linux-kernel - Re: [PATCH] loop: add management interface for on-demand device allocation

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Message-ID: <20110728101755.GH2622@htj.dyndns.org>
Date:	Thu, 28 Jul 2011 12:17:55 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	Jens Axboe <jaxboe@...ionio.com>, Karel Zak <kzak@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] loop: add management interface for on-demand device
 allocation

Hello, Kay.

On Tue, Jul 26, 2011 at 01:50:30PM +0200, Kay Sievers wrote:
> From: Kay Sievers <kay.sievers@...y.org>
> Subject: loop: add management interface for on-demand device allocation
> 
> Loop devices today have a fixed pre-allocated number of usually 8.
> The number can only be changed at init time. To find a free device
> to use, /dev/loop%i needs to be scanned and all devices need to be
> opened.

It generally looks good to me but I really hope it were split into
multiple patches.  I think it's a bit too big and doing too many
different things.  Can you please split it up?

> +static int loop_lookup(struct loop_device **lo, int nr);
> +static int loop_add(struct loop_device **lo, int nr);

Also, can't these return loop_device * and ERR_PTR() value on errors?

Thanks.

-- 
tejun
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