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程序内存地址==>虚拟内存==>物理内存 #24
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深入理解Linux虚拟内存管理的MMU机制原理
处理器内核(软核)是否带有 MMU 单元
MMU 的功能
MMU 工作原理
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硬件页表 vs 软件页表
几级页表+MMU
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页框管理
// 获得连续的页框,返回页描述符地址,是其他类型内存分配的基础
alloc_pages(gfp_mask, order);
// 获得连续的页框,返回页框对应的线性地址
// 线性地址与物理地址是内核直接映射方式
// 不能用于大于896M的高端内存
__get_free_pages(gfp_mask, order);
__free_pages(page,order);
__free_pages(addr,order); |
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