[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zer
Re: [Qemu-block] [PATCH] doc: Preallocation does not require writing zeroes
Thu, 11 Jul 2019 17:04:29 +0300
On Thu, 2019-07-11 at 15:29 +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>
I did a little grep on qemu source tree with mentions of preallocation,
and it looks like these are the only mentions that need to be fixed.
So, thank you very much, and
Reviewed-by: Maxim Levitsky <address@hidden>