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Re: [Qemu-devel] qcow2, lazy_refcounts and killing qemu
From: |
Greg Kurz |
Subject: |
Re: [Qemu-devel] qcow2, lazy_refcounts and killing qemu |
Date: |
Mon, 1 Sep 2014 16:30:38 +0200 |
On Mon, 1 Sep 2014 15:19:28 +0100
"Richard W.M. Jones" <address@hidden> wrote:
> A test case, attached.
>
> Note that you have to look at the output of the final qemu-img info
> command. In the case where it goes wrong, the 'backing file:' and
> 'backing file format:' lines disappear completely. In the case where
> the bug is not reproduced, these lines are still present.
>
> It's 100% reproducible for me when lazy_refcounts=on, and 0%
> reproducible when lazy_refcounts=off.
>
> BUT it only occurs if the backing file is a remote source (nbd:... in
> this case), not if the backing file is a plain file. Make of that
> what you will.
>
> Rich.
>
Thanks. I'll try that.
--
Gregory Kurz address@hidden
address@hidden
Software Engineer @ IBM/Meiosys http://www.ibm.com
Tel +33 (0)562 165 496
"Anarchy is about taking complete responsibility for yourself."
Alan Moore.