linux-kernel - Re: [PATCH] loop file resizable

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Message-ID: <20081121101209.GJ2961@nb.net.home>
Date:	Fri, 21 Nov 2008 11:12:09 +0100
From:	Karel Zak <kzak@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	hooanon05@...oo.co.jp, tomas@...x.org,
	linux-kernel@...r.kernel.org, akinobu.mita@...il.com,
	util-linux-ng@...r.kernel.org
Subject: Re: [PATCH] loop file resizable

On Thu, Nov 20, 2008 at 01:26:54PM -0800, Andrew Morton wrote:
> Well if we're going to do this then I guess we'll need to tell the
> util-linux people about it, as users will be needing some tool with
> which to access the new fucntionality.
> 
> Presumably that would be some enhancement to losetup, or perhaps a new
> tool.  Could the util-linux people please have a think about this and
> comment?

 It shouldn't be a problem to extend the current losetup(8). I have no
 problem with this change.

> Also, I'm not sure that the user interface is terribly good.  The user
> must extend the file size and then we tell the loop driver to use all
> of the new file size.  it would be better (more flexible) to allow
> userspace to explicitly pass in the new size for the loop device.
>
> But I'm not sure that this is worth bothering about.

 I think the interface is useful and kernel side is pretty simple.

    Karel

-- 
 Karel Zak  <kzak@...hat.com>
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