[Bug 1240699] Re: reinstall system extremely slow

[Brian Murray]

I believe this is where things start to go wrong:

Oct 16 20:31:12 ubuntu ubiquity: Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 44.
Oct 16 20:31:12 ubuntu ubiquity: Use of uninitialized value in -e at /usr/share/perl5/Debconf/DbDriver/File.pm line 46.
Oct 16 20:31:12 ubuntu ubiquity: Use of uninitialized value in pattern match (m//) at /usr/share/perl5/Debconf/DbDriver/File.pm line 47.
Oct 16 20:31:12 ubuntu ubiquity: Use of uninitialized value $directory in -d at /usr/share/perl5/Debconf/DbDriver/File.pm line 48.
Oct 16 20:31:12 ubuntu ubiquity: Use of uninitialized value $directory in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 49.
Oct 16 20:31:12 ubuntu ubiquity: debconf: DbDriver "targetdb": mkdir :No such file or directory
Oct 16 20:31:12 ubuntu ubiquity[2465]: log-output -t ubiquity debconf-copydb configdb targetdb -p ^oem-config/ --config=Name:targetdb --config=Driver:File --config=Mode:0644 --config=Filename:/target/var/cache/debconf/config.dat

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https://bugs.launchpad.net/bugs/1240699

Title:
  reinstall system extremely slow

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  Image: 20131016.1 saucy amd64 desktop

  I started an install with "reinstall system" selected on virtualbox a
  little over 20 min. ago. At least for the past 15 min or so, it seems
  to still be stuck on the "Saving installed packages" step.

  A quick look at /var/log/syslog shows that it *is* making progress,
  but it's extremely slow. This was a test install for the iso testing
  before, so I didn't have loads of extra packages installed or
  anything.  Looking at top, I saw it alternating between dpkg-deb and
  rcu_sched being the busiest processes, each taking 20-30% cpu or so.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: ubiquity 2.15.26
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.336ubuntu1
  Date: Wed Oct 16 15:50:06 2013
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MarkForUpload: True
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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