[Bug 1179610] Re: poor performance of resize2fs on 12.04

[Matt Rae]

I'm seeing slow resizefs from cloud-init.log when booting from volume,
where the volume is 100G ceph rbd. I'm seeing high IO on ceph during
this time even though I'm booting one instance at a time with a 20 disk
ceph cluster. Is resize2fs an expensive operation?

2013-09-26 08:15:17,092 - cc_resizefs.py[DEBUG]: resize took
4269.06579185 seconds

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Title:
  poor performance of resize2fs on 12.04

Status in “e2fsprogs” package in Ubuntu:
  Fix Released
Status in “e2fsprogs” source package in Precise:
  Confirmed
Status in “e2fsprogs” source package in Quantal:
  Fix Released
Status in “e2fsprogs” package in Debian:
  Fix Released

Bug description:
  I just ran a simple single instance launch, and on raring i saw:
    cc_resizefs.py[DEBUG]: Resizing took 0.450 seconds
  on precise:
    cc_resizefs.py[DEBUG]: resize took 6.509745121 seconds

  Those are real time reports from /var/log/cloud-init.log for a resize
  up to 10G root from the ~1.4G that the images have built in.

  This is known-fixed in current versions (quantal and later).
  The changes were done to upstream e2fsprogs under debian bug 663237.

  Bug 978012 is a general request for a newer e2fsprogs, and this bug is
  a specific request for the performance improvements.

  Related bugs:
   * bug 978012: Please SRU micro bug fix release of e2fsprogs 1.42.4-3ubuntu1
     (main) from Quantal (main)
   * debian bug 663237: Make resize2fs shrinking use much less CPU

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