linux-kernel - Can initramfs be mounted read-only?

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Message-ID:  <loom.20090812T194647-427@post.gmane.org>
Date:	Wed, 12 Aug 2009 19:47:17 +0000 (UTC)
From:	David Wuertele <dave+gmane@...rtele.com>
To:	linux-kernel@...r.kernel.org
Subject:  Can initramfs be mounted read-only?

I've been trying to create a system with a read-only rootfs using initramfs,
but I'm not having any luck.  I've included "ro" on my command line and when
I cat /proc/cmdline it reports "ro" like I expect.  But when I type "mount",
I see this:

  rootfs on / type rootfs (rw)

And I can create new files and write to them just fine.  Is it possible to
mount an initramfs read-only?

The documentation for early userspace and initramfs does not talk about
read/write permissions.

Thanks,
Dave

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