A directmemoryaddress (DMA) is normally used to transfer information directly between devices, bypassing the CPU.
一个直接的存储器位址(DMA)通常被用在装置之间直接地传递信息,省略处理器。
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The first copy (see Figure 1) is performed by the directmemory access (DMA) engine, which reads file contents from the disk and stores them into a kernel address space buffer.