[Bug 1060296] Re: 'df /' reports Filesystem '-'

[Steve Langasek]

The mountall output here looks perfectly normal:

mount /sys/fs/fuse/connections [320] exited normally
[...]

mount /sys/kernel/debug [341] exited normally
[...]
mount /sys/kernel/security [344] exited normally
[...]
mount /run/lock [345] exited normally
[...]
mount /run/shm [346] exited normally
[...]
mount /run/user [347] exited normally
[...]
mounting event handled for /
remounting /
mount / [348] exited normally
[...]
mount /proc [350] exited normally
mount /sys [351] exited normally
mount /sys/fs/fuse/connections [352] exited normally
mount /dev [353] exited normally
mount /dev/pts [354] exited normally
mount /run [355] exited normally

Each of those repeated 'mount' commands following the remount of / is
there to update /etc/mtab with mount -f.  Are you sure nothing else on
the system is editing the mtab?

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Title:
  'df /' reports Filesystem '-'

Status in “mountall” package in Ubuntu:
  Confirmed

Bug description:
  somewhere between beta-2 and 20121001, we have a change in df output:

  From:
   | $ cat /etc/cloud/build.info 
   | build_name: server
   | serial: 20120925
   | $ df -h /
   | Filesystem      Size  Used Avail Use% Mounted on
   | /dev/vda1       9.9G  1.1G  8.5G  11% /
   | $ dpkg-query --show coreutils
   | coreutils       8.13-3.2ubuntu1

  To:
   | $ cat /etc/cloud/build.info 
   | build_name: server
   | serial: 20121002
   | $ df -h /
   | Filesystem      Size  Used Avail Use% Mounted on
   | -               9.9G  1.1G  8.5G  11% /
   | $ dpkg-query --show coreutils
   | coreutils       8.13-3.2ubuntu2

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: coreutils 8.13-3.2ubuntu2
  ProcVersionSignature: User Name 3.5.0-16.25-generic 3.5.4
  Uname: Linux 3.5.0-16-generic i686
  ApportVersion: 2.6.1-0ubuntu1
  Architecture: i386
  Date: Tue Oct  2 16:07:59 2012
  Ec2AMI: ami-00000158
  Ec2AMIManifest: FIXME
  Ec2AvailabilityZone: nova
  Ec2InstanceType: m1.small
  Ec2Kernel: unavailable
  Ec2Ramdisk: unavailable
  ProcEnviron:
   TERM=screen
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: coreutils
  UpgradeStatus: No upgrade log present (probably fresh install)

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