Tag bit may indicate communication interface or IO driver type.
标签位可表示通信接口或IO驱动器类型。
The ext3 filesystem driver also uses this approach and stores complete replicas of the modified blocks (either 1K, 2K, or 4K) in memory to track pending IO operations.
ext3 文件系统驱动程序也使用这种方法,存储内存中被修改的块(大小为 1K、2K 或 4K)的完整副本,以跟踪暂挂的 IO 操作。
PCI interface driver, IO port directly read, interrupt control and so on.
PCI接口驱动程序, IO 口的直接读取, 中断控制等等。
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