Re: [PATCH RFC - TAKE TWO - 08/12] block, bfq: preserve a low latency also with NCQ-capable drives

[Tejun Heo]

On Thu, May 29, 2014 at 11:05:39AM +0200, Paolo Valente wrote:
> This patch addresses this issue by not disabling device idling for

This patch addresses this issue by allowing device idling for...

> weight-raised queues, even if the device supports NCQ. This allows BFQ
> to start serving a new queue, and therefore allows the drive to

This disallows BFQ to start serving a new queue, and therefore the
drive to prefetch new requests, until the idling timeout expires.

Prefetch?  Can you elaborate?

Thanks.

-- 
tejun
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