linux-kernel - Re: [PATCH 2/5] Add aix lvm partitions support files

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Message-ID: <20130524105852.GA26617@frolo.macqel>
Date:	Fri, 24 May 2013 12:58:52 +0200
From:	Philippe De Muyter <phdm@...qel.be>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Karel Zak <kzak@...hat.com>,
	Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH 2/5] Add aix lvm partitions support files

On Fri, May 24, 2013 at 06:04:52AM -0400, Christoph Hellwig wrote:
> On Tue, May 21, 2013 at 09:27:54AM +0200, Philippe De Muyter wrote:
> > AIX LVM permits to make "logical volumes" which are made of multiple slices
> > of multiple disks.  The new code allows only access to the "logical volumes"
> > which are made of one slice on the probed disk, a slice being a contiguous
> > disk area.  The code also detects "logical volumes" made of multiple slices
> > on the probed disk, but can not describe them to the partition layer, because
> > the partition layer generic code does not support that.  When such
> > non-contiguous "logical volumes" are detected, a diagnostic message is
> > printed.
> 
> This very much screams like it should be implemented in the lvm2
> userspace package using the dm kernel driver.

Is lvm2 a generic tool for discovering foreign partition layouts, or it is
about one linux-specific lvm implementation ?

Philippe
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