linux-kernel - Re: [PATCH] UBI: new module ubiblk: block layer on top of UBI

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Message-ID: <1311833667.2169.1.camel@koala>
Date:	Thu, 28 Jul 2011 09:14:18 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	David Wagner <david.wagner@...e-electrons.com>
Cc:	linux-mtd@...ts.infradead.org, dwmw2@...radead.org,
	linux-kernel@...r.kernel.org, linux-embedded@...r.kernel.org,
	tim.bird@...sony.com
Subject: Re: [PATCH] UBI: new module ubiblk: block layer on top of UBI

On Tue, 2011-07-26 at 14:27 +0200, David Wagner wrote:
>  * The numbering of devices is much easier with ubiblk than with
>    gluebi+mtdblock_ro. With gluebi+mtdblock_ro, you get one additional
>    MTD device for each UBI volume, so the number of MTD devices grows
>    quite a lot and is a bit difficult to understand. For example,
>    mtdblock[0-4] might be your real MTD partitions, while mtdblock[5-9]
>    might be your UBI volumes.
>    It also means that if a new real MTD
>    partition is added, the number of all the MTD devices exposing UBI
>    volumes will be incremented by one, which is a bit
>    confusing/annoying.
>    As well, if you add an UBI volume, the mtdblock devices that are
>    emulated on top of volumes that come after this new one will have
>    their ID incremented.
> 
>  * The performance appears to be slightly better with ubiblk than
>    gluebi+mtdblock_ro, according to our benchmarks (see
>    http://elinux.org/Flash_Filesystem_Benchmarks_2.6.39)

Hi, I am having vacation till the middle of August and I do not have a
possibility to look at UBI/UBIFS/MTD stuff now, sorry. When I come back,
I'll go through my e-mails and respond. Apologies again.

-- 
Best Regards,
Artem Bityutskiy (Битюцкий Артём)

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