[Qemu-devel] Why we need unlink tb when cpu_interrupt/cpu_exit get called?

[陳韋任]

Hi all,

  I am wondering why we need to unlink tb when cpu_interrupt/cpu_exit is
called, and want to know what happened if we don't unlink tb. In theory,
QEMU want the execution flow comes back from code cache to QEMU itself
so that interrupts can be handled as soon as possible. However, I ran
linux-0.2.img with a modified QEMU whose cpu_unlink_tb does nothing.
Everything seems work fine. Is this experiment too trivial to show what
bad things happened when we don't unlink tb?

  Thanks! :)

Regards,
chenwj

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj