Linux kernel 5.9 introduced a new sysfs attribute "max_active_zones". It is an attribute of zoned block devices which indicates the limit of zones in open or close status. When zoned block devices has this limit, test cases block/004 and zbd/003 fail since write operations in them open zones and the number of open zones excceds the limit. This patch series addresses the failures. The first patch introduces a helper function to get the max_active_zones value. Following patches modify the two test cases to avoid the failures. Shin'ichiro Kawasaki (3): common/rc: Add _test_dev_max_active_zones() helper function block/004: Provide max_active_zones to fio command zbd/003: Reset zones when the test device has max_active_zones limit common/rc | 8 ++++++++ tests/block/004 | 9 ++++----- tests/zbd/003 | 5 +++++ 3 files changed, 17 insertions(+), 5 deletions(-) -- 2.26.2