linux-kernel - Re: [PATCH][RFC] fast file mapping for loop

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Date:	Thu, 10 Jan 2008 00:43:19 +0100
From:	devzero@....de
To:	agk@...hat.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH][RFC] fast file mapping for loop

oh, nice to see that this is still alive.

i tried this around half a year ago because i needed more than 256 loop devices and iirc, this was working quite fine.
at least i got no crashes and was able to mount and acess more than 300 iso-images with that.

shortly after, loop device was extended to handle  a larger number of loop-devices and i went that way because dm-loop was not in mainline.

i have taken a look at the wiki at http://sources.redhat.com/lvm2/wiki/DMLoop from time to time, but there didn`t seem to happen much.

were there fixes/chances since then?

do you think it`s ready for mainline?

>Here's the latest version of dm-loop, for comparison.
>
>To try it out, 
>  ln -s dmsetup dmlosetup
>and supply similar basic parameters to losetup.
>(using dmsetup version 1.02.11 or higher)
>
>Alasdair
>
>From: Bryn Reeves <breeves@...hat.com>
>
>This implements a loopback target for device mapper allowing a regular
>file to be treated as a block device.
>
>Signed-off-by: Bryn Reeves <breeves@...hat.com>
>Signed-off-by: Alasdair G Kergon <agk@...hat.com>

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