qemu-iotests: 068: test iothread mode

Perform the savevm/loadvm test with both iothread on and off.  This
covers the recently found savevm/loadvm hang when iothread is enabled.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/068

@@ -45,11 +45,6 @@ _supported_os Linux
 IMGOPTS="compat=1.1"
 IMG_SIZE=128K
 
-echo
-echo "=== Saving and reloading a VM state to/from a qcow2 image ==="
-echo
-_make_test_img $IMG_SIZE
-
 case "$QEMU_DEFAULT_MACHINE" in
   s390-ccw-virtio)
       platform_parm="-no-shutdown"
@@ -71,10 +66,20 @@ _qemu()
     _filter_qemu | _filter_hmp
 }
 
-# Give qemu some time to boot before saving the VM state
-bash -c 'sleep 1; echo -e "savevm 0\nquit"' | _qemu
-# Now try to continue from that VM state (this should just work)
-echo quit | _qemu -loadvm 0
+for extra_args in \
+    "" \
+    "-object iothread,id=iothread0 -set device.hba0.iothread=iothread0"; do
+    echo
+    echo "=== Saving and reloading a VM state to/from a qcow2 image ($extra_args) ==="
+    echo
+
+    _make_test_img $IMG_SIZE
+
+    # Give qemu some time to boot before saving the VM state
+    bash -c 'sleep 1; echo -e "savevm 0\nquit"' | _qemu $extra_args
+    # Now try to continue from that VM state (this should just work)
+    echo quit | _qemu $extra_args -loadvm 0
+done
 
 # success, all done
 echo "*** done"

tests/qemu-iotests/068.out

 QA output created by 068
 
-=== Saving and reloading a VM state to/from a qcow2 image ===
+=== Saving and reloading a VM state to/from a qcow2 image () ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) savevm 0
+(qemu) quit
+QEMU X.Y.Z monitor - type 'help' for more information
+(qemu) quit
+
+=== Saving and reloading a VM state to/from a qcow2 image (-object iothread,id=iothread0 -set device.hba0.iothread=iothread0) ===
 
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072
 QEMU X.Y.Z monitor - type 'help' for more information