Re: [Qemu-trivial] [Qemu-devel] [PULL 14/46] cpu-exec: drop dead assignment

[Paolo Bonzini]

On 10/02/2015 10:15, Peter Maydell wrote:
> > -                        tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK);
> >                          next_tb = 0;
> >                          break;
> >                      case TB_EXIT_ICOUNT_EXPIRED:
>
> True, I guess, but presumably this means we're doing unnecessary
> work in the next time round the loop re-finding the tb which we
> already had...

This is the TB_EXIT_REQUESTED case though: once the iothread runs who
knows what happens.  You might get an interrupt or a system reset that
diverts execution away from tb.

Paolo