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

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Message-ID: <4FBDF0CB.4040501@nod.at>
Date:	Thu, 24 May 2012 10:26:51 +0200
From:	Richard Weinberger <richard@....at>
To:	dedekind1@...il.com
CC:	Shmulik Ladkani <shmulik.ladkani@...il.com>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Heinz.Egger@...utronix.de, tim.bird@...sony.com, tglx@...utronix.de
Subject: Re: [PATCH] [RFC] UBI: Implement Fastmap support

On 24.05.2012 10:19, Artem Bityutskiy wrote:
>> After thinking a bit more about this case I think the best we can to
>> is
>> switching to read-only mode if ubi_update_fastmap()
>> fails.
>>
> Unless it fails because of -EIO, which means the PEB may become bad and
> you need to pick a different one and schedule the faulty one for
> torturing and marking as bad.

Wouldn't make more sense if ubi_update_fastmap() handles the -EIO case 
internally?

Currently (as of v7) both callers ubi_volume_notify() and 
ubi_wl_get_peb() check the return value of ubi_update_fastmap()
and set UBI into read-only mode if ubi_update_fastmap() fails.

Thanks,
//richard
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