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Re: [Qemu-devel] [PATCH 2/3] qcow2: Fix write_zeroes with partially allo
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From: |
Eric Blake |
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Subject: |
Re: [Qemu-devel] [PATCH 2/3] qcow2: Fix write_zeroes with partially allocated backing file cluster |
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Date: |
Tue, 17 May 2016 11:22:33 -0600 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
On 05/17/2016 10:51 AM, Kevin Wolf wrote:
> In order to correctly check whether a given cluster is read as zero, we
> don't only need to check whether bdrv_get_block_status_above() sets
> BDRV_BLOCK_ZERO, but also if all sectors for the whole cluster have the
> same status.
>
> Signed-off-by: Kevin Wolf <address@hidden>
> ---
> block/qcow2.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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