On Thu, 2018-12-06 at 10:48 -0700, Jens Axboe wrote: +AD4 which would result in a non-zero exit, which should be expected for this +AD4 test? Hi Jens, Test srp/002 simulates network failures while running fio on top of dm-mpath. Since queue+AF8-if+AF8-no+AF8-path is enabled in multipath.conf dm-mpath will keep retrying the block layer requests it receives if these requests fail due to path removal. If fio reports +ACI-io+AF8-u error+ACI for this test then that means that the test failed. I haven't seen fio reporting any I/O errors for this test with any upstream kernel that I tested in the past year or so. Bart.