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Message-ID: <07cd01c18401$fa397db0$5601010a@prefect>
From: "Bradley D. LaRonde" <brad@ltc.com>
To: <root@chaos.analogic.com>
Cc: "Thomas Capricelli" <orzel@kde.org>, <linux-kernel@vger.kernel.org>
In-Reply-To: <Pine.LNX.3.95.1011213125015.444A-100000@chaos.analogic.com>
Subject: Re: Mounting a in-ROM filesystem efficiently
Date: Thu, 13 Dec 2001 13:14:16 -0500
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----- Original Message ----- 
From: "Richard B. Johnson" <root@chaos.analogic.com>
To: "Bradley D. LaRonde" <brad@ltc.com>
Cc: "Thomas Capricelli" <orzel@kde.org>; <linux-kernel@vger.kernel.org>
Sent: Thursday, December 13, 2001 1:02 PM
Subject: Re: Mounting a in-ROM filesystem efficiently


> Generally, ROM based stuff is compressed before being written to
> NVRAM. It's uncompressed into a RAM-Disk and the RAM-Disk is mounted.
> 
> That way, you can use, say, 2 megabytes of NVRAM to get a 10 to 20
> megabyte root file-system. This also allows /tmp and /var/log to be
> writable, which is a great help because the development environment 
> closely approximates the run-time environment.

That's perfect if you have plenty of RAM to spare.

> FYI, generally NVRAM access is sooooo slow. I don't think you'd
> like to use it directly as a file-system and access-time will be
> a problem unless you modify the kernel. 

Modify the kernel how?

Regards,
Brad

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