[Bug 404394] Re: qcow2 corruption regression

[Dustin Kirkland]

And the Jaunty patch for jaunty-proposed.

** Attachment added: "jaunty-404294.debdiff"
   http://launchpadlibrarian.net/35112091/jaunty-404294.debdiff

** Description changed:

  Binary package hint: kvm
  
  Since the latest update to 1:84+dfsg-0ubuntu12, any existing or new kvm
  host using a qcow2 file encounters disk errors and eventual lockup
  inside the guest.
  
  The errors inside the guest (root is /dev/vda1, other filesystems are lvm on top of /dev/vda2).  This can happen at bootup if there is enough IO, or boot just fine and occur when IO picks up.
  ----
  REISERFS: abort (device dm3): Journal write error in flush_commit_list
  REISERFS: Aborting journal for filesystem on dm-3
  request_module: runaway loop modprobe binfmt-0000
  Buffer I/O error on device dm-3, logical block 1063056
  Buffer I/O error on device dm-3, logical block 1063072
  ... ad infinitum
  ----
  
  Converting the qcow2 to a raw and back to qcow2 does not work, nor does
  using the newer version of qemu-img (v0.10.0) from the 'qemu' package to
  convert the raw to qcow2.  Problems occur on 9.04 and 8.04 - both are
  x86_64 and have all the latest updates applied.
  
  KVM Host:
  Linux ronto 2.6.28-13-server #45-Ubuntu SMP Tue Jun 30 22:56:18 UTC 2009 x86_64 GNU/Linux
  
  KVM Guests:
  Linux halfrun 2.6.24-24-server #1 SMP Tue Jun 30 20:24:57 UTC 2009 x86_64 GNU/Linux
  Linux zack 2.6.28-13-server #45-Ubuntu SMP Tue Jun 30 22:56:18 UTC 2009 x86_64 GNU/Linux
  
  LVM setup:
-  * /kvm is an LV on the Host where the guest qcow2 files are stored
-  * Each qcow2 file has two partitions, vda1 (root) and vda2 (a PV for LVs inside the Guests of which var/tmp/swap are LVs)
+  * /kvm is an LV on the Host where the guest qcow2 files are stored
+  * Each qcow2 file has two partitions, vda1 (root) and vda2 (a PV for LVs inside the Guests of which var/tmp/swap are LVs)
+ 
+ ============
+ SRU Verification
+  1) Follow *precisely* the instructions in Comment #6 by Nathan.  This reproduces the problem for me every time on the *ubuntu12.3 version of the package.
+  2) Upgrade to the proposed version of this package, and retry those instructions.  The problem does not occur.
+ ============

** Changed in: kvm (Ubuntu Hardy)
   Importance: Undecided => High

** Changed in: kvm (Ubuntu Karmic)
   Importance: Undecided => High

** Changed in: kvm (Ubuntu Intrepid)
   Importance: Undecided => High

** Changed in: kvm (Ubuntu Karmic)
     Assignee: (unassigned) => Dustin Kirkland (kirkland)

** Changed in: kvm (Ubuntu Intrepid)
     Assignee: (unassigned) => Dustin Kirkland (kirkland)

** Changed in: kvm (Ubuntu Jaunty)
     Assignee: (unassigned) => Dustin Kirkland (kirkland)

-- 
qcow2 corruption regression
https://bugs.launchpad.net/bugs/404394
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