From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Thornber <thornber@redhat.com>
Subject: Re: [PATCH 8/8] [dm-cache] cache target
Date: Thu, 14 Feb 2013 13:57:03 +0000
Message-ID: <20130214135702.GA5045@Barry.lambda.co.uk>
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On Tue, Feb 12, 2013 at 04:40:40PM +0000, Alasdair G Kergon wrote:
> [Still to check the ref counting is sufficient: to understand why this is
> a bit simpler than dm-path-selector which also handles modules plugging into
> modules and went through a few iterations fixing ref problems]

dm-path-selector is more complicated because you have two 'type'
structures.  A public one and an internal (keyed on the ->name field
of the public one).