Re: [PATCH] dm snapshot: add allocated metadata to snapshot status

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Subject: Re: [PATCH] dm snapshot: add allocated metadata to snapshot status
From: Alasdair G Kergon <agk@xxxxxxxxxx>
Date: Fri, 9 Oct 2009 13:07:32 +0100
Cc: dm-devel@xxxxxxxxxx
In-reply-to: <20091009120400.GB3054@xxxxxxxxxxxxxxxxxxxxx>
Mail-followup-to: Mike Snitzer <snitzer@xxxxxxxxxx>, dm-devel@xxxxxxxxxx
Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE.
References: <1255017269-4429-1-git-send-email-snitzer@xxxxxxxxxx> <20091009114509.GA3054@xxxxxxxxxxxxxxxxxxxxx> <20091009120400.GB3054@xxxxxxxxxxxxxxxxxxxxx>
Reply-to: device-mapper development <dm-devel@xxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)

On Fri, Oct 09, 2009 at 01:04:00PM +0100, Alasdair G Kergon wrote:
> So just current_area + 3?
> (The first is 0, plus 2 for the header.)

But the header is only 1 not 2 chunks, so finally I agree, current_area + 2.

We really should get this documented...

Alasdair

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