Re: HDAPS, Need to park the head for real

[Avi Kivity]

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?
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