Messages in this thread | | | Subject | Re: [PATCH RFC - TAKE TWO - 08/12] block, bfq: preserve a low latency also with NCQ-capable drives | From | Paolo Valente <> | Date | Mon, 2 Jun 2014 11:58:31 +0200 |
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Il giorno 31/mag/2014, alle ore 15:48, Tejun Heo <tj@kernel.org> ha scritto:
> 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?
By prefetching I meant just queuing more than one request (by the drive). I hope that this clarifies things a little bit.
Paolo
> > Thanks. > > -- > tejun
-- Paolo Valente Algogroup Dipartimento di Fisica, Informatica e Matematica Via Campi, 213/B 41125 Modena - Italy homepage: http://algogroup.unimore.it/people/paolo/
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