blktests failures with v6.11-rc1 kernel

[Shinichiro Kawasaki]

CC+: Yi Zhang,

On Aug 02, 2024 / 17:46, Nilay Shroff wrote:
> 
> 
> On 8/2/24 14:39, Shinichiro Kawasaki wrote:
> > 
> > #3: nvme/052 (CKI failure)
> > 
> >    The CKI project reported that nvme/052 fails occasionally [4].
> >    This needs further debug effort.
> > 
> >   nvme/052 (tr=loop) (Test file-ns creation/deletion under one subsystem) [failed]
> >       runtime    ...  22.209s
> >       --- tests/nvme/052.out	2024-07-30 18:38:29.041716566 -0400
> >       +++ /mnt/tests/gitlab.com/redhat/centos-stream/tests/kernel/kernel-tests/-/archive/production/kernel-tests-production.zip/storage/blktests/nvme/nvme-loop/blktests/results/nodev_tr_loop/nvme/052.out.bad	2024-07-30 18:45:35.438067452 -0400
> >       @@ -1,2 +1,4 @@
> >        Running nvme/052
> >       +cat: /sys/block/nvme1n2/uuid: No such file or directory
> >       +cat: /sys/block/nvme1n2/uuid: No such file or directory
> >        Test complete
> > 
> >    [4] https://datawarehouse.cki-project.org/kcidb/tests/13669275
> 
> I just checked the console logs of the nvme/052 and from the logs it's 
> apparent that all namespaces were created successfully and so it's strange
> to see that the test couldn't access "/sys/block/nvme1n2/uuid".

I agree that it's strange. I think the "No such file or directory" error
happened in _find_nvme_ns(), and it checks existence of the uuid file before
the cat command. I have no idea why the error happens.

> Do you know
> if there's any chance of simultaneous blktests running on this machine?

The error was observed in CKI project test environment. I'm not sure if such
simultaneous runs can happen in the environment.

Yi, in case you have any comment, please share.

>  
> On my test machine, I couldn't reproduce this issue on 6.11-rc1 kernel.

I tried on my two test machines (QEMU and baremetal), and couldn't reproduce
either.