> BTW, when I ran the test case, I observed the test case failed. I took a quick > look, and saw the nvme driver reported I/O timeout in kernel messages. But fio > did not report the expected I/O error. Not sure why. I will look closer when I > check v2 patch. Ohh really ? I've consistently seen I/O timeout error in the kernel message and with fio output giving I/O error. Thanks a lot for looking into this, all the suggestions look good to me, meanwhile I've raised a question that ideal scenario should be in order to pass the testcase see [1]. As I'm getting device with 0 capacity at the end of testcase and there are still open questions. As soon as I get reply will modify the testcase passing scenario and send V2. -ck [1] http://lists.infradead.org/pipermail/linux-nvme/2024-January/044263.html