linux-kernel - Re: [RFC PATCH] UBIFS

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Message-ID: <alpine.LFD.1.10.0804181101000.3261@apollo.tec.linutronix.de>
Date:	Fri, 18 Apr 2008 11:05:47 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Adrian Hunter <ext-adrian.hunter@...ia.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH] UBIFS - new flash file system

On Thu, 27 Mar 2008, Artem Bityutskiy wrote:
> UBIFS mount time is considerably faster as well. For example,
> In case of OLPC we observed 10-15 seconds faster boot time
> comparing to JFFS2 (fast mount, no full media check).

The mount time compared to JFFS2 on a 700MiB partition went down from
1min40s to 5sec on the same hardware. Pretty impressive
 
> UBIFS is quite complex because it is difficult to maintain
> indexing information on the flash media and be fast at the same
> time. Please, refer the UBIFS white paper for information
> about UBIFS design.

We did some initial stress tests and so far it looks pretty robust.

Great job !

Thanks,
	tglx
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