rootfs and /dev/root

From: Mark Dascher (strogian@yahoo.com)
Date: Tue May 20 2003 - 20:14:20 EST


I'm curious about the two entries in /proc/mounts:
rootfs and /dev/root. Although I don't have much
experience with this, I've looked through some of the
kernel source code (e.g. fs/namespace.c or
init/do_mounts.c). All I can come up with (actually,
this is pretty much what I thought before I looked at
any code) is that rootfs is purely a kernel-generated
filesystem. The kernel creates the /dev/root device
there, and then mounts /dev/root at / (replacing
rootfs).

There were some mentions of 'initrd' too, so I'm not
sure if I'm confusing rootfs with an initrd. Could
anyone clear this up for me?

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