linux-kernel - Re: [PATCH 00/22 take 3] UBI: Unsorted Block Images

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Date:	Tue, 20 Mar 2007 17:14:10 +0200
From:	Artem Bityutskiy <dedekind@...radead.org>
To:	Theodore Tso <tytso@....edu>
Cc:	Matt Mackall <mpm@...enic.com>,
	Josh Boyer <jwboyer@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Frank Haverkamp <haver@...t.ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH 00/22 take 3] UBI: Unsorted Block Images

On Tue, 2007-03-20 at 09:52 -0400, Theodore Tso wrote:
> It would also help people understand why there are so many "units" in
> UBI, since hopefully the high-level documentation would explain why
> they fit together, and perhaps why some of the units weren't folded
> together.  What value do they add as separate components?

Teo, the units will go away. I'll leave only 4 of them:

1. I/O, just to hide some I/O related complexities.
2. Scanning: just because I am planning to add other device attaching
methods, without scanning.
3. Wear-leveling, just because I want to improve the algorithm in
future. Changing algorithm means changing data structures. So I want to
keeps them separate.
4. EBA - because I want to keep all mapping-related stuff in one place.
Well, this does not have to be called unit, just mapping-related code in
on file. Also, long-term is to have the table on-flash (currently it is
in-ram which does not scale well).

Everything else will be folded together. No itsy-bitsy. I've almost
finished this re-structuring, doing bug-fixing.

P.S.: I'll let other folks to comment the other stuff.

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)

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