From: Gerd Hoffmann <kraxel@redhat.com>

The build script doesn't shutdown the guest VMs properly,
which results in filesystem corruption and guest boot
failures sooner or later.

Use the --snapshot to run builds on a snapshot,
That way killing the VM doesn't corrupt the base image.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Acked-by: Ed Maste <emaste@freebsd.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190617043858.8290-4-kraxel@redhat.com>
[AJB: added tags]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 tests/vm/Makefile.include | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/vm/Makefile.include b/tests/vm/Makefile.include
index c59411bee0..276b870216 100644
--- a/tests/vm/Makefile.include
+++ b/tests/vm/Makefile.include
@@ -57,6 +57,7 @@ vm-build-%: $(IMAGES_DIR)/%.img
 		$(if $(V),--verbose) \
 		--image "$<" \
 		$(if $(BUILD_TARGET),--build-target $(BUILD_TARGET)) \
+		--snapshot \
 		--build-qemu $(SRC_PATH) -- \
 		$(if $(TARGET_LIST),--target-list=$(TARGET_LIST)) \
 		$(if $(EXTRA_CONFIGURE_OPTS),$(EXTRA_CONFIGURE_OPTS)), \
-- 
2.20.1