linux-kernel - Re: UBIFS vs Logfs (was [RFC PATCH] UBIFS

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Message-ID: <20080401105104.GE7465@logfs.org>
Date:	Tue, 1 Apr 2008 12:51:04 +0200
From:	Jörn Engel <joern@...fs.org>
To:	Artem Bityutskiy <dedekind@...dex.ru>
Cc:	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>,
	Adrian Hunter <ext-adrian.hunter@...ia.com>,
	Jan Engelhardt <jengelh@...putergmbh.de>,
	LKML <linux-kernel@...r.kernel.org>, joern@...ybastard.org
Subject: Re: UBIFS vs Logfs (was [RFC PATCH] UBIFS - new flash file system)

On Tue, 1 April 2008 12:39:25 +0300, Artem Bityutskiy wrote:
> 
> I'm not sure what you mean. In UBIFS we have lprops area, where we store
> per-LEB accounting. UBI lets it possible to have it on a fixed position.
> The accounting is a separate B-tree. Lprops area has its own independent
> garbage collector. You should probably refer the white paper for more
> information.

Fair enough.

The obvious downside of all this is depending on UBI, which has a linear
scan.  My goal was to avoid the linear scan completely.  It is a harder
goal and I haven't reached it yet.  Imo it is reachable and I will
continue going in that direction.

You picked the route of using UBI, which makes a lot of stuff easier.
It is a fair approach and I don't mind you taking it.  It has drawbacks,
but so has everything else.

Jörn

-- 
Anything that can go wrong, will.
-- Finagle's Law
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