From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joe Thornber <thornber@redhat.com>
Subject: Re: [PATCH] dm cache: fix race affecting dirty block count
Date: Fri, 1 Aug 2014 16:17:30 +0100
Message-ID: <20140801151729.GA27644@debian>
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To: Anssi Hannula <anssi.hannula@iki.fi>
Cc: Alasdair G Kergon <agk@redhat.com>, Joe Thornber <ejt@redhat.com>, dm-devel@redhat.com, stable@vger.kernel.org
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On Thu, Jul 31, 2014 at 09:31:27PM +0300, Anssi Hannula wrote:
> I did notice that after a reboot (after having incorrect nr_dirty) the
> entire cache was considered to be dirty and a full writeback occurred,
> but I don't know if that was related at all.

Did you take the cache down cleanly?  Normally this happens when you
shutdown without destroying the cache device first.

Patch looks good.

- Joe