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Re: [Qemu-devel] [PATCH v9 07/11] block: Add QMP support for streaming t

From: Alberto Garcia
Subject: Re: [Qemu-devel] [PATCH v9 07/11] block: Add QMP support for streaming to an intermediate layer
Date: Tue, 03 May 2016 15:29:25 +0200
User-agent: Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu)

On Tue 03 May 2016 03:18:39 PM CEST, Kevin Wolf wrote:
>> > On the other hand, this code assumes that there is only a single
>> > top-level node. This isn't necessarily true any more these days.
>> Hmm... if you give me an example I can test that scenario.
> Simply reference the same node twice:
> $ x86_64-softmmu/qemu-system-x86_64 \
> -drive if=none,file=/tmp/backing.qcow2,id=backing \
> -drive file=/tmp/test.qcow2,backing=backing,id=hda \
> -drive file=/tmp/test2.qcow2,backing=backing,id=hdb

You're right, but maybe we need to add additional checks to some of the
existing commands then, because if you run e.g block-commit on hda
you're gonna corrupt hdb.


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