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Date: Sat, 28 Sep 2013 11:01:59 -0500
From: William Hubbs <williamh@gentoo.org>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] separate / and /usr to require initramfs 2013-11-01
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On Fri, Sep 27, 2013 at 07:32:20PM -0500, Bruce Hill wrote:
> On Fri, Sep 27, 2013 at 05:57:06PM -0500, Dale wrote:
> > Bruce Hill wrote:
> > > On Fri, Sep 27, 2013 at 05:33:02PM -0500, Dale wrote:
> > >> I'm hoping that since I use eudev, I don't have to worry about this.
> > >> If I do, this could get interesting, again. Dale=20
> > > Do you have /usr separate from / ?
> >=20
> > Yep.  From my understanding tho, eudev is not supposed to be affected by
> > this problem tho.=20
> >=20
> > One reason for this being seperate, I have / and /boot on a regular
> > partition and everything else on LVM.  Sometimes that /usr gets a bit
> > full.  It's not so bad after I moved all the portage stuff out and put
> > it in /var.  Now I have to watch /var too.  lol=20
> >=20
> > Dale
>=20
> You need to read the blog post listed in the news item, as it's not just
> specific to udev anymore.

Bruce is correct; This issue is not specific to udev/eudev/mdev.

I suppose that what I am about to say isn't really relevant, but it is
unfortunate over the past year that people blamed udev specifically for
this. It is true that it does things that don't work if /usr isn't
mounted, but eudev does as well, since it is basically the same code.

If you read flameeyes' blog post, you will get a better idea of what the
issue involves. It is the entire boot process and how to deal with which
software is considered critical for booting.

There is no reason to rebuild your server; we aren't telling you you
have to merge /usr into /. The only thing we are saying is that you will
need to use an initramfs if you are going to keep them separate.

I have a pretty simple setup, but I have been using an initramfs which I
built some time ago with genkernel and I barely know it is there.

I recommend that you familiarize yourself with genkernel or dracut and
build an initramfs. Since nothing is changing until at least
Nov 1, you can test your initramfs by adding an entry to your boot
loader configuration that uses it and get it set up correctly while you
can still fall back on booting without it.

I do not recommend that anyone who has separate /usr "do nothing" at
this point. Please re-read the second paragraph of the news item.

Thanks,

William


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