linux-kernel - Re: How to mount filesystem from RAM ?

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Message-ID: <BANLkTin6dXxj-HVMhR_KJzWjHdO8cb=3JQ@mail.gmail.com>
Date:	Tue, 19 Apr 2011 19:19:04 +0530
From:	Rabin Vincent <rabin@....in>
To:	Jongman Heo <jongman.heo@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: How to mount filesystem from RAM ?

On Tue, Apr 19, 2011 at 11:32, Jongman Heo <jongman.heo@...il.com> wrote:
> Instead, I can load the data from the partition into RAM, which means
> whole filesystem data is copied into some location of RAM. ( I know
> the physical address, for the data to be loaded.) This copy operation
> is done by bootloader side, not in Linux.
>
> In this case, how can I mount the filesystem from RAM? Is there any
> way to do this?

Have a look at slram or phram in drivers/mtd/devices/.

> And I think the memory location of filesystem data should be reserved
> not to be used by Linux kernel and user space application, am I right?

One way to do this is by passing appropriate mem= arguments.
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