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SubjectRe: Mounting a in-ROM filesystem efficiently
----- Original Message -----
From: "H. Peter Anvin" <>
To: <>
Sent: Thursday, December 13, 2001 3:38 PM
Subject: Re: Mounting a in-ROM filesystem efficiently

> Followup to: <>
> By author: Thomas Capricelli <>
> In newsgroup:
> > Ideally, i would give address/length of the fs in ROM to a function, and
> > would get a ramdisk configured to read its data exactly there, and not
> > ram.
> The right thing for you to do is to write a block device driver, and
> then mount that block device like any order device. Your in-use data
> will be copied to RAM (i.e. cached), but it can be dropped and
> re-fetched as necessary. This should be the desired behaviour.

That's one way (q.v. MTD block device), but it adds an unecessary block

The cramfs patch I mentioned shuns the block layer and instead allows the fs
to read directly from ROM.


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