[PATCH blktests 0/2] Add scsi-stress-remove to blktests

[Dennis Zhou <dennis@kernel.org>]

Hi,

Ming Lei's scsi-stress-remove test found a bug in blkg destruction [1]
where bios being created when the request_queue was being cleaned up
threw a NPE in blkg association. The fix is currently being discussed in
[2]. To make this test more accessible, I've ported it to blktests with
Ming Lei's copyright. I've tested this in my qemu instance and verified
we do not see the NPE on a fixed kernel.

Ming, please let me know if you have any objections.

[1] https://lore.kernel.org/linux-block/CACVXFVO_QXipD3cmPvpLyBYSiEcWPN_ThQ=0pO9AwLqN-Lv93w@mail.gmail.com
[2] https://lore.kernel.org/lkml/20181211230308.66276-1-dennis@kernel.org/

This patchset is ontop of osandov#josef ad08c1fe0d9f.

diffstats below:

Dennis Zhou (2):
  blktests: split out cgroup2 controller and file check
  blktests: add Ming Lei's scsi-stress-remove

 common/cgroup       | 18 ++++++---
 tests/block/022     | 96 +++++++++++++++++++++++++++++++++++++++++++++
 tests/block/022.out |  2 +
 3 files changed, 111 insertions(+), 5 deletions(-)
 create mode 100755 tests/block/022
 create mode 100644 tests/block/022.out

Thanks,
Dennis