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

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Message-ID: <20130524100452.GA15570@infradead.org>
Date:	Fri, 24 May 2013 06:04:52 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Philippe De Muyter <phdm@...qel.be>
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 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.

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