On 11/14/2011 04:04 AM, Zhi Yong Wu wrote:
>  +        co = qemu_coroutine_create(bdrv_is_allocated_co_entry);
>  +        qemu_coroutine_enter(co,&data);
Since this main process will stop within qemu_coroutine_enter() until
bdrv_is_allocated_co_entry() is completed, three lines of condition
codes below are unnecessary, right?

No, they are necessary. They are executed when bdrv_is_allocated_co_entry calls qemu_coroutine_yield.

>  +        while (!data.done) {
>  +            qemu_aio_wait();
>  +        }

Paolo


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