83\u4e0d\u5305\u542b\u8be5\u9875\u6846\u4e2d\u7684\u4efb\u4f55\u6570\u636e\u3002\u6b64\u5916\uff0c\u8fd8\u5e94\u8be5\u533a\u5206\u9875\u6846\u5927\u5c0f\u548cpage\u7ed3\u6784\u7684\u5927\u5c0f\uff0c\u9875\u6846\u5927\u5c0f\u901a\u5e38\u4e3a4KB\uff0c\u800cpage\u7ed3\u6784\u7684\u5927\u5c0f\u5373\u4e3asizeof(struct page)\u3002<\/p>\n

\u5185\u6838\u5728\u5b9a\u4e49page\u7ed3\u6784\u65f6\u4f7f\u7528\u4e86\u8bb8\u591a\u8054\u5408\u4f53\uff0c\u8fd9\u6837\u505a\u7684\u76ee\u7684\u662f\u4fdd\u8bc1page\u7ed3\u6784\u5c3d\u53ef\u80fd\u7684\u5c0f\u3002\u867d\u7136\u6bcf\u4e2apage\u7ed3\u6784\u4f53\u5360\u5f88\u5c11\u5185\u5b58\uff0c\u4f46\u662f\u7531\u4e8e\u5b9e\u9645\u7cfb\u7edf\u4e2d\u9875\u6846\u603b\u6570\u91cf\u5de8\u5927\uff0c\u56e0\u6b64\u6240\u6709\u9875\u6846\u5bf9\u5e94\u7684page\u7ed3\u6784\u6240\u5360\u7528\u7684\u5185\u5b58\u91cf\u4e5f\u5f88\u5e9e\u5927\u3002\u4e0b\u9762\u4ec5\u5bf9\u8be5\u7ed3\u6784\u4e2d\u7684\u90e8\u5206\u5b57\u6bb5\u8fdb\u884c\u4ecb\u7ecd\u3002<\/p>\n

flags\uff1a\u5b83\u662f\u7528\u6765\u63cf\u8ff0\u9875\u6846\u72b6\u6001\u7684\u6807\u5fd7\u4f4d\uff0c\u66f4\u91cd\u8981\u7684\u662f\u8be5\u5b57\u6bb5\u7684\u9ad8\u4f4d\u5b58\u653e\u7740\u8be5\u9875\u6846\u6240\u5173\u8054\u7684\u9875\u6846\u53f7\u3001\u8282\u70b9\u5185\u7ba1\u7406\u533a\u53f7\u4ee5\u53ca\u8282\u70b9\u53f7\u3002<\/p>\n

__count:\u8868\u793a\u8be5\u9875\u7684\u5f15\u7528\u8ba1\u6570\uff0c\u5982\u679c\u8be5\u9875\u4e3a-1\uff0c\u8868\u793a\u9875\u6846\u7a7a\u95f2\uff1b\u5982\u679c\u8be5\u5b57\u6bb5\u7684\u503c\u4e3aN\uff08N>=0\uff09\uff0c\u5219\u8bf4\u660e\u6709N+1\u4e2a\u8fdb\u7a0b\u6b63\u5728\u4f7f\u7528\u8be5\u9875\u3002
\n\u7cfb\u7edf\u4e2d\u6240\u6709\u7684\u9875\u63cf\u8ff0\u7b26\u90fd\u653e\u5728mem_map\u6570\u7ec4\u4e2d\uff0c\u6bcf\u4e2a\u9875\u63cf\u8ff0\u7b26\u5728\u6570\u7ec4\u4e2d\u7684\u4e0b\u6807\u5373\u4e3a\u8be5\u63cf\u8ff0\u7b26\u5bf9\u5e94\u7269\u7406\u9875\u7684\u9875\u6846\u53f7\u3002<\/p>\n

2.zone\u7ed3\u6784<\/h3>\n

\u5185\u6838\u5c06\u6574\u4e2a\u9875\u6846\u6309\u7167\u4e0d\u540c\u7684\u8bbf\u95ee\u7279\u6027\u5212\u5206\u4e3a\u51e0\u4e2a\u533a\uff0c\u6bcf\u4e2a\u533a\u5185\u7684\u9875\u6846\u90fd\u662f\u8fde\u7eed\u7684\uff0c\u8fd9\u6837\u7684\u533a\u79f0\u4e3a\u5185\u5b58\u7ba1\u7406\u533a\u5e76\u4f7f\u7528zone\u7ed3\u6784\u6765\u63cf\u8ff0\u3002\u5185\u6838\u4e2d\u4f7f\u7528\u4e86\u4e00\u4e2a\u679a\u4e3e\u7c7b\u578b\u5bf9\u5185\u5b58\u7ba1\u7406\u533a\u7684\u7c7b\u578b\u8fdb\u884c\u5b9a\u4e49\uff1a<\/p>\n

enum zone_type {\r\n#ifdef CONFIG_ZONE_DMA\r\n\tZONE_DMA,\r\n#endif\r\n#ifdef CONFIG_ZONE_DMA32\r\n\tZONE_DMA32,\r\n#endif\r\n\tZONE_NORMAL,\r\n#ifdef CONFIG_HIGHMEM\r\n\tZONE_HIGHMEM,\r\n#endif\r\n\tZONE_MOVABLE,\r\n\t__MAX_NR_ZONES\r\n};<\/pre>\n
\u5185\u5b58\u7ba1\u7406\u533a\u662f\u4e00\u4e2a\u903b\u8f91\u4e0a\u7684\u6982\u5ff5\uff0c\u5b83\u7684\u5b58\u5728\u662f\u56e0\u4e3a\u8ba1\u7b97\u673a\u4e2d\u786c\u4ef6\u8bbf\u95ee\u7269\u7406\u5185\u5b58\u65f6\u6709\u4e00\u4e9b\u9650\u5236\u3002\u56e0\u6b64\uff0c\u6bcf\u4e2a\u5185\u5b58\u7ba1\u7406\u533a\u7684\u5b9e\u9645\u5206\u5e03\u662f\u4e0e\u4f53\u7cfb\u7ed3\u6784\u76f8\u5173\u7684\uff0c\u5177\u4f53\u5206\u5e03\u5982\u4e0b\uff1a<\/p>\n
ZONE_DMA\uff1a\u67d0\u4e9b\u8bbe\u5907\u901a\u8fc7DMA\u65b9\u5f0f\u8bbf\u95ee\u5185\u5b58\u65f6\uff0c\u4e0d\u80fd\u8bbf\u95ee\u5230\u6240\u6709\u7684\u7269\u7406\u5185\u5b58\uff0c\u6b64\u65f6\u53ea\u80fd\u4e3a\u5b83\u4eec\u5355\u72ec\u5212\u5206\u4e00\u5757\u5185\u5b58\u7ba1\u7406\u533a\u3002ZONE_DMA\u7684\u8303\u56f4\u6839\u636e\u4f53\u7cfb\u7ed3\u6784\u800c\u6539\u53d8\uff0c\u6bd4\u5982X86\u67b6\u6784\u4e0b\uff0cISA\u603b\u7ebf\u4e3a16\u4f4d\uff0c\u56e0\u6b64\u8be5\u533a\u7684\u8303\u56f4\u4e3a\u7269\u7406\u5185\u5b58\u7684\u524d16M\u3002\u4f46\u662f\uff0c\u5982\u679c\u67d0\u4e9b\u67b6\u6784\u5728\u5185\u5b58\u7684\u4efb\u4f55\u5730\u5740\u4e0a\u90fd\u53ef\u4ee5\u6267\u884cDMA\uff0c\u90a3\u4e48\u8be5\u533a\u57df\u5c31\u4e3a\u7a7a\uff0c\u5373\u957f\u5ea6\u4e3a0\u3002<\/p>\n
ZONE_DMA32\uff1a\u8be5\u533a\u7684\u4f5c\u7528\u4e0eZONE_DMA\u76f8\u540c\uff0c\u53ea\u4e0d\u8fc7\u5b83\u4ee3\u8868\u7684\u662f32\u4f4d\u53ef\u5bfb\u5740\u5e76\u9002\u5408DMA\u7684\u7269\u7406\u5185\u5b58\u533a\u57df\u300232\u4f4d\u7684\u7cfb\u7edf\u4e2d\u8be5\u533a\u57df\u7684\u957f\u5ea6\u4e3a0\uff0c\u8fd9\u79cd\u533a\u57df\u53ea\u4f1a\u51fa\u73b0\u572864\u4f4d\u7684\u7cfb\u7edf\u4e2d\u3002\u5728\u67d0\u4e9b64\u4f4d\u7684\u7cfb\u7edf\u4e2d\uff0c\u8be5\u533a\u57df\u7684\u5927\u5c0f\u53ef\u8fbe\u52304GB\u3002<\/p>\n
ZONE_NORMAL\uff1a\u8fd9\u4e2a\u533a\u57df\u5305\u542b\u7684\u90fd\u662f\u80fd\u591f\u6b63\u5e38\u6620\u5c04\u7684\u9875\u6846\u3002\u901a\u8fc7\u6e90\u7801\u4e2d\u7684\u5b9a\u4e49\u53ef\u4ee5\u53d1\u73b0\uff0c\u6240\u6709\u7684\u4f53\u7cfb\u67b6\u6784\u90fd\u5305\u542b\u8fd9\u4e2a\u533a\u57df\u3002\u4f46\u662f\u5e76\u4e0d\u662f\u6bcf\u4e2a\u67b6\u6784\u4e0b\u8be5\u533a\u90fd\u80fd\u5bf9\u5e94\u5230\u5b9e\u9645\u7684\u7269\u7406\u5185\u5b58\uff0c\u6839\u636e\u4e0a\u9762\u6240\u8ff0\uff0c\u67d0\u4e9b\u67b6\u6784\u4e0bZONE_DMA32\u4f1a\u5360\u636e\u6574\u4e2a4G\u7684\u7269\u7406\u5185\u5b58\uff0c\u56e0\u6b64\u8be5\u533a\u57df\u4e3a\u7a7a\u3002\u5728IA32\u67b6\u6784\u4e0b\u8be5\u5185\u5b58\u7ba1\u7406\u533a\u7684\u8303\u56f4\u4e3a16MB\u5230896MB\u3002<\/p>\n
ZONE_HIGHMEM\uff1a\u8fd9\u4e2a\u533a\u57df\u4ee3\u8868\u8d85\u51fa\u5185\u6838\u7a7a\u95f4\u5927\u5c0f\u7684\u7269\u7406\u5185\u5b58\uff0c\u8fd9\u90e8\u5206\u5185\u5b58\u4e5f\u88ab\u6210\u4e3a\u9ad8\u7aef\u5185\u5b58\uff08\u4e0e\u4e4b\u5bf9\u5e94ZONE_DMA\u548cZONE_NORMAL\u6210\u4e3a\u4f4e\u7aef\u5185\u5b58\uff09\u3002\u572832\u4f4d\u7684x86\u7cfb\u7edf\u4e2d\uff0c\u9ad8\u7aef\u5185\u5b58\u5373\u4e3a\u5927\u4e8e896MB\u7684\u7269\u7406\u5185\u5b58\u3002\u800c\u572864\u4f4d\u7684\u7cfb\u7edf\u4e2d\uff0c\u9ad8\u7aef\u5185\u5b58\u603b\u4e3a\u7a7a\u3002<\/p>\n
ZONE_MOVABLE\uff1a\u8fd9\u4e2a\u533a\u57df\u662f\u4e00\u4e2a\u4f2a\u5185\u5b58\u7ba1\u7406\u533a\uff0c\u5b83\u53ea\u5728\u9632\u6b62\u7269\u7406\u5185\u5b58\u788e\u7247\u673a\u5236\u4e2d\u4f7f\u7528\u3002<\/p>\n
__MAX_NR_ZONES\uff1a\u5b83\u7528\u6765\u6807\u8bb0\u5185\u5b58\u7ba1\u7406\u533a\u7684\u6570\u91cf\u3002<\/p>\n
\u5185\u5b58\u7ba1\u7406\u533a\u63cf\u8ff0\u7b26\u4e2d\u6709\u8bb8\u591a\u5b57\u6bb5\uff0c\u6709\u4e9b\u5b57\u6bb5\u7406\u89e3\u8d77\u6765\u5e76\u4e0d\u7b80\u5355\uff0c\u56e0\u6b64\u53ea\u4ecb\u7ecd\u90e8\u5206\u5b57\u6bb5\u3002<\/p>\n
watermark\uff1a\u5373\u6240\u8c13\u7684\u6c34\u5370\u503c\u6570\u7ec4\uff0c\u5b83\u4e3a\u6bcf\u4e2a\u5185\u5b58\u533a\u8bbe\u7f6e\u5408\u9002\u7684\u5185\u5b58\u6d88\u8017\u57fa\u51c6\uff0c\u8be5\u6c34\u5370\u503c\u968f\u7740\u7cfb\u7edf\u4e2d\u7684\u7a7a\u95f2\u5185\u5b58\u91cf\u800c\u53d8\u5316\u3002\u8be5\u6570\u7ec4\u5305\u542b\u4e09\u4e2a\u5143\u7d20\uff1a<\/p>\n
1).watermark[WMARK_HIGH]\uff1a\u5f53\u7cfb\u7edf\u4e2d\u7a7a\u95f2\u9875\u6846\u6570\u5927\u4e8e\u5176\u503c\u65f6\uff0c\u8868\u793a\u5f53\u524d\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\u7406\u60f3\u3002<\/p>\n
2).watermark[WMARK_LOW]\uff1a\u5982\u679c\u7a7a\u95f2\u9875\u6846\u5c0f\u4e8e\u5176\u503c\uff0c\u8868\u793a\u7a7a\u95f2\u9875\u91cf\u8f83\u5c11\uff0c\u5e94\u5f53\u6362\u51fa\u5185\u5b58\u4e2d\u90e8\u5206\u9875\u5230\u78c1\u76d8\u4e0a\u3002<\/p>\n
3).watermark[WMARK_MIN]\uff1a\u5f53\u7a7a\u95f2\u9875\u6846\u6570\u5c0f\u4e8e\u5176\u503c\u65f6\uff0c\u8868\u793a\u7cfb\u7edf\u6025\u9700\u7a7a\u95f2\u9875\u6846\u3002<\/p>\n
free_area\uff1a\u5b83\u8868\u793a\u5f53\u524d\u5185\u5b58\u7ba1\u7406\u533a\u4e2d\u7a7a\u95f2\u9875\u6846\u3002\u8be5\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u4e00\u6761\u53cc\u94fe\u8868\uff0c\u94fe\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u56fa\u5b9a\u5927\u5c0f\u7684\u8fde\u7eed\u5185\u5b58\u5757\u3002<\/p>\n
lock\uff1a\u4fdd\u62a4\u5f53\u524d\u5185\u5b58\u7ba1\u7406\u533a\u7684\u81ea\u65cb\u9501\u3002\u7531\u4e8e\u5728\u591a\u5904\u7406\u5668\u7684\u7cfb\u7edf\u4e2d\uff0c\u4f1a\u51fa\u73b0\u591a\u4e2aCPU\u540c\u65f6\u8bbf\u95ee\u4e00\u4e2a\u5185\u5b58\u7ba1\u7406\u533a\u7684\u60c5\u5f62\uff0c\u56e0\u6b64\u9700\u8981\u9501\u6765\u4fdd\u62a4\u907f\u514d\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u73b0\u8c61\u3002<\/p>\n
3.pg_data_t\u7ed3\u6784<\/h3>\n
\u8282\u70b9\u8fd9\u4e2a\u6982\u5ff5\u662f\u7531\u4e8eNUMA\uff08\u975e\u4e00\u81f4\u5185\u5b58\u8bbf\u95ee\uff09\u6a21\u578b\u800c\u8bde\u751f\u7684\uff0c\u8be5\u6a21\u578b\u53ea\u5b58\u5728\u4e8e\u591a\u5904\u7406\u5668\u8ba1\u7b97\u673a\u4e2d\u3002NUMA\u6839\u636eCPU\u6570\u91cf\u5c06\u6574\u4e2a\u7269\u7406\u5185\u5b58\u5206\u4e3a\u51e0\u4e2a\u5927\u5757\uff0c\u6bcf\u5757\u5185\u5b58\u5373\u4e3a\u6bcf\u4e2aCPU\u7684\u7684\u672c\u5730\u5185\u5b58\u3002\u8fd9\u6837\u7684\u5212\u5206\u4f7f\u6bcf\u4e2aCPU\u90fd\u80fd\u4ee5\u8f83\u5feb\u7684\u901f\u5ea6\u8bbf\u95ee\u672c\u5730\u5185\u5b58\uff0c\u5f53\u7136\u6bcf\u4e2aCPU\u4e5f\u53ef\u4ee5\u8bbf\u95ee\u5176\u4ed6CPU\u7684\u5185\u5b58\u53ea\u4e0d\u8fc7\u901f\u5ea6\u6bd4\u8f83\u6162\u800c\u5df2\u3002\u4e0a\u8ff0\u7684\u6bcf\u5757\u7269\u7406\u5185\u5b58\u5bf9\u5e94\u4e00\u4e2apg_data_t\u6570\u636e\u7ed3\u6784\uff0c\u6bcf\u5757\u7269\u7406\u5185\u5b58\u5373\u4e3a\u4e00\u4e2a\u8282\u70b9\uff0c\u6240\u4ee5\u7684\u7ed3\u70b9\u5f62\u6210\u4e00\u4e2a\u53cc\u94fe\u8868\u3002<\/p>\n
\u4e0eNUMA\u6a21\u578b\u5bf9\u5e94\u7684\u662fUMA\uff08\u4e00\u81f4\u5185\u5b58\u8bbf\u95ee\uff09\u6a21\u578b\uff0c\u8fd9\u79cd\u6a21\u578b\u5e76\u4e0d\u9700\u8981\u5c06\u7269\u7406\u5185\u5b58\u5212\u5206\u4e3a\u5757\uff0c\u56e0\u6b64\u4e5f\u5c31\u4e0d\u5b58\u5728\u8282\u70b9\u8fd9\u6837\u7684\u6982\u5ff5\u3002\u4f46\u662f\u4e3a\u4e86\u517c\u5bb9NUMA\u6a21\u5f0f\uff0cUMA\u6a21\u578b\u4e0b\u7684\u7269\u7406\u5185\u5b58\u8fd8\u662f\u5bf9\u5e94\u4e00\u4e2a\u8282\u70b9\uff0c\u4e5f\u5c31\u662f\u8bf4\u6574\u4e2a\u7269\u7406\u5185\u5b58\u5f62\u6210\u4e00\u4e2a\u8282\u70b9\uff0c\u56e0\u6b64\u4e0a\u8ff0\u7684\u8282\u70b9\u94fe\u8868\u4e2d\u4e5f\u5c31\u53ea\u6709\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n
struct bootmem_data;\r\ntypedef struct pglist_data {\r\n        struct zone node_zones[MAX_NR_ZONES];\r\n        struct zonelist node_zonelists[MAX_ZONELISTS];\r\n        int nr_zones;\r\n#ifdef CONFIG_FLAT_NODE_MEM_MAP \/* means !SPARSEMEM *\/\r\n        struct page *node_mem_map;\r\n#ifdef CONFIG_CGROUP_MEM_RES_CTLR\r\n        struct page_cgroup *node_page_cgroup;\r\n#endif\r\n#endif\r\n#ifndef CONFIG_NO_BOOTMEM\r\n        struct bootmem_data *bdata;\r\n#endif\r\n#ifdef CONFIG_MEMORY_HOTPLUG\r\n        spinlock_t node_size_lock;\r\n#endif\r\n        unsigned long node_start_pfn;\r\n        unsigned long node_present_pages; \/* total number of physical pages *\/\r\n        unsigned long node_spanned_pages; \/* total size of physical page\r\n                                             range, including holes *\/\r\n        int node_id;\r\n        wait_queue_head_t kswapd_wait;\r\n        struct task_struct *kswapd;\r\n        int kswapd_max_order;\r\n} pg_data_t;<\/pre>\n
node_zones\uff1a\u5f53\u524d\u8282\u70b9\u4e2d\u5185\u5b58\u7ba1\u7406\u533a\u63cf\u8ff0\u7b26\u6570\u7ec4\u3002\u8fd9\u4e2a\u6570\u7ec4\u7684\u5927\u5c0f\u4f7f\u7528__MAX_NR_ZONES\u6765\u5b9a\u4e49\u3002<\/p>\n
node_zonelists\uff1a\u5b83\u662fzonelist\u7ed3\u6784\u7684\u6570\u7ec4\uff0c\u957f\u5ea6\u4e3aMAX_ZONELISTS\u3002\u5982\u679c\u5185\u6838\u672a\u914d\u7f6eNUMA\uff0c\u5219\u957f\u5ea6\u4e3a1\uff0c\u5426\u5219\uff0c\u957f\u5ea6\u4e3a2\u3002\u8be5\u6570\u7ec4\u4e2d0\u53f7\u5143\u7d20\u6307\u5b9a\u4e86\u5907\u7528\u7684\u5185\u5b58\u7ba1\u7406\u533a\u94fe\u8868\uff0c\u4e5f\u5c31\u662f\u5f53\u524d\u7cfb\u7edf\u4e2d\u6240\u6709\u7684zone\u30021\u53f7\u5143\u7d20\u6307\u5b9a\u4e86\u5f53\u524d\u8282\u70b9\u4e2d\u7684\u7ba1\u7406\u533a\u94fe\u8868\u3002\u9664\u975e\u5206\u914d\u5185\u5b58\u65f6\u6307\u5b9a\u4e86GFP_THISNODE\u6807\u5fd7\u800c\u91c7\u7528\u672c\u5730\u5185\u5b58\u8282\u70b9\u4e0a\u7684zonelist\uff0c\u4e00\u822c\u5747\u91c7\u7528\u5907\u7528zonelist\u3002<\/p>\n
struct zonelist {\r\n        struct zonelist_cache *zlcache_ptr;                  \/\/ NULL or &zlcache\r\n        struct zoneref _zonerefs[MAX_ZONES_PER_ZONELIST + 1];\r\n#ifdef CONFIG_NUMA\r\n        struct zonelist_cache zlcache;                       \/\/ optional ...\r\n#endif\r\n};<\/pre>\n
zonelist\u7ed3\u6784\u4e2d\u7ba1\u7406\u533a\u94fe\u8868\u4e3b\u8981\u7531_zonerefs\u6570\u7ec4\u6765\u63cf\u8ff0\u3002
\nnr_zones\uff1a\u5f53\u524d\u8282\u70b9\u4e2d\u5185\u5b58\u7ba1\u7406\u533a\u7684\u6570\u91cf\u3002<\/p>\n
node_mem_map\uff1a\u9875\u6846\u63cf\u8ff0\u7b26\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u4e2d\u7684\u9875\u6846\u5373\u4e3a\u5f53\u524d\u8282\u70b9\u4e2d\u5305\u542b\u7684\u7269\u7406\u9875\u3002<\/p>\n
node_id\uff1a\u5f53\u524d\u8282\u70b9\u7684\u7d22\u5f15\uff0c\u7cfb\u7edf\u4e2d\u8282\u70b9\u4ece0\u5f00\u59cb\u7f16\u53f7\u3002<\/p>\n
kswapd\uff1a\u6307\u5411\u8d1f\u8d23\u8be5\u8282\u70b9\u9875\u4ea4\u6362\u7684\u5b88\u62a4\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u63cf\u8ff0\u7b26\u3002<\/p>\n
\u8fd9\u91cc\u53ea\u662f\u7b80\u5355\u7684\u4ecb\u7ecd\u4e86\u8282\u70b9\uff0c\u5185\u5b58\u7ba1\u7406\u533a\uff0c\u9875\u6846\u6240\u4ee3\u8868\u7684\u6570\u636e\u7ed3\u6784\uff0c\u8fd9\u4e09\u4e2a\u7ed3\u6784\u8d2f\u7a7f\u6574\u4e2a\u5185\u5b58\u7ba1\u7406\u7cfb\u7edf\u4e2d\uff0c\u8bb8\u591a\u5b57\u6bb5\u7684\u542b\u4e49\u4ee5\u53ca\u4f5c\u7528\u968f\u7740\u5bf9\u5185\u5b58\u7ba1\u7406\u90e8\u5206\u7684\u6df1\u5165\u5b66\u4e60\u624d\u80fd\u9010\u6e10\u52a0\u6df1\u7406\u89e3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Linux\u5185\u6838\u5728\u7ba1\u7406\u5185\u5b58\u65f6\u5c06\u7269\u7406\u5185\u5b58\u4ece\u903b\u8f91\u4e0a\u5212\u5206\u4e3a\u8282\u70b9\uff08node\uff09\uff0c\u5185\u5b58\u7ba1\u7406\u533a\uff08zone\uff09\uff0c\u9875\u6846\uff08frame  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[266],"tags":[301,300,299],"class_list":["post-3652","post","type-post","status-publish","format-standard","hentry","category-266","tag-numa","tag-300","tag-299"],"views":12728,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/3652","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=3652"}],"version-history":[{"count":0,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/3652\/revisions"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=3652"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=3652"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=3652"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}