Re: [Qemu-devel] [PATCH v10 05/17] iotests: Add test 179 to cover write zeroes with unmap

[Max Reitz]

On 27.04.2017 03:46, Eric Blake wrote:
> No tests were covering write zeroes with unmap.  Additionally,
> I needed to prove that my previous patches for correct status
> reporting and write zeroes optimizations actually had an impact.
> 
> The test works for cluster_size between 8k and 2M (for smaller
> sizes, it fails because our allocation patterns are not contiguous
> with small clusters).
> 
> Signed-off-by: Eric Blake <address@hidden>
> 
> ---
> v10: drop any changes to v2 files, rewrite test to work with updates
> earlier in the series, add a blkdebug probe
> v9: new patch
> ---
>  tests/qemu-iotests/179     | 123 
> +++++++++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/179.out |  90 +++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/group   |   1 +
>  3 files changed, 214 insertions(+)
>  create mode 100755 tests/qemu-iotests/179
>  create mode 100644 tests/qemu-iotests/179.out

Can I convince you to write this test in a different way? I really have
a hard time following all of the writes and building a mental image of
how the qcow2 file should look in the end so I can compare it to the map
output.

I'd like it better if you would check the qcow2 file after each group of
write operations, maybe even creating a new image for every such group.
But even just having more qemu-img map calls (and changing nothing else)
would help me a lot.

Max

signature.asc
Description: OpenPGP digital signature