qemu-iotests: Change default cache mode to "writeback"

So that the tests can run faster.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

diff --git a/tests/qemu-iotests/common b/tests/qemu-iotests/common
index 4743c9e007d32546230b1378850addbb52d686ae..b2a0944ae07139d2a6f22d96e8904f12877dcbf2 100644 (file)
--- a/tests/qemu-iotests/common
+++ b/tests/qemu-iotests/common
@@ -49,7 +49,7 @@ export IMGFMT=raw
 export IMGFMT_GENERIC=true
 export IMGPROTO=file
 export IMGOPTS=""
-export CACHEMODE="writethrough"
+export CACHEMODE="writeback"
 export QEMU_IO_OPTIONS=""
 export CACHEMODE_IS_DEFAULT=true