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[dm-devel] Re: IO scheduler based IO controller V10
- From: Jens Axboe <jens axboe oracle com>
- To: Mike Galbraith <efault gmx de>
- Cc: dhaval linux vnet ibm com, peterz infradead org, dm-devel redhat com, dpshah google com, agk redhat com, balbir linux vnet ibm com, paolo valente unimore it, jmarchan redhat com, fernando oss ntt co jp, Ulrich Lukas <stellplatz-nr 13a datenparkplatz de>, mikew google com, jmoyer redhat com, nauman google com, mingo elte hu, Vivek Goyal <vgoyal redhat com>, m-ikeda ds jp nec com, riel redhat com, lizf cn fujitsu com, fchecconi gmail com, containers lists linux-foundation org, linux-kernel vger kernel org, akpm linux-foundation org, righi andrea gmail com, torvalds linux-foundation org
- Subject: [dm-devel] Re: IO scheduler based IO controller V10
- Date: Fri, 2 Oct 2009 20:08:57 +0200
On Thu, Oct 01 2009, Mike Galbraith wrote:
> max_dispatch = cfqd->cfq_quantum;
> if (cfq_class_idle(cfqq))
> max_dispatch = 1;
>
> + if (cfqd->busy_queues > 1)
> + cfqd->od_stamp = jiffies;
> +
->busy_queues > 1 just means that they have requests ready for dispatch,
not that they are dispatched.
--
Jens Axboe
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