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

[Dave Chiluk]

So this turned out to be a much bigger job than I think can be safely
SRU'ed.  I narrowed the list down to 25-30 fixes depending on how you do
it, neither of which built at the end.  Even if I spent the requisite
amount of time to get this building that doesn't mean I would have
successfully handled all corner cases.  This is way to dangerous to
backport this feature into precise in a subsystem that the majority of
our users depend on to store their data.

So I'm moving the precise track to will not fix.

** Changed in: e2fsprogs (Ubuntu Precise)
       Status: Confirmed => Opinion

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https://bugs.launchpad.net/bugs/1179610

Title:
  poor performance of resize2fs on 12.04

Status in “e2fsprogs” package in Ubuntu:
  Fix Released
Status in “e2fsprogs” source package in Precise:
  Opinion
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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