v1 was here:
https://lists.gnu.org/archive/html/qemu-devel/2025-05/msg05449.html

Since then
 - add more patches
 - don't try sync; that wasn't enough for ZFS

I don't have ZFS locally, so patch 3 WILL need to be tested there (but
I did test that the skip mechanism works on ext4 when I intentionally
tweak the common.rc code to fail failure); and this only addresses the
subset of tests in Fiona's email where I could obviously see some sort
of probing of image sizes, and not every test mentioned.

Eric Blake (3):
  iotests: Use disk_usage in more places
  iotests: Improve mirror-sparse on ext4
  iotests: Filter out ZFS in several tests

 tests/qemu-iotests/common.rc                | 30 +++++++++++++++++++++
 tests/qemu-iotests/106                      |  1 +
 tests/qemu-iotests/125                      |  2 +-
 tests/qemu-iotests/175                      |  1 +
 tests/qemu-iotests/221                      |  1 +
 tests/qemu-iotests/253                      |  1 +
 tests/qemu-iotests/308                      |  5 ++--
 tests/qemu-iotests/tests/mirror-sparse      |  5 +++-
 tests/qemu-iotests/tests/write-zeroes-unmap |  1 +
 9 files changed, 43 insertions(+), 4 deletions(-)

-- 
2.49.0