[regression] blktests nvme/002 nvme/016 nvme/017 failed from v5.16-rc1

[Yi Zhang]

Hello
blktests[2] failed from v5.16-rc1, and the bisecting showed it was
introduced from [1], pls check it.

[1]
2953b30b1d9feb1bc555682e64e6479d197b9231 is the first bad commit
commit 2953b30b1d9feb1bc555682e64e6479d197b9231
Author: Hannes Reinecke <hare at suse.de>
Date:   Mon Oct 18 17:21:38 2021 +0200

    nvmet: register discovery subsystem as 'current'

    Register the discovery subsystem as the 'current' discovery subsystem,
    and add a new discovery log page entry for it.

    Signed-off-by: Hannes Reinecke <hare at suse.de>
    Signed-off-by: Christoph Hellwig <hch at lst.de>

 drivers/nvme/target/core.c      |  1 +
 drivers/nvme/target/discovery.c | 17 +++++++++++------
 2 files changed, 12 insertions(+), 6 deletions(-)

[2]
# ./check nvme/002 nvme/016 nvme/017
nvme/002 (create many subsystems and test discovery)         [failed]
    runtime  2.092s  ...  12.200s
    --- tests/nvme/002.out 2021-11-27 00:28:12.066040369 -0500
    +++ /root/blktests/results/nodev/nvme/002.out.bad 2021-11-27
07:31:13.452891961 -0500
    @@ -1,3003 +1,3006 @@
     Running nvme/002
    -Discovery Log Number of Records 1000, Generation counter X
    +Discovery Log Number of Records 1001, Generation counter X
     =====Discovery Log Entry 0======
     trtype:  loop
    -subnqn:  blktests-subsystem-0
    +subnqn:  nqn.2014-08.org.nvmexpress.discovery
    ...
    (Run 'diff -u tests/nvme/002.out
/root/blktests/results/nodev/nvme/002.out.bad' to see the entire diff)
nvme/016 (create/delete many NVMeOF block device-backed ns and test
discovery) [failed]
    runtime  7.444s  ...  7.894s
    --- tests/nvme/016.out 2021-11-27 00:28:12.069040481 -0500
    +++ /root/blktests/results/nodev/nvme/016.out.bad 2021-11-27
07:31:21.446186124 -0500
    @@ -1,6 +1,9 @@
     Running nvme/016
    -Discovery Log Number of Records 1, Generation counter X
    +Discovery Log Number of Records 2, Generation counter X
     =====Discovery Log Entry 0======
     trtype:  loop
    +subnqn:  nqn.2014-08.org.nvmexpress.discovery
    +=====Discovery Log Entry 1======
    ...
    (Run 'diff -u tests/nvme/016.out
/root/blktests/results/nodev/nvme/016.out.bad' to see the entire diff)
nvme/017 (create/delete many file-ns and test discovery)     [failed]
    runtime    ...  7.578s
    --- tests/nvme/017.out 2021-11-27 00:28:12.069040481 -0500
    +++ /root/blktests/results/nodev/nvme/017.out.bad 2021-11-27
07:31:29.103467922 -0500
    @@ -1,6 +1,9 @@
     Running nvme/017
    -Discovery Log Number of Records 1, Generation counter X
    +Discovery Log Number of Records 2, Generation counter X
     =====Discovery Log Entry 0======
     trtype:  loop
    +subnqn:  nqn.2014-08.org.nvmexpress.discovery
    +=====Discovery Log Entry 1======
    ...
    (Run 'diff -u tests/nvme/017.out
/root/blktests/results/nodev/nvme/017.out.bad' to see the entire diff)