Am 18.11.2013 um 16:29 hat Stefan Hajnoczi geschrieben:
On Thu, Nov 14, 2013 at 10:24:04AM +0800, Fam Zheng wrote:
The default cache mode for drive options is changed to writethrough, and
overridable with "./check -c <mode>".
Please make the default "writeback" so that ./check completes more
quickly.
Changing the cache mode should be a separate patch.
The current default for all shell script based tests is
cache=writethrough (can be overridden with -nocache) and Python test
cases should respect the same setting.
This is also the problem that I see with this patch: It doesn't make
'-nocache' an alias of '-c none', but both control different aspects.
What should happen is that '-c <mode>' sets
QEMU_IO_OPTIONS="$QEMU_IO_OPTIONS -t <mode>"
like -nocache does today, and the Python scripts should refer to the
same cache settings as the bash scripts do.