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

Artem Bityutskiy
2011-07-28T06:14:36Z

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)