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Date: Tue, 25 Nov 2014 10:12:13 +0100
From: Max Reitz <mreitz@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 1/2] qemu-iotests: Speed up make check-block
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To: Fam Zheng <famz@redhat.com>, qemu-devel@nongnu.org
Cc: Kevin Wolf <kwolf@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Markus Armbruster <armbru@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, =?ISO-8859-15?Q?Andreas_F=E4rber?= <afaerber@suse.de>

On 2014-10-28 at 07:45, Fam Zheng wrote:
> Using /tmp (usually mounted as tmpfs) and cache=writeback, the quick
> group can be quicker.
>
> On my laptop (Lenovo T430s with Fedora 20), this reduces the time from
> 50s to 30s.
>
> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---
>   tests/qemu-iotests-quick.sh | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tests/qemu-iotests-quick.sh b/tests/qemu-iotests-quick.sh
> index 12af731..0b54dbf 100755
> --- a/tests/qemu-iotests-quick.sh
> +++ b/tests/qemu-iotests-quick.sh
> @@ -3,6 +3,6 @@
>   cd tests/qemu-iotests
>   
>   ret=0
> -./check -T -qcow2 -g quick || ret=1
> +TEST_DIR=/tmp/qemu-iotests-quick-$$ ./check -T -qcow2 -g quick -c writeback || ret=1

There are (at least) two tests which don't work with -c writeback (026 
and 039), one of them is in the quick group (039). Why not use -c 
writethrough? It doesn't make any difference on tmpfs anyway  (we can't 
omit it because that will break 091).

And thank you, I didn't know about TEST_DIR. I always built the full 
qemu in /tmp. *g*

Max

>   exit $ret