From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dave Hansen <haveblue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Subject: Re: [RFC][PATCH] Devices visibility container
Date: Wed, 26 Sep 2007 08:36:12 -0700
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To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: Linux Containers <containers-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>, Paul Menage <menage-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Pavel Emelyanov <xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>
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On Tue, 2007-09-25 at 07:30 -0600, Eric W. Biederman wrote:
> Pavel Emelyanov <xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org> writes:
> >
> > Oh! Can you provide us an example when after the migration some
> > device's major+minor pair change on the same device?
> 
> SCSI disks on a SAN.  Network accessible block devices.
> All kinds of logical/virtual devices like ttys, the loop device, and
> ramdisks.
> 
> It isn't especially frequent that something cares, but fundamentally
> the same issues apply.

To be clear, this just covers cases where an application has
_internalized_ the device number, right?

Most applications should be pretty happy with the devices having
persistent device names across a restart, and we can do that with udev
and no kernel patching.

-- Dave