linux-kernel - Re: [patch]cfq-iosched: delete deep seeky queue idle logic

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Date:	Tue, 27 Sep 2011 09:08:43 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Corrado Zoccolo <czoccolo@...il.com>
Cc:	Shaohua Li <shaohua.li@...el.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Jens Axboe <jaxboe@...ionio.com>,
	Maxim Patlasov <maxim.patlasov@...il.com>
Subject: Re: [patch]cfq-iosched: delete deep seeky queue idle logic

On Sun, Sep 25, 2011 at 09:34:16AM +0200, Corrado Zoccolo wrote:

[..]
> >
> > Anyway, what's wrong with the idea I suggested in other mail of expiring
> > a sync-noidle queue afer few reuqest dispatches so that it does not
> > starve other sync-noidle queues.
> I don't know the current state of the code. Are the noidle queues
> sorted in some tree, by sector number?
> If that is the case, then even an expired queue could still be in
> front of the tree.

I am not aware of any queue sorting based on sector number on sync-noidle
tree. So we should just be able to do round robin.

Thanks
Vivek
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