linux-kernel - Re: I give up

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Message-Id: <1176169246.3193.2.camel@obelisk.thedillows.org>
Date:	Mon, 09 Apr 2007 21:40:46 -0400
From:	Dave Dillow <dave@...dillows.org>
To:	Dave Jones <davej@...hat.com>
Cc:	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	Gene Heskett <gene.heskett@...il.com>,
	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: I give up

On Mon, 2007-04-09 at 21:27 -0400, Dave Jones wrote:
> On Mon, Apr 09, 2007 at 06:22:10PM -0400, Dave Dillow wrote:
>  > On Mon, 2007-04-09 at 23:35 +0200, Jan Engelhardt wrote:
>  > > On Apr 9 2007 15:38, Gene Heskett wrote:
>  > > >On Monday 09 April 2007, H. Peter Anvin wrote:
>  > > >>Jan Engelhardt wrote:
>  > > >>> dm is on 254 for me.. in opensuse with a 2.6.20 that is. I wonder why
>  > > >>> it even moves around. However, even then, those who use udev and
>  > > >>> device names rather than (major,minor) tuples should not have any
>  > > >>> problem.
>  > > >>
>  > > >>It moves around because someone at some point thought it was a great
>  > > >>idea to assign dynamic majors to core functionality.
>  > > >>
>  > > >What were they smoking, I want some of that!
>  > > 
>  > > Do you actually use udev?
>  > 
>  > udev doesn't help the problem he is having (and he is using it, since he
>  > is using Fedora).
> 
> However, it also doesn't explain what the point is of backing up /dev
> when it's dynamically created.

It's not /dev he's backing up -- its /home, /usr, and others. GNU tar
saves the device and inode numbers from the {,l}stat() call on each file
and decides it is a new file if either number changes from run to run.

You are correct about /dev -- who'd back it up if it is dynamically
created? But that is also not the problem Gene is having.
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