The NVMe over Fabrics tests (nvmftests) for Tumbleweed trigger a kernel warning
since build 20180404 - see https://openqa.opensuse.org/tests/651410
[ 221.136034] WARNING: CPU: 0 PID: 4595 at ../block/blk-mq.c:534
__blk_mq_complete_request+0x105/0x180
[ 221.142336] Modules linked in: nvme_loop nvme_fabrics nvmet loop configfs
af_packet xt_tcpudp ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 ipt_REJECT
nf_reject_ipv4 xt_conntrack ip_set nfnetlink ebtable_nat ebtable_broute bridge
stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6
ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_conntrack_ipv4
nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack libcrc32c iptable_mangle
iptable_raw iptable_security ebtable_filter ebtables ip6table_filter ip6_tables
iscsi_ibft iscsi_boot_sysfs iptable_filter ip_tables x_tables cirrus ttm
drm_kms_helper snd_intel8x0 snd_ac97_codec ac97_bus ppdev sr_mod cdrom snd_pcm
parport_pc parport drm snd_timer joydev virtio_net snd fb_sys_fops syscopyarea
sysfillrect soundcore i2c_piix4 sysimgblt button pcspkr
[ 221.159183] qemu_fw_cfg hid_generic usbhid btrfs xor zstd_decompress
zstd_compress xxhash ata_generic raid6_pq ehci_pci ehci_hcd serio_raw floppy
usbcore virtio_blk virtio_scsi ata_piix sg [last unloaded: loop]
[ 221.163247] CPU: 0 PID: 4595 Comm: dd Not tainted 4.16.1-1-default #1
openSUSE Tumbleweed (unreleased)
[ 221.165127] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.0.0-prebuilt.qemu-project.org 04/01/2014
[ 221.167140] RIP: 0010:__blk_mq_complete_request+0x105/0x180
[ 221.168503] RSP: 0018:ffff9d6e806539d0 EFLAGS: 00010297
[ 221.169813] RAX: 0000000000000000 RBX: ffff8cf06501c300 RCX:
0000000000000000
[ 221.171388] RDX: 0000000000000000 RSI: ffff9d6e806539f4 RDI:
ffff8cf06501c300
[ 221.172972] RBP: ffffbd6e7fc24d80 R08: ffff8cf053919300 R09:
0000000000000009
[ 221.174545] R10: ffff9d6e80653b60 R11: 0000000000003000 R12:
ffff8cf06ee686a0
[ 221.176117] R13: ffff8cf06501c4b8 R14: ffff8cf06b380200 R15:
ffff8cf06501c340
[ 221.177676] FS: 00007fcf2d793540(0000) GS:ffff8cf09fc00000(0000)
knlGS:0000000000000000
[ 221.179370] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 221.180756] CR2: 0000561129552f58 CR3: 0000000015cea000 CR4:
00000000000006f0
[ 221.182336] Call Trace:
[ 221.184300] blk_mq_complete_request+0x53/0x70
[ 221.185663] nvmet_req_init+0x85/0x130 [nvmet]
[ 221.186879] nvme_loop_queue_rq+0x87/0x210 [nvme_loop]
[ 221.188205] blk_mq_dispatch_rq_list+0x87/0x500
[ 221.189417] ? elv_rqhash_add+0x31/0x60
[ 221.190531] ? deadline_remove_request+0x49/0xb0
[ 221.191757] blk_mq_do_dispatch_sched+0x4f/0xd0
[ 221.192967] blk_mq_sched_dispatch_requests+0x107/0x170
[ 221.194268] __blk_mq_run_hw_queue+0x53/0xb0
[ 221.195438] __blk_mq_delay_run_hw_queue+0x83/0xa0
[ 221.196655] blk_mq_run_hw_queue+0x6c/0xd0
[ 221.197776] blk_mq_flush_plug_list+0x1d2/0x250
[ 221.198959] blk_flush_plug_list+0xcb/0x260
[ 221.200097] blk_finish_plug+0x27/0x40
[ 221.201170] __do_page_cache_readahead+0x1b6/0x260
[ 221.202378] ? ondemand_readahead+0x117/0x2c0
[ 221.203513] ondemand_readahead+0x117/0x2c0
[ 221.204623] generic_file_read_iter+0x6bc/0x930
[ 221.205783] ? aa_file_perm+0x196/0x310
[ 221.206848] __vfs_read+0xdb/0x140
[ 221.207855] vfs_read+0x89/0x130
[ 221.208817] SyS_read+0x42/0x90
[ 221.209755] do_syscall_64+0x76/0x140
[ 221.210758] entry_SYSCALL_64_after_hwframe+0x42/0xb7
[ 221.211960] RIP: 0033:0x7fcf2d2a7bc1
[ 221.212945] RSP: 002b:00007ffc2bf05aa8 EFLAGS: 00000246 ORIG_RAX:
0000000000000000
[ 221.214468] RAX: ffffffffffffffda RBX: 00005607baede400 RCX:
00007fcf2d2a7bc1
[ 221.215928] RDX: 0000000000001000 RSI: 00005607bb978000 RDI:
0000000000000000
[ 221.217372] RBP: 0000000000001000 R08: 0000000000000003 R09:
00007fcf2d576180
[ 221.218805] R10: 00000000000008c6 R11: 0000000000000246 R12:
00005607bb978000
[ 221.220231] R13: 0000000000000000 R14: 0000000000000000 R15:
00005607bb978000
[ 221.221636] Code: 00 80 e6 80 74 2c 8b 55 40 44 39 e2 75 3b 48 8b 80 c8 00
00 00 48 89 df e8 39 d9 61 00 65 ff 0d c2 04 c3 51 74 78 5b 5d 41 5c c3 <0f> 0b
e9 17 ff ff ff 8b 75 40 44 89 e7 e8 69 db cc ff 8b 55 40
[ 221.225065] ---[ end trace 1b245ab4a6088010 ]---
[ 221.226202] print_req_error: operation not supported error, dev nvme1c1n1,
sector 96160
[ 221.232617] nvme nvme1: rescanning
[ 224.310408] print_req_error: operation not supported error, dev nvme1c1n1,
sector 97184
[ 230.201454] print_req_error: operation not supported error, dev nvme1c1n1,
sector 96160
[ 230.208091] Buffer I/O error on dev nvme1n1, logical block 12020, async page
read
[ 243.521160] nvmet: ctrl 1 keep-alive timer (15 seconds) expired!
[ 243.528539] nvmet: ctrl 1 fatal error occurred!