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[Qemu-devel] Re: More qcow2 bugs? - qemu-img convert/commit


From: Paolo Bonzini
Subject: [Qemu-devel] Re: More qcow2 bugs? - qemu-img convert/commit
Date: Thu, 10 Sep 2009 01:42:27 +0200
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37% is large enough to be a clue: Does it simply expand the qcow2 file
without reading the backing file at all?  A quick strace shows that
indeed, it does *open* the backing file and it does read the backing
file's header, but after that it doesn't read it at all.

Did I miss something obvious which means this is ok?

Should the output of "qemu-img convert" be identical to the backing
file after "qemu-img commit", assuming they are the same format?

I would have thought so.

Paolo




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