linux-kernel - Re: [PATCH v2] mmc : general purpose partition support.

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Message-ID: <CACRpkdZM-F-E_RUu4JTd-1J8UeQWXiekBcnMf7Jp7m07B8SYVQ@mail.gmail.com>
Date:	Wed, 28 Sep 2011 13:21:34 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Namjae Jeon <linkinjeon@...il.com>
Cc:	cjb@...top.org, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org, awarkentin@...are.com,
	adrian.hunter@...el.com, james_p_freyensee@...ux.intel.com,
	sebras@...il.com, Ulf Hansson <Ulf.Hansson@...ricsson.com>,
	Stefan Nilsson XK <stefan.xk.nilsson@...ricsson.com>,
	Per Forlin <per.forlin@...ricsson.com>,
	johan.rudholm@...ricsson.com
Subject: Re: [PATCH v2] mmc : general purpose partition support.

On Sat, Sep 24, 2011 at 7:07 AM, Namjae Jeon <linkinjeon@...il.com> wrote:

> It allows gerneral purpose partitions in MMC Device.
> And I try to simpliy make mmc_blk_alloc_parts using mmc_part structure suggested by Andrei Warkentin.
> After patching, we can see general purpose partitions like this.
>> cat /proc/partitions
>          179 0 847872 mmcblk0
>          179 192 4096 mmcblk0gp4
>          179 160 4096 mmcblk0gp3
>          179 128 4096 mmcblk0gp2
>          179 96  1052672 mmcblk0gp1

We notice there are 32 minors between 128 and 96,
how are these allocated?

>          179 64  1024 mmcblk0boot1
>          179 32  1024 mmcblk0boot0

Does this mean that each GP-partition can contain an MBR and thus several
subpartitions so we get things like:

mmcblk0gp1p1, mmcblk0gp1p2...

?

Yours,
Linus Walleij
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