• Question 1: In xv6, one process contains only one thread. If we allow one process contains multiple thread, which state of the original PCB (process control block) should be per-thread and which should be per-process?
  
  进程和线程
  
  所以在 PCB 中的内容

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其中 Per Thread 的有：stack、PC、registers
Per Process 的有：Process state、cpu scheduling info、Momory-management info、Accounting info 和 I/O status info。