**\u5f15\u8a00**
\nLinux \u7684\u8a18\u61b6\u9ad4\u7ba1\u7406\u6a5f\u5236\u662f\u4f5c\u696d\u7cfb\u7d71\u8a2d\u8a08\u4e2d\u7684\u95dc\u9375\u90e8\u5206\uff0c\u78ba\u4fdd\u7a0b\u5f0f\u80fd\u5920\u9ad8\u6548\u3001\u5b89\u5168\u5730\u4f7f\u7528\u8a18\u61b6\u9ad4\u8cc7\u6e90\u3002\u672c\u5831\u544a\u5c07\u8a73\u7d30\u63a2\u8a0e Linux \u8a18\u61b6\u9ad4\u7ba1\u7406\u7684\u5404\u500b\u65b9\u9762\uff0c\u5305\u62ec MMU \u7684\u4f5c\u7528\u3001\u4f4d\u5740\u7a7a\u9593\u7684\u7d44\u7e54\u3001\u8a18\u61b6\u9ad4\u5206\u914d\u7b56\u7565\uff08\u5982\u5925\u4f34\u7cfb\u7d71\u548c slab \u5206\u914d\u5668\uff09\u4ee5\u53ca\u6838\u5fc3\u8a18\u61b6\u9ad4\u7ba1\u7406\u7684\u5177\u9ad4\u5be6\u73fe\u3002<\/p>\n
**1. \u8a18\u61b6\u9ad4\u7ba1\u7406\u55ae\u5143 (MMU) \u8207\u4f4d\u5740\u7ffb\u8b6f**
\nMMU \u662f CPU \u7684\u4e00\u90e8\u5206\uff0c\u8ca0\u8cac\u5c07\u7a0b\u5f0f\u4f7f\u7528\u7684\u865b\u64ec\u4f4d\u5740\u6620\u5c04\u5230\u5be6\u969b\u7684\u5be6\u9ad4\u4f4d\u5740\u3002\u9019\u4e00\u904e\u7a0b\u5728 x86 \u9ad4\u7cfb\u7d50\u69cb\u4e0b\u900f\u904e\u5206\u6bb5\u548c\u5206\u9801\u6a5f\u5236\u5be6\u73fe\u3002<\/p>\n
– **\u5206\u6bb5\u6a5f\u5236**\uff1aCPU \u751f\u6210\u908f\u8f2f\u4f4d\u5740\uff0c\u900f\u904e\u5206\u6bb5\u55ae\u5143\u8f49\u63db\u70ba\u7dda\u6027\u4f4d\u5740\u3002\u5206\u6bb5\u5141\u8a31\u884c\u7a0b\u7684\u5be6\u9ad4\u4f4d\u5740\u7a7a\u9593\u662f\u975e\u9023\u7e8c\u7684\uff0c\u9019\u70ba\u8a18\u61b6\u9ad4\u7ba1\u7406\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u3002\u4e00\u500b\u6bb5\u7531\u57fa\u5e95\u4f4d\u5740\u3001\u754c\u9650\uff08\u9577\u5ea6\uff09\u548c\u985e\u578b\u5b9a\u7fa9\uff0c\u985e\u578b\u6c7a\u5b9a\u6bb5\u662f\u5426\u53ef\u8b80\u3001\u53ef\u5beb\u7b49\u5c6c\u6027\u3002
\n– **\u5206\u9801\u6a5f\u5236**\uff1a\u7dda\u6027\u4f4d\u5740\u9032\u4e00\u6b65\u900f\u904e\u5206\u9801\u55ae\u5143\u6620\u5c04\u5230\u5be6\u9ad4\u4f4d\u5740\u3002\u5206\u9801\u6a5f\u5236\u7684\u95dc\u9375\u512a\u52e2\u662f\u907f\u514d\u5916\u90e8\u788e\u7247\uff08\u5373\u8a18\u61b6\u9ad4\u5340\u584a\u4e4b\u9593\u7684\u7a7a\u9699\uff09\uff0c\u56e0\u70ba\u5b83\u5141\u8a31\u8a18\u61b6\u9ad4\u4ee5\u56fa\u5b9a\u5927\u5c0f\u7684\u9801\uff08\u901a\u5e38 4KB\uff09\u70ba\u55ae\u4f4d\u5206\u914d\u3002
\n– **\u5206\u9801\u6a21\u578b**\uff1a\u5728 x86 \u4e2d\uff0cMMU \u652f\u63f4\u591a\u7d1a\u5206\u9801\uff1a
\n– 32 \u4f4d\u5143\u7cfb\u7d71\uff1a2 \u7d1a\u5206\u9801\uff08\u9801\u76ee\u9304\u548c\u9801\u8868\uff09\uff0c\u6bcf\u500b\u9801\u76ee\u9304\u9805\u6307\u5411\u9801\u8868\uff0c\u6bcf\u500b\u9801\u8868\u9805\u6307\u5411 4KB \u7684\u5be6\u9ad4\u9801\u3002
\n– 32 \u4f4d\u5143\u7cfb\u7d71\u958b\u555f\u5be6\u9ad4\u4f4d\u5740\u64f4\u5c55 (PAE)\uff1a3 \u7d1a\u5206\u9801\u3002
\n– 64 \u4f4d\u5143\u7cfb\u7d71\uff1a4 \u7d1a\u5206\u9801\u3002
\n– **\u63a7\u5236\u66ab\u5b58\u5668**\uff1a\u5206\u9801\u6a5f\u5236\u7531 CR0 \u66ab\u5b58\u5668\u7684 PG \u4f4d\u5143\u555f\u7528\uff08PG=1 \u8868\u793a\u555f\u7528\uff0cPG=0 \u7981\u7528\uff0c\u6b64\u6642\u7dda\u6027\u4f4d\u5740\u76f4\u63a5\u4f5c\u70ba\u5be6\u9ad4\u4f4d\u5740\uff09\u3002CR3 \u66ab\u5b58\u5668\u5132\u5b58\u9801\u76ee\u9304\u8868\u7684\u5be6\u9ad4\u4f4d\u5740\uff0c\u9801\u76ee\u9304\u8868\u7e3d\u662f\u4ee5 4KB \u70ba\u908a\u754c\u5c0d\u9f4a\uff0c\u56e0\u6b64 CR3 \u7684\u4f4e 12 \u4f4d\u5143\u901a\u5e38\u70ba 0\u3002CR2 \u5132\u5b58\u6700\u5f8c\u4e00\u6b21\u9801\u932f\u8aa4\u7684\u7dda\u6027\u4f4d\u5740\uff0cCR4 \u7528\u65bc\u8655\u7406\u865b\u64ec 8086 \u6a21\u5f0f\u7b49\u529f\u80fd\u3002<\/p>\n
**2. Linux \u4e2d\u7684\u5206\u6bb5\u8207\u5206\u9801**
\n\u5728 Linux \u4e2d\uff0c\u5206\u6bb5\u6a5f\u5236\u4e26\u672a\u88ab\u5145\u5206\u5229\u7528\u3002\u5168\u57df\u63cf\u8ff0\u7b26\u8868 (GDT) \u5b9a\u7fa9\u4e86\u5e7e\u500b\u6bb5\uff08\u5982\u6838\u5fc3\u7a0b\u5f0f\u78bc\u6bb5\u3001\u8cc7\u6599\u6bb5\u548c\u4f7f\u7528\u8005\u6bb5\uff09\uff0c\u4f46\u9019\u4e9b\u6bb5\u7684\u57fa\u5e95\u4f4d\u5740\u5747\u70ba 0\uff0c\u754c\u9650\u70ba 4GB\u3002\u9019\u610f\u5473\u8457 Linux \u5be6\u969b\u4e0a\u53ea\u4f7f\u7528\u4e86\u4e00\u500b\u6bb5\uff0c\u7a0b\u5f0f\u4e2d\u7684\u865b\u64ec\u4f4d\u5740\u76f4\u63a5\u7b49\u65bc\u7dda\u6027\u4f4d\u5740\u3002<\/p>\n
– Linux \u4e3b\u8981\u4f9d\u8cf4\u5206\u9801\u6a5f\u5236\u4f86\u7ba1\u7406\u8a18\u61b6\u9ad4\u3002\u900f\u904e 4 \u7d1a\u5206\u9801\u6a21\u578b\uff0cLinux \u76f8\u5bb9\u4e86 32 \u4f4d\u5143\u300164 \u4f4d\u5143\u7cfb\u7d71\u53ca\u5176 PAE \u64f4\u5c55\u60c5\u6cc1\u3002\u4f8b\u5982\uff0c\u5728 32 \u4f4d\u5143\u7cfb\u7d71\u4e2d\uff0c\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\u5206\u70ba\u4f7f\u7528\u8005\u614b\uff080-3GB\uff09\u548c\u6838\u5fc3\u614b\uff083GB-4GB\uff09\uff0c\u800c\u5206\u9801\u78ba\u4fdd\u4e86\u4f4d\u5740\u6620\u5c04\u7684\u9748\u6d3b\u6027\u3002
\n– \u884c\u7a0b\u7684\u4f4d\u5740\u7a7a\u9593\u7531 `mm_struct` \u7d50\u69cb\u63cf\u8ff0\uff0c\u6bcf\u500b\u884c\u7a0b\u53ea\u6709\u4e00\u500b `mm_struct`\u3002\u6838\u5fc3\u614b\u662f\u5171\u4eab\u7684\uff0c\u4e0d\u6703\u89f8\u767c\u7f3a\u9801\u4e2d\u65b7\u6216\u5b58\u53d6\u4f7f\u7528\u8005\u7a7a\u9593\uff0c\u56e0\u6b64\u6838\u5fc3\u57f7\u884c\u7dd2\u7684 `task_struct->mm` \u70ba NULL\u3002<\/p>\n
**3. Linux \u7684\u8a18\u61b6\u9ad4\u5206\u914d\u8207\u7ba1\u7406**
\nLinux \u70ba\u6bcf\u500b\u884c\u7a0b\u5206\u914d\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\uff0c\u5176\u5927\u5c0f\u548c\u7d44\u7e54\u65b9\u5f0f\u53d6\u6c7a\u65bc\u9ad4\u7cfb\u7d50\u69cb\u3002\u5728 32 \u4f4d\u5143 x86 \u7cfb\u7d71\u4e0b\uff0c\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\u70ba 0-4GB\uff0c\u5177\u9ad4\u5283\u5206\u5982\u4e0b\uff1a<\/p>\n
| \u4f4d\u5740\u7bc4\u570d | \u7528\u9014 |
\n|———————|—————————————|
\n| 0-3GB | \u4f7f\u7528\u8005\u614b\u7a7a\u9593\uff0c\u7528\u65bc\u4f7f\u7528\u8005\u7a0b\u5f0f |
\n| 3GB-3GB+896MB | \u6838\u5fc3\u614b\uff0c\u76f4\u63a5\u6620\u5c04\u5be6\u9ad4\u8a18\u61b6\u9ad4 0-896MB |
\n| 3GB+896MB-4GB | vmalloc \u5340\u57df\uff0c\u7528\u65bc\u6838\u5fc3\u6620\u5c04\u9ad8\u968e\u8a18\u61b6\u9ad4 |<\/p>\n
– **\u5be6\u9ad4\u8a18\u61b6\u9ad4\u5206\u5272\u69fd**\uff1a
\n– **ZONE_DMA\uff080-16MB\uff09**\uff1a\u5c08\u70ba DMA\uff08\u76f4\u63a5\u8a18\u61b6\u9ad4\u5b58\u53d6\uff09\u88dd\u7f6e\u4f7f\u7528\uff0c\u56e0\u70ba DMA \u4e0d\u7d93\u904e MMU\uff0c\u9700\u8981\u9023\u7e8c\u7684\u5be6\u9ad4\u4f4d\u5740\u7de9\u885d\u5340\u3002
\n– **ZONE_NORMAL\uff0816MB-896MB\uff09**\uff1a\u6838\u5fc3\u53ef\u4ee5\u76f4\u63a5\u5b58\u53d6\u7684\u5e38\u898f\u8a18\u61b6\u9ad4\u3002
\n– **ZONE_HIGHMEM\uff08896MB \u4ee5\u4e0a\uff09**\uff1a\u9ad8\u968e\u8a18\u61b6\u9ad4\uff0c\u6838\u5fc3\u7121\u6cd5\u76f4\u63a5\u5b58\u53d6\uff0c\u9700\u8981\u900f\u904e vmalloc \u6216\u5176\u4ed6\u6620\u5c04\u6a5f\u5236\u3002
\n– **\u9801\u8868\u5206\u914d**\uff1a
\n– \u6838\u5fc3\u9801\u8868\u5728\u7cfb\u7d71\u555f\u52d5\u6642\u900f\u904e `paging_init` \u51fd\u5f0f\u5b8c\u6210\uff0c\u5c07 ZONE_DMA \u548c ZONE_NORMAL \u7684\u5be6\u9ad4\u9801\u9762\u8207\u865b\u64ec\u4f4d\u5740 3GB-3GB+896MB \u76f4\u63a5\u6620\u5c04\u3002
\n– \u4f7f\u7528\u8005\u614b\u548c\u6838\u5fc3\u9ad8\u968e\u4f4d\u5740\u900f\u904e MMU \u4fee\u6539\u865b\u64ec\u4f4d\u5740\u8207\u5be6\u9ad4\u4f4d\u5740\u7684\u6620\u5c04\u95dc\u4fc2\uff0c\u4e26\u6e05\u9664\u9801\u8868\u5feb\u53d6\u3002<\/p>\n
**4. \u5925\u4f34\u7cfb\u7d71**
\n\u5925\u4f34\u7cfb\u7d71\u662f Linux \u7528\u4f86\u7ba1\u7406\u5be6\u9ad4\u8a18\u61b6\u9ad4\u7684\u6a5f\u5236\uff0c\u65e8\u5728\u89e3\u6c7a\u983b\u7e41\u5206\u914d\u548c\u91cb\u653e\u8a18\u61b6\u9ad4\u5c0e\u81f4\u7684\u5916\u90e8\u788e\u7247\u554f\u984c\u3002\u5916\u90e8\u788e\u7247\u662f\u6307\u8a18\u61b6\u9ad4\u4e2d\u5206\u6563\u7684\u5c0f\u584a\u7a7a\u9592\u7a7a\u9593\uff0c\u7121\u6cd5\u6eff\u8db3\u5927\u584a\u8a18\u61b6\u9ad4\u8acb\u6c42\u3002<\/p>\n
– **\u539f\u7406**\uff1a\u5925\u4f34\u7cfb\u7d71\u5c07\u5be6\u9ad4\u8a18\u61b6\u9ad4\u5206\u6210\u4e0d\u540c\u5927\u5c0f\u7684\u5340\u584a\uff0c\u6eff\u8db3\u4ee5\u4e0b\u689d\u4ef6\uff1a
\n– \u5340\u584a\u5927\u5c0f\u76f8\u540c\u3002
\n– \u5be6\u9ad4\u4f4d\u5740\u9023\u7e8c\u3002
\n– \u5169\u500b\u6eff\u8db3\u689d\u4ef6\u7684\u5340\u584a\u7a31\u70ba\u300c\u5925\u4f34\u300d\uff0c\u53ef\u4ee5\u5408\u4f75\u6210\u66f4\u5927\u7684\u5340\u584a\u3002
\n– **\u5be6\u73fe**\uff1aLinux \u7dad\u8b77 11 \u500b\u5340\u584a\u93c8\u7d50\u4e32\u5217\uff0c\u6bcf\u500b\u4e32\u5217\u5c0d\u61c9 2^0 \u5230 2^11 \u500b\u9801\uff084KB \u5230 4MB\uff09\u7684\u5340\u584a\u3002\u4f8b\u5982\uff0c\u6700\u5927\u8acb\u6c42\u70ba 1024 \u9801\uff0c\u5c0d\u61c9 4MB \u9023\u7e8c RAM \u5340\u584a\u3002\u6bcf\u500b\u5340\u584a\u7684\u8d77\u59cb\u4f4d\u5740\u662f\u5176\u5927\u5c0f\u7684\u6574\u6578\u500d\uff0c\u5982 16 \u9801\u5340\u584a\u7684\u8d77\u59cb\u4f4d\u5740\u70ba 16\u00d74KB \u7684\u500d\u6578\u3002
\n– **\u521d\u59cb\u5316**\uff1a\u7cfb\u7d71\u555f\u52d5\u6642\uff0c\u6240\u6709\u5be6\u9ad4\u8a18\u61b6\u9ad4\u91cb\u653e\u5230\u5925\u4f34\u7cfb\u7d71\u4e2d\uff0c\u6bcf\u500b\u8a18\u61b6\u9ad4\u7bc0\u9ede\u7dad\u8b77 per-CPU \u5feb\u53d6\uff0c\u7528\u65bc\u8655\u7406\u55ae\u9801\u5206\u914d\u3002\u5206\u914d\u548c\u91cb\u653e\u900f\u904e\u5925\u4f34\u6f14\u7b97\u6cd5\u5be6\u73fe\uff0c\u76e1\u91cf\u5408\u4f75\u5c0f\u584a\u70ba\u7a7a\u9592\u5927\u584a\uff0c\u6e1b\u5c11\u788e\u7247\u3002<\/p>\n
**5. slab \u5206\u914d\u5668**
\nslab \u5206\u914d\u5668\u662f Linux \u7528\u4f86\u7ba1\u7406\u5c0f\u8a18\u61b6\u9ad4\u7269\u4ef6\u7684\u6a5f\u5236\uff0c\u65e8\u5728\u6e1b\u5c11\u5167\u90e8\u788e\u7247\uff08\u5373\u9801\u5167\u672a\u5145\u5206\u5229\u7528\u7684\u7a7a\u9593\uff09\u3002\u5b83\u662f\u8a18\u61b6\u9ad4\u9810\u5206\u914d\u7684\u4e00\u7a2e\u65b9\u5f0f\uff0c\u72a7\u7272\u7a7a\u9593\u63db\u53d6\u6642\u9593\u6548\u7387\uff0c\u5047\u8a2d\u5206\u914d\u7684\u8a18\u61b6\u9ad4\u5340\u584a\u6bd4\u9801\u5c0f\u3002<\/p>\n
– **\u8a2d\u8a08\u601d\u60f3**\uff1a\u5c07\u82e5\u5e72\u9801\u7d44\u5408\u6210\u4e00\u500b slab\uff0c\u6bcf\u500b slab \u53ea\u5132\u5b58\u540c\u4e00\u985e\u8cc7\u6599\uff08\u5982\u6838\u5fc3\u7269\u4ef6\uff09\u3002\u9019\u6a23\uff0cslab \u5167\u90e8\u4ee5\u7269\u4ef6\u5927\u5c0f\u70ba\u5206\u914d\u7c92\u5ea6\uff0c\u6e1b\u5c11\u9801\u5167\u788e\u7247\u3002\u591a\u500b\u5132\u5b58\u540c\u985e\u8cc7\u6599\u7684 slab \u7d44\u6210\u4e00\u500b\u5feb\u53d6\uff08cache\uff0c\u8207\u786c\u9ad4\u5feb\u53d6\u7121\u95dc\uff09\u3002
\n– **\u72c0\u614b**\uff1aslab \u6709\u4e09\u7a2e\u72c0\u614b\uff1a
\n– **slabs_full**\uff1a\u5b8c\u5168\u5206\u914d\u3002
\n– **slabs_free**\uff1a\u5b8c\u5168\u7a7a\u9592\uff0c\u53ef\u5206\u914d\u3002
\n– **slabs_partial**\uff1a\u90e8\u5206\u5206\u914d\u3002
\n– **\u512a\u9ede**\uff1a
\n– \u6e1b\u5c11\u788e\u7247\uff0c\u5c24\u5176\u9069\u5408\u983b\u7e41\u5206\u914d\u7684\u5c0f\u7269\u4ef6\uff08\u5982\u6838\u5fc3\u8cc7\u6599\u7d50\u69cb\uff09\u3002
\n– \u652f\u63f4\u7269\u4ef6\u521d\u59cb\u5316\uff0c\u907f\u514d\u91cd\u8907\u521d\u59cb\u5316\u958b\u92b7\u3002
\n– \u652f\u63f4\u786c\u9ad4\u5feb\u53d6\u5c0d\u9f4a\u548c\u8457\u8272\uff0c\u63d0\u9ad8\u5feb\u53d6\u5229\u7528\u7387\u548c\u6548\u80fd\u3002
\n– **\u7f3a\u9ede**\uff1a
\n– \u7ba1\u7406\u8907\u96dc\uff0c\u6d89\u53ca\u591a\u500b\u4f47\u5217\uff08\u5982\u8655\u7406\u5668\u672c\u5730\u5feb\u53d6\u4f47\u5217\u3001slab \u7a7a\u9592\u4f47\u5217\uff09\u3002
\n– \u5132\u5b58\u958b\u92b7\u5927\uff0c\u6bcf\u500b slab \u9700\u8981 `struct slab` \u8cc7\u6599\u7d50\u69cb\u548c `kmem_bufctl_t` \u9663\u5217\u7ba1\u7406\u7269\u4ef6\u3002\u7576\u7269\u4ef6\u9ad4\u7a4d\u5c0f\uff08\u5982 32 \u4f4d\u5143\u7d44\uff09\u6642\uff0c\u9663\u5217\u53ef\u80fd\u6d6a\u8cbb 1\/8 \u7a7a\u9593\u3002
\n– \u7de9\u885d\u5340\u56de\u6536\u548c\u6548\u80fd\u8abf\u6821\u8f03\u8907\u96dc\u3002<\/p>\n
**6. \u6838\u5fc3\u614b\u8a18\u61b6\u9ad4\u7ba1\u7406**
\nLinux \u6838\u5fc3\u900f\u904e `kmalloc` \u548c `vmalloc` \u51fd\u5f0f\u7ba1\u7406\u8a18\u61b6\u9ad4\u5206\u914d\uff0c\u57fa\u65bc\u4e4b\u524d\u7684\u5925\u4f34\u7cfb\u7d71\u548c slab \u5206\u914d\u5668\u3002<\/p>\n
– **kmalloc**\uff1a
\n– \u7528\u65bc\u7533\u8acb\u9023\u7e8c\u5be6\u9ad4\u4f4d\u5740\u7684\u8a18\u61b6\u9ad4\uff0c\u9069\u5408\u5c0f\u584a\u8a18\u61b6\u9ad4\u5206\u914d\u3002
\n– \u57fa\u65bc slab \u5206\u914d\u5668\u5be6\u73fe\uff0c\u547c\u53eb\u904e\u7a0b\u70ba `kmalloc -> __kmalloc -> __do_kmalloc`\uff0c\u4e3b\u8981\u6b65\u9a5f\uff1a
\n1. \u900f\u904e `kmalloc_slab` \u627e\u5230\u5408\u9069\u7684 `kmem_cache` \u5feb\u53d6\u3002
\n2. \u900f\u904e `slab_alloc` \u5411 slab \u5206\u914d\u5668\u7533\u8acb\u7269\u4ef6\u8a18\u61b6\u9ad4\u3002
\n– **vmalloc**\uff1a
\n– \u7528\u65bc\u7533\u8acb\u9023\u7e8c\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\uff0c\u4f46\u5be6\u9ad4\u8a18\u61b6\u9ad4\u4e0d\u4e00\u5b9a\u9023\u7e8c\u3002
\n– \u547c\u53eb\u904e\u7a0b\u70ba `vmalloc -> __vmalloc_node_flags -> __vmalloc_node -> __vmalloc_node_range`\uff0c\u4e3b\u8981\u6b65\u9a5f\uff1a
\n1. \u900f\u904e `__get_vm_area_node` \u5206\u914d\u865b\u64ec\u4f4d\u5740\u7a7a\u9593\u3002
\n2. \u900f\u904e `alloc_pages` \u4e00\u9801\u4e00\u9801\u7533\u8acb\u5be6\u9ad4\u8a18\u61b6\u9ad4\uff0c\u4e26\u70ba\u865b\u64ec\u4f4d\u5740\u5206\u914d\u9801\u8868\u6620\u5c04\u3002<\/p>\n
**\u7d50\u8ad6**
\nLinux \u7684\u8a18\u61b6\u9ad4\u7ba1\u7406\u6a5f\u5236\u900f\u904e MMU\u3001\u5206\u9801\u3001\u5925\u4f34\u7cfb\u7d71\u548c slab \u5206\u914d\u5668\u7b49\u5143\u4ef6\uff0c\u5be6\u73fe\u4e86\u9ad8\u6548\u7684\u8a18\u61b6\u9ad4\u5206\u914d\u548c\u7ba1\u7406\u3002MMU \u8ca0\u8cac\u4f4d\u5740\u7ffb\u8b6f\uff0c\u5206\u9801\u6a5f\u5236\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u8a18\u61b6\u9ad4\u6620\u5c04\uff0c\u5925\u4f34\u7cfb\u7d71\u89e3\u6c7a\u4e86\u5916\u90e8\u788e\u7247\u554f\u984c\uff0c\u800c slab \u5206\u914d\u5668\u5247\u6e1b\u5c11\u4e86\u5167\u90e8\u788e\u7247\u3002\u6838\u5fc3\u900f\u904e `kmalloc` \u548c `vmalloc` \u51fd\u5f0f\u7ba1\u7406\u81ea\u5df1\u7684\u8a18\u61b6\u9ad4\u7a7a\u9593\uff0c\u78ba\u4fdd\u4e86\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6548\u80fd\u3002<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
**\u5f15\u8a00** Linux \u7684\u8a18\u61b6...<\/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-208365","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208365","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=208365"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208365\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208365"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208365"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}