On Fri 27 Mar 2020 07:13:04 PM CET, Eric Blake wrote: >> +for qcow2_compat in 0.10 1.1; do >> + echo "# Create an image with compat=$qcow2_compat without a backing >> file" >> + _make_test_img -o "compat=$qcow2_compat" 128k >> + >> + echo "# Fill all clusters with data and then discard them" >> + $QEMU_IO -c 'write -P 0x01 0 128k' "$TEST_IMG" | _filter_qemu_io >> + $QEMU_IO -c 'discard 0 128k' "$TEST_IMG" | _filter_qemu_io >> + >> + echo "# Read the data from the discarded clusters" >> + $QEMU_IO -c 'read -P 0x00 0 128k' "$TEST_IMG" | _filter_qemu_io >> +done > > Should this loop also inspect qemu-img map output?
I guess we can, although here the image is completely unallocated in both cases. Berto
