blktests failures with v6.8-rc1 kernel

[Shinichiro Kawasaki]

Hi all,

I ran the latest blktests (git hash: 4f6b3fc593bf) with the v6.8-rc1 kernel.
I observed three failures below, which are known for months.

Compared with the v6.7 kernel [1], there is no new failure. Also, the failure of
nvme/003 is no longer observed :) Thank you for the fix.

[1] https://lore.kernel.org/linux-block/74ytefsd7byav2bs5q3lr4yj7v3yfmbe4bvwo233bri7ufl7xe@btts3u37s4op/

List of failures
================
#1: block/011
#2: nvme/* (fc transport)
#3: srp/002, 011 (rdma_rxe driver)

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

#1: block/011

   The test case fails with NVME devices due to lockdep WARNING "possible
   circular locking dependency detected". Reported in Sep/2022 [2]. In LSF
   2023, it was noted that this failure should be fixed. A RFC fix patch was
   posted recently [3]. It still needs more discussion to be fixed.

   [2] https://lore.kernel.org/linux-block/20220930001943.zdbvolc3gkekfmcv@shindev/
   [3] https://lore.kernel.org/linux-nvme/20231213051704.783490-1-shinichiro.kawasaki@wdc.com/

#2: nvme/* (fc transport)

   With the trtype=fc configuration, tests run on the nvme test group hang.
   Daniel is driving fix work.

#3: srp/002, 011 (rdma_rxe driver)

   Test process hang is observed occasionally. Reported to the relevant mailing
   lists in Aug/2023 [4]. Blktests was modified to change the default driver
   from rdma_rxe to siw to avoid impacts on blktests users. The root cause is
   not yet understood.

   [4] https://lore.kernel.org/linux-rdma/18a3ae8c-145b-4c7f-a8f5-67840feeb98c@acm.org/T/#mee9882c2cfd0cfff33caa04e75418576f4c7a789