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From: | Paolo Bonzini |
Subject: | [Qemu-devel] Re: More qcow2 bugs? - qemu-img convert/commit |
Date: | Thu, 10 Sep 2009 01:42:27 +0200 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090814 Fedora/3.0-2.6.b3.fc11 Lightning/1.0pre Thunderbird/3.0b3 |
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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