Re: [Qemu-devel] [PATCH] doc: Preallocation does not require writing zeroes

[Daniel P . Berrangé]

On Thu, Jul 11, 2019 at 03:29:35PM +0200, Max Reitz wrote:
> When preallocating an encrypted qcow2 image, it just lets the protocol
> driver write data and then does not mark the clusters as zero.
> Therefore, reading this image will yield effectively random data.
> 
> As such, we have not fulfilled the promise of always writing zeroes when
> preallocating an image in a while.  It seems that nobody has really
> cared, so change the documentation to conform to qemu's actual behavior.
> 
> Signed-off-by: Max Reitz <address@hidden>
> ---
>  qapi/block-core.json         | 9 +++++----
>  docs/qemu-block-drivers.texi | 4 ++--
>  qemu-img.texi                | 4 ++--
>  3 files changed, 9 insertions(+), 8 deletions(-)


Reviewed-by: Daniel P. Berrangé <address@hidden>


Regards,
Daniel
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