linux-kernel - Re: UBI fastmap updates

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Message-ID: <4FEAB36E.4030008@nod.at>
Date:	Wed, 27 Jun 2012 09:17:02 +0200
From:	Richard Weinberger <richard@....at>
To:	"Nikita V. Youshchenko" <nyoushchenko@...sta.com>
CC:	Namjae Jeon <linkinjeon@...il.com>, linux-mtd@...ts.infradead.org,
	linux-kernel@...r.kernel.org, adrian.hunter@...el.com,
	Heinz.Egger@...utronix.de, thomas.wucher@...utronix.de,
	shmulik.ladkani@...il.com, tglx@...utronix.de,
	tim.bird@...sony.com, Marius.Mazarel@...l.ro,
	artem.bityutskiy@...ux.intel.com
Subject: Re: UBI fastmap updates

Am 27.06.2012 08:48, schrieb Nikita V. Youshchenko:
>> Would you infom me how much UBI attach time is improved with fastmap ?
> 
> I'm not Richard but still.
> 
> On board I'm currently working on, ubi attach time for 1G chip without 
> fastmap is more than 5 seconds. With fastmap, it is less than 250 
> milliseconds.

I can confirm these numbers.
On all of my boards the attach time dropped from a few seconds to
less than 500 milliseconds.
(The worst case I've seen was ~800 milliseconds)

Thanks,
//richard


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