Re: HDAPS, Need to park the head for real

Avi Kivity
2005-08-17T07:47:18Z

Jens Axboe wrote:

>Ok, I'll give you some hints to get you started... What you really want
>to do, is:
>
>- Insert a park request at the front of the queue
>- On completion callback on that request, freeze the block queue and
> schedule it for unfreeze after a given time
>
>
>
how will this interact with command queuing? there is a danger from both
commands previously queued but not yet completed, and commands that are
queued after the park request. or is the park request a barrier?