Re: [PATCH v2 2/2] iotests: add 269 to check maximum of bitmaps in qcow2

[Max Reitz]

On 14.10.19 13:51, Vladimir Sementsov-Ogievskiy wrote:
> Check that it's impossible to create more persistent bitmaps than qcow2
> supports.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
> ---
>  tests/qemu-iotests/269     | 47 ++++++++++++++++++++++++++++++++++++++
>  tests/qemu-iotests/269.out |  3 +++
>  tests/qemu-iotests/group   |  1 +
>  3 files changed, 51 insertions(+)
>  create mode 100755 tests/qemu-iotests/269
>  create mode 100644 tests/qemu-iotests/269.out

Is there no way to make this test any faster, e.g. by creating like
65534 bitmaps with dd and a binary blob?  (Similarly to what I do in
“iotests: Test qcow2's snapshot table handling”)

This is such an edge case, but running the test took 3:46 min before
patch 1 (which I already find much too long), and 8:13 min afterwards
(on my machine).

(To be honest, if we take this test as-is, I’m probably just never going
to run it.)

Max

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