块设备驱动和网络驱动已经是完全异步的了，无需为支持这种新的异步操作而做特别的事情。
Block and network drivers are already fully asynchronous, and thus there is nothing special that needs to be done to them to support the new asynchronous operations.
一个丢弃请求是此块层的一部分，提供了丢弃块的途径，并最终会导致向提供支持的AT A设备发出一个trim命令。
A discard request is part of the block layer and provides the means to discard blocks, eventually resulting in a trim command to a supporting ATA drive.
这包括辅助设备和重量所有液体由惯性块支持。
This includes accessory equipment and the weight of all liquids supported by the inertia block.
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