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Re: [Qemu-block] [PATCH v13 06/12] qcow2: Make distinction between zero

From: Eric Blake
Subject: Re: [Qemu-block] [PATCH v13 06/12] qcow2: Make distinction between zero cluster types obvious
Date: Mon, 8 May 2017 12:15:53 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.0

On 05/08/2017 10:54 AM, Max Reitz wrote:
> On 07.05.2017 02:05, Eric Blake wrote:
>> Treat plain zero clusters differently from allocated ones, so that
>> we can simplify the logic of checking whether an offset is present.
>> Do this by splitting QCOW2_CLUSTER_ZERO into two new enums,

> (No, I'm not mentioning the fact that 060.out contains one more mention
> of "Data cluster offset" that should definitely be a "Cluster allocation
> offset" or even "Preallocated zero cluster offset" at
> block/qcow2-cluster.c:1780, because let's really worry about this later)

Oh, you mean this?

Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org

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