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Date:	Mon, 26 Oct 2009 12:35:55 +0100
From:	Jens Axboe <>
To:	Shaohua Li <>
Subject: Re: [RFC]cfq-iosched: improve hw_tag detection

On Mon, Oct 26 2009, Shaohua Li wrote:
> If active queue hasn't enough requests and idle window opens, cfq will not
> dispatch sufficient requests to hardware. In such situation, current code
> will zero hw_tag. But this is because cfq doesn't dispatch enough requests
> instead of hardware queue doesn't work. Don't zero hw_tag in such case.

Thanks, that looks like a good fix. Curious, is this fixing some
regression at your end?

Jens Axboe

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