[Bug 712392] Re: qemu-img convert blocks other tasks

[Serge Hallyn]

I've tried again to reproduce this to no avail.

Do you get different behavior if you do

   qemu-img convert -f raw -O raw /dev/yourvg/yourlv lv1.raw

and if you do

   dd if=/dev/yourvg/yourlv of=lv2.raw

?

If not, then the compression if you're using it, or simply memory
pressure appears to be the cause, so beside ionice you may want to try
to simply use 'nice'

Also, please let us know if using a cgroup works for you (and, if not,
please provide all the settings you used).


** Changed in: qemu-kvm (Ubuntu)
       Status: New => Incomplete

** Changed in: qemu-kvm (Ubuntu)
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/712392

Title:
  qemu-img convert blocks other tasks