On 9/22/2021 4:21 AM, Yi Zhang wrote:

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On Wed, Sep 22, 2021 at 10:32 AM Chaitanya Kulkarni
[off-list ref] wrote:

quoted

On 9/21/21 6:56 PM, Yi Zhang wrote:

quoted

Hello

I found this issue during the nvme removal test, I did some debug code
found it was failed during nvme "CSTS – Controller Status" read, could
anyone help check if this is one HW or SW issue?

One easiest way to isolate this issue is to test the steps on the QEMU
NVMe ctrl and update everyone here...

Hi Chaitanya
I tried another NVMe SSD[1], and it works well, seems this is special
for "Samsung SSD 983 DCT 960GB".
And the kernel I used was upstream 5.15.0-rc2.

Thanks for the update.

You can also setup a NVMeOF Block device backend controller with the
nvme-loop transport and see if the problem exists.

[1]
# nvme list
Node             SN                   Model
         Namespace Usage                      Format           FW Rev
---------------- --------------------
---------------------------------------- ---------
-------------------------- ---------------- --------
/dev/nvme2n1     3080A09HTAFR         Dell Express Flash CD5 960G SFF
         1         469.18  MB / 960.20  GB    512   B +  0 B   1.2.0

--
Best Regards,
   Yi Zhang

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