Discard-Request 丢弃请求
The Linux block layer component of this is called a discard request, which results from a higher-level file system file deletion.
Linux的这个块层组件称为丢弃请求，它来自于更高级别的文件系统的文件删除。
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.
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。
Initialize request - the transaction layer must discard all pending transactions and start accepting link or application layer requests.
初始化请求-事务处理层必须丢弃所有未决处理并开始接受连接和应用层请求。
应用推荐