linux-kernel - Re: [PATCH] cfq-iosched: no need to keep track of busy_rt

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Date:	Fri, 10 Jul 2009 10:18:51 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Divyesh Shah <dpshah@...gle.com>,
	Moyer Jeff Moyer <jmoyer@...hat.com>
Subject: Re: [PATCH] cfq-iosched: no need to keep track of busy_rt_queues

On Thu, Jul 09 2009, Vivek Goyal wrote:
> Resending as had forgotten to put "[PATCH]" in subject line.
> 
> o Get rid of busy_rt_queues infrastructure. Looks like it is redundant.
> 
> o Once an RT queue gets request it will preempt any of the BE or IDLE queues
>   immediately. Otherwise this queue will be put on service tree and scheduler
>   will anyway select this queue before any of the BE or IDLE queue. Hence
>   looks like there is no need to keep track of how many busy RT queues are
>   currently on service tree. 

Looks good, I'll queue this up for 2.6.32.

-- 
Jens Axboe

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