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From: Jakob Malm <jakob.malm@gmail.com>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: Boot linux from cramfs on USB
Date: Mon, 2 Apr 2012 17:33:11 +0200	[thread overview]
Message-ID: <CAFEF1dGsAF1zYw+3NDW9sq98sTTp=K9VbyOoHA1kLn2Ltx7=Eg@mail.gmail.com> (raw)
In-Reply-To: <20120402142929.GY3852@pengutronix.de>

Hi,

Thanks for your prompt reply!

Den 2 april 2012 16:29 skrev Sascha Hauer <s.hauer@pengutronix.de>:
> On Mon, Apr 02, 2012 at 03:58:49PM +0200, Jakob Malm wrote:
>> Hi,
>>
>> How would I boot a linux system in a cramfs image on USB? I don't seem
>> to be able to mount such an image:
>>
>> ...
>>
>> Is it not possible to mount a cramfs image file?
>
> cramfs currently has the limitation that it can only mount
> files which are memory mappable (that is for example nor flash).
> I never fixed this due to the lack of interest for cramfs.

Ok.

>
> That said, your setup seems a bit crazy. What is inside your cramfs? The
> kernel? You should rather put your kernel into a plain partition on the
> USB disk. Or do you only have your rootfs inside the cramfs? I rather
> recommend ext2 or ext3 for this.

The cramfs would contain the rootfs, including kernel.

I want to be able to have FAT on the disk, preferably with a single
file (possibly two), containing the kernel and rootfs, and then load
up the rootfs into memory and start the kernel with that rootfs. I
suppose I could create a command specific for our case, but it seems
like a common enough scenario to me that someone else should have done
something similar...

/Jakob

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  reply	other threads:[~2012-04-02 15:33 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-02 13:58 Jakob Malm
2012-04-02 14:29 ` Sascha Hauer
2012-04-02 15:33   ` Jakob Malm [this message]
2012-04-02 17:47     ` Sascha Hauer

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