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From: Alexandr Andreev <andreev@niisi.msk.ru>
To: David Woodhouse <dwmw2@infradead.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Using cramfs as root filesystem on diskless machine
Date: Fri, 15 Jun 2001 21:16:04 +0400	[thread overview]
Message-ID: <3B2A42D4.7090004@niisi.msk.ru> (raw)
In-Reply-To: <3B2A0F05.6050902@niisi.msk.ru> <14506.992621390@redhat.com>

Hi, David.
David Woodhouse wrote:

>Where does the bootloader get the initrd from?
>
Bootloader only jumps to the kernel entry point. The initrd image is 
compiled
inside the kernel. ( special section in the ELF kernel binary )
.config:
...
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=8192
CONFIG_BLK_DEV_INITRD=y
...
If 'root=/dev/ram' option is set in command line, the root file system 
will bi in
RAM. When the linux kernel is booting, it tries to identify_ramdisk_image()
( at drivers/block/rd.c ). So it can only understand ext2, minix, romfs,
and gzipped images. But what about cramfs? How can i use a cramfs image 
to mount
it as my root file system? Is any patches to the rd.c requiried?


  parent reply	other threads:[~2001-06-15 17:19 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-15 13:35 Using cramfs as root filesystem on diskless machine Alexandr Andreev
     [not found] ` <14506.992621390@redhat.com>
2001-06-15 17:16   ` Alexandr Andreev [this message]
2001-06-15 18:27 ` David L. Parsley
2001-06-19 13:24   ` Alexandr Andreev
2001-06-19 14:04     ` David L. Parsley
2001-06-19 15:08       ` how to display proxy arp addresses using "ip neigh" from iproute2 Christopher Friesen
2001-06-21  5:16         ` Bernd Eckenfels
2001-06-19 15:44       ` Using cramfs as root filesystem on diskless machine Alexandr Andreev
2001-06-19 16:36         ` Stephane Casset
2001-06-17 16:28 ` Pavel Machek
     [not found] <Pine.LNX.4.33.0106151824240.28914-100000@imladris.demon.co.uk>
2001-06-15 17:35 ` Alexandr Andreev

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