Re: blktests failures with v6.10-rc1 kernel

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On 31.05.24 03:54, Shinichiro Kawasaki wrote:
Hi all,

(I added linux-rdma list to the To list since blktests nvme and srp groups
  depend on rdma drivers.)

I ran the latest blktests (git hash: 698f1a024cb4) with the v6.10-rc1 kernel,
and observed a couple of failures as listed below.

There are two notable differences from the result with kernel v6.9-rc1 [1].
The first one is srp/002,011 hangs with the rdma rxe driver, which was discussed

IIRC, the problem with srp/002, 011 also occurs with siw driver, do you make tests with siw driver to verify whether the problem with srp/002, 011 is also fixed or not?

Thanks,
Zhu Yanjun

at LSF 2024. I no longer observe these hangs with v6.10-rc1 kernel. Great :) I
found Bob Pearson made a number of improvements in the driver. I guess these
changes avoided the hangs. Thank you very much!

The other difference is nbd/002 failure. CKI project still reports it for
v6.10-rc1 kernel [2]. Recently Josef provided blktests side fix [3] (Thanks!),
and it has not yet applied to the CKI test run set up. The fix was made for
nbd/001, but I expect that it will avoid the nbd/002 failure also.

[1] https://lore.kernel.org/linux-block/m6a437jvfwzq2jfytvvk62zpgu7e4bjvegr7x73pihhkp5me5c@sh6vs3s7w754/
[2] https://datawarehouse.cki-project.org/kcidb/tests/12631448
[3] https://lore.kernel.org/linux-block/9377610cbdc3568c172cd7c5d2e9d36da8dd2cf4.1716312272.git.josef@xxxxxxxxxxxxxx/


List of failures
================
#1: nvme/041 (fc transport)
#2: nvme/050

Failure description
===================

#1: nvme/041 (fc transport)

    With the trtype=fc configuration, nvme/041 fails:

   nvme/041 (Create authenticated connections)                  [failed]
       runtime  2.677s  ...  4.823s
       --- tests/nvme/041.out      2023-11-29 12:57:17.206898664 +0900
       +++ /home/shin/Blktests/blktests/results/nodev/nvme/041.out.bad     2024-03-19 14:50:56.399101323 +0900
       @@ -2,5 +2,5 @@
        Test unauthenticated connection (should fail)
        disconnected 0 controller(s)
        Test authenticated connection
       -disconnected 1 controller(s)
       +disconnected 0 controller(s)
        Test complete

    nvme/044 had same failure symptom until the kernel v6.9. A solution was
    suggested and discussed in Feb/2024 [4].

    [4] https://lore.kernel.org/linux-nvme/20240221132404.6311-1-dwagner@xxxxxxx/

#2: nvme/050

    The test case fails occasionally with a QEMU NVME device. The failure cause
    is the lockdep WARN among ctrl->namespaces_rwsem, dev->shutdown_lock and
    workqueue work completion. After LSF 2024 discussion, Sagi and Keith worked
    on the solution and Keith provided the fix [5]. Thank you!

    [5] https://lore.kernel.org/linux-nvme/20240524155345.243814-1-kbusch@xxxxxxxx/





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