linux-kernel - Re: 2.6.22-rc4-mm1

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Date:	Fri, 8 Jun 2007 08:50:27 -0700
From:	Greg KH <gregkh@...e.de>
To:	Valdis.Kletnieks@...edu
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Peter Jones <pjones@...hat.com>,
	Kay Sievers <kay.sievers@...y.org>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: 2.6.22-rc4-mm1

On Fri, Jun 08, 2007 at 11:33:38AM -0400, Valdis.Kletnieks@...edu wrote:
> On Thu, 07 Jun 2007 16:09:04 PDT, Greg KH said:
> > If CONFIG_SYSFS_DEPRECATED everything should work just fine with all old
> > initrd scripts.  It's only if you enable that option (which is enabled
> > by default) that you need to ensure that your distro has the latest
> > functionality so that everything works properly.
> 
> Can somebody document what an initrd has to do differently?  Some of us
> run with initrd's not created by mkinitrd.

So I'm guessing that you wrote your own initrd?

The main issue is that /sys/block/ is now full of symlinks, not real
directories, if CONFIG_SYSFS_DEPRECATED is not enabled.  That means that
any program that was doing stat() should be doing lstat() for the block
directory to work on all instances (remember, whenever looking for a
directory or a file in sysfs, it could be either a real file/directory
or a symlink, you should not care either way.)

People have also reported that for some reason, removing the '--movedev'
argument to switchroot is also needed, but that might just be a Fedora 7
specific thing, I'm not quite sure.

See the post from Alan Stern on lkml with the subject:
	Re: [RFC PATCH] /sys/block -> /sys/class/block  (Fedora 3 & 4 testers wanted)

for more details on that.

Hope this helps,

greg k-h
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