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Re: [Qemu-devel] [PATCH] qemu-iotests: mark 035 qcow2-only

From: Kevin Wolf
Subject: Re: [Qemu-devel] [PATCH] qemu-iotests: mark 035 qcow2-only
Date: Fri, 25 May 2012 18:17:36 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1

Am 24.05.2012 17:26, schrieb Stefan Hajnoczi:
> The 035 parallel aio write test relies on knowledge of qcow2 metadata
> layout to stress parallel L2 table accesses.  This only works for qcow2
> unless we add additional calculations for qed or other formats.
> Mark this test as qcow2-only.
> Note that the test is strictly speaking non-deterministic although the
> output produced is reliable with qcow2.  This is because the aio_write
> command returns before the aio write request has completed.  Completions
> can occur at any time afterwards and cause a message to be printed.
> Therefore the exact output of this test is not deterministic but we seem
> to get away with it for qcow2 (maybe due to coroutine and main loop
> scheduling).
> Signed-off-by: Stefan Hajnoczi <address@hidden>

Thanks, applied to the block branch.


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