linux-kernel - Re: [PATCH] [RFC] UBI: Implement Fastmap support

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Date:	Fri, 01 Jun 2012 10:10:53 +0200
From:	Richard Weinberger <richard@....at>
To:	dedekind1@...il.com
CC:	Adrian Hunter <adrian.hunter@...el.com>,
	linux-mtd@...ts.infradead.org, tglx@...utronix.de,
	linux-kernel@...r.kernel.org, Heinz.Egger@...utronix.de,
	tim.bird@...sony.com
Subject: Re: [PATCH] [RFC] UBI: Implement Fastmap support

Am 01.06.2012 10:10, schrieb Artem Bityutskiy:
> On Fri, 2012-06-01 at 10:00 +0200, Richard Weinberger wrote:
>> True. But why is this a problem?
>> If we can recovers using a full scan after a power cut we are fine.
> 
> Does fastmap have zero power-cut tolerance by design?

Yes.
E.g. If the fastmap was not written corretly the CRC will not match and we fall back
to scanning. That's why fastmap tries hard to fallback to scanning if anything goes wrong.
Why should we make fastmap even more complicated than it already is?

Thanks,
//richard




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