| 摘要 |
Transferring data between a requesting program and a hardware device. An program requests a pre-allocation of non-pageable memory. The program requests a transfer via a direct memory access (DMA) from the hardware device into the non-pageable memory. The requesting program is notified when the DMA is complete. The requesting program reads the data from the non-pageable memory. A determination may be made whether a range of addresses specified in the DMA request is within the pre-allocated range of non-pageable memory. If the range of addresses is within the pre-allocated non-pageable memory, the data transfer involves fewer transfers between system memory and the CPU than if the range of addresses is outside the pre-allocated non-pageable memory.
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