[powerpc][next-20210625] WARN block/mq-deadline-main.c:743 during boot

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While booting 5.13.0-rc7-next-20210625 on POWER9 LPAR following warning
is seen:

[    3.111826] device-mapper: multipath service-time: version 0.3.0 loaded
[    3.485799] ------------[ cut here ]------------
[    3.485809] WARNING: CPU: 9 PID: 225 at block/mq-deadline-main.c:743 dd_insert_requests+0x460/0x4a0
[    3.485819] Modules linked in: dm_service_time sd_mod t10_pi sg ibmvfc scsi_transport_fc ibmveth dm_multipath dm_mirror dm_region_hash dm_log dm_mod fuse
[    3.485836] CPU: 9 PID: 225 Comm: kworker/9:1H Not tainted 5.13.0-rc7-next-20210625 #3
[    3.485842] Workqueue: kblockd blk_mq_requeue_work
[    3.485848] NIP:  c0000000006a5c20 LR: c0000000006a5958 CTR: c0000000006a57c0
[    3.485852] REGS: c000000009d2f800 TRAP: 0700   Not tainted  (5.13.0-rc7-next-20210625)
[    3.485857] MSR:  800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  CR: 24004828  XER: 00000001
[    3.485871] CFAR: c0000000006a5964 IRQMASK: 0 
[    3.485871] GPR00: c0000000006a5920 c000000009d2faa0 c000000001adb700 0000000000000000 
[    3.485871] GPR04: c000000028750048 c000000028750048 0000000000000000 c000000028750048 
[    3.485871] GPR08: 0000000000000020 c000000009530400 0000000000000024 0000000000000007 
[    3.485871] GPR12: 0000000000002000 c00000001ec53280 c00000000018bb48 c000000009530400 
[    3.485871] GPR16: 0000000000000000 c000000028750000 0000000c00002204 c00000000d77512c 
[    3.485871] GPR20: c00000000d775000 000000000004001a c000000000d96928 c00000002ea4e400 
[    3.485871] GPR24: c00000002e190000 0000000000000003 c000000009d2fb98 c000000009d2fac8 
[    3.485871] GPR28: c00000000d775000 0000000000000001 0000000000080700 c000000028750048 
[    3.485925] NIP [c0000000006a5c20] dd_insert_requests+0x460/0x4a0
[    3.485930] LR [c0000000006a5958] dd_insert_requests+0x198/0x4a0
[    3.485935] Call Trace:
[    3.485937] [c000000009d2faa0] [c00000000001e528] __switch_to+0x2c8/0x480 (unreliable)
[    3.485945] [c000000009d2fb70] [c00000000068550c] blk_mq_sched_insert_request+0xfc/0x210
[    3.485951] [c000000009d2fbf0] [c00000000067d314] blk_mq_requeue_work+0x174/0x250
[    3.485958] [c000000009d2fc60] [c00000000017f634] process_one_work+0x264/0x540
[    3.485964] [c000000009d2fd00] [c00000000017f998] worker_thread+0x88/0x630
[    3.485970] [c000000009d2fda0] [c00000000018bcd4] kthread+0x194/0x1a0
[    3.485976] [c000000009d2fe10] [c00000000000c750] ret_from_kernel_thread+0x5c/0x6c
[    3.485983] Instruction dump:
[    3.485986] 7ea94838 2f890000 409eff64 7e248b78 7f03c378 4bfbd0dd 60000000 e9380000 
[    3.485996] 2fa90000 409eff48 fa380000 4bffff40 <0fe00000> 4bfffd44 60000000 60000000 
[    3.486005] ---[ end trace 42319989f7cb8ff4 ]---
[  OK  ] Found device /dev/disk/by-uuid/186c6f84-531c-4570-89cc-6490f20090e9.

Last known tested & working build was 5.13.0-rc6-next-20210618.

This problem seems to be introduced with

commit 08a9ad8bf60738
       block/mq-deadline: Add cgroup support

Reverting this patch allows the kernel to boot without the mentioned warning.

Have attached the boot log. IOSCHED_DEADLINE is set to yes.

CONFIG_MQ_IOSCHED_DEADLINE=y
CONFIG_MQ_IOSCHED_KYBER=y
# CONFIG_IOSCHED_BFQ is not set
# end of IO Schedulers

Thanks
-Sachin

[    0.000000] crashkernel: memory value expected
[    0.000000] hash-mmu: Page sizes from device-tree:
[    0.000000] hash-mmu: base_shift=12: shift=12, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=0
[    0.000000] hash-mmu: base_shift=12: shift=16, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=7
[    0.000000] hash-mmu: base_shift=12: shift=24, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=56
[    0.000000] hash-mmu: base_shift=16: shift=16, sllp=0x0110, avpnm=0x00000000, tlbiel=1, penc=1
[    0.000000] hash-mmu: base_shift=16: shift=24, sllp=0x0110, avpnm=0x00000000, tlbiel=1, penc=8
[    0.000000] hash-mmu: base_shift=24: shift=24, sllp=0x0100, avpnm=0x00000001, tlbiel=0, penc=0
[    0.000000] hash-mmu: base_shift=34: shift=34, sllp=0x0120, avpnm=0x000007ff, tlbiel=0, penc=3
[    0.000000] Enabling pkeys with max key count 31
[    0.000000] Activating Kernel Userspace Execution Prevention
[    0.000000] Activating Kernel Userspace Access Prevention
[    0.000000] Page orders: linear mapping = 24, virtual = 16, io = 16, vmemmap = 24
[    0.000000] Using 1TB segments
[    0.000000] hash-mmu: Initializing hash mmu with SLB
[    0.000000] Linux version 5.13.0-rc7-next-20210625 (root@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc (GCC) 8.4.1 20200928 (Red Hat 8.4.1-1), GNU ld version 2.30-93.el8) #1 SMP Sun Jun 27 06:16:48 EDT 2021
[    0.000000] Found initrd at 0xc00000000c700000:0xc000000010d05c11
[    0.000000] Using pSeries machine description
[    0.000000] printk: bootconsole [udbg0] enabled
[    0.000000] Partition configured for 16 cpus.
[    0.000000] CPU maps initialized for 8 threads per core
[    0.000000]  (thread shift is 3)
[    0.000000] Allocated 4608 bytes for 16 pacas
[    0.000000] -----------------------------------------------------
[    0.000000] phys_mem_size     = 0xa00000000
[    0.000000] dcache_bsize      = 0x80
[    0.000000] icache_bsize      = 0x80
[    0.000000] cpu_features      = 0x0001c07b8f5f9187
[    0.000000]   possible        = 0x000ffbfbcf5fb187
[    0.000000]   always          = 0x0000000380008181
[    0.000000] cpu_user_features = 0xdc0065c2 0xeff00000
[    0.000000] mmu_features      = 0x7c006e01
[    0.000000] firmware_features = 0x0000009fc45bfc57
[    0.000000] vmalloc start     = 0xc008000000000000
[    0.000000] IO start          = 0xc00a000000000000
[    0.000000] vmemmap start     = 0xc00c000000000000
[    0.000000] hash-mmu: ppc64_pft_size    = 0x1d
[    0.000000] hash-mmu: htab_hash_mask    = 0x3fffff
[    0.000000] -----------------------------------------------------
[    0.000000] numa:   NODE_DATA [mem 0x9fff5ef80-0x9fff63fff]
[    0.000000] rfi-flush: fallback displacement flush available
[    0.000000] rfi-flush: mttrig type flush available
[    0.000000] rfi-flush: patched 14 locations (mttrig type flush)
[    0.000000] count-cache-flush: software flush enabled.
[    0.000000] link-stack-flush: software flush enabled.
[    0.000000] entry-flush: patched 61 locations (mttrig type flush)
[    0.000000] uaccess-flush: patched 1 locations (mttrig type flush)
[    0.000000] stf-barrier: eieio barrier available
[    0.000000] stf-barrier: patched 61 entry locations (eieio barrier)
[    0.000000] stf-barrier: patched 14 exit locations (eieio barrier)
[    0.000000] lpar: H_BLOCK_REMOVE supports base psize:0 psize:0 block size:8
[    0.000000] lpar: H_BLOCK_REMOVE supports base psize:0 psize:2 block size:8
[    0.000000] lpar: H_BLOCK_REMOVE supports base psize:0 psize:10 block size:8
[    0.000000] lpar: H_BLOCK_REMOVE supports base psize:2 psize:2 block size:8
[    0.000000] lpar: H_BLOCK_REMOVE supports base psize:2 psize:10 block size:8
[    0.000000] PPC64 nvram contains 15360 bytes
[    0.000000] barrier-nospec: using ORI speculation barrier
[    0.000000] barrier-nospec: patched 390 locations
[    0.000000] Top of RAM: 0xa00000000, Total RAM: 0xa00000000
[    0.000000] Memory hole size: 0MB
[    0.000000] Zone ranges:
[    0.000000]   Normal   [mem 0x0000000000000000-0x00000009ffffffff]
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   7: [mem 0x0000000000000000-0x00000009ffffffff]
[    0.000000] Initmem setup node 7 [mem 0x0000000000000000-0x00000009ffffffff]
[    0.000000] percpu: Embedded 10 pages/cpu s605976 r0 d49384 u1048576
[    0.000000] pcpu-alloc: s605976 r0 d49384 u1048576 alloc=1*1048576
[    0.000000] pcpu-alloc: [0] 00 [0] 01 [0] 02 [0] 03 [0] 04 [0] 05 [0] 06 [0] 07 
[    0.000000] pcpu-alloc: [0] 08 [0] 09 [0] 10 [0] 11 [0] 12 [0] 13 [0] 14 [0] 15 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 654720
[    0.000000] Policy zone: Normal
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.13.0-rc7-next-20210625 root=UUID=186c6f84-531c-4570-89cc-6490f20090e9 ro crashkernel=auto biosdevname=0
[    0.000000] Unknown command line parameters: BOOT_IMAGE=/boot/vmlinuz-5.13.0-rc7-next-20210625 crashkernel=auto biosdevname=0
[    0.000000] Dentry cache hash table entries: 8388608 (order: 10, 67108864 bytes, linear)
[    0.000000] Inode-cache hash table entries: 4194304 (order: 9, 33554432 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 41585600K/41943040K available (13376K kernel code, 5440K rwdata, 4096K rodata, 4992K init, 2929K bss, 357440K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=128, Order=0-3, MinObjects=0, CPUs=16, Nodes=8
[    0.000000] ftrace: allocating 33185 entries in 13 pages
[    0.000000] ftrace: allocated 13 pages with 3 groups
[    0.000000] trace event string verifier disabled
[    0.000000] rcu: Hierarchical RCU implementation.
[    0.000000] rcu: 	RCU restricting CPUs from NR_CPUS=2048 to nr_cpu_ids=16.
[    0.000000] 	Rude variant of Tasks RCU enabled.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=16
[    0.000000] NR_IRQS: 512, nr_irqs: 512, preallocated irqs: 16
[    0.000000] pic: no ISA interrupt controller
[    0.000000] rcu: 	Offload RCU callbacks from CPUs: (none).
[    0.000000] random: get_random_u64 called from start_kernel+0x9b0/0xc10 with crng_init=0
[    0.000000] time_init: decrementer frequency = 512.000000 MHz
[    0.000000] time_init: processor frequency   = 3150.000000 MHz
[    0.000001] time_init: 56 bit decrementer (max: 7fffffffffffff)
[    0.000024] clocksource: timebase: mask: 0xffffffffffffffff max_cycles: 0x761537d007, max_idle_ns: 440795202126 ns
[    0.000064] clocksource: timebase mult[1f40000] shift[24] registered
[    0.000090] clockevent: decrementer mult[83126f] shift[24] cpu[0]
[    0.000118] Console: colour dummy device 80x25
[    0.000137] printk: console [hvc0] enabled
[    0.000155] printk: bootconsole [udbg0] disabled
[    0.000189] pid_max: default: 32768 minimum: 301
[    0.000213] LSM: Security Framework initializing
[    0.000222] Yama: becoming mindful.
[    0.000228] SELinux:  Initializing.
[    0.000308] Mount-cache hash table entries: 131072 (order: 4, 1048576 bytes, linear)
[    0.000365] Mountpoint-cache hash table entries: 131072 (order: 4, 1048576 bytes, linear)
[    0.000751] POWER9 performance monitor hardware support registered
[    0.000772] rcu: Hierarchical SRCU implementation.
[    0.001358] smp: Bringing up secondary CPUs ...
[    0.005415] smp: Brought up 1 node, 16 CPUs
[    0.005423] numa: Node 7 CPUs: 0-15
[    0.005428] Big cores detected but using small core scheduling
[    0.005867] devtmpfs: initialized
[    0.031559] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.031568] futex hash table entries: 4096 (order: 3, 524288 bytes, linear)
[    0.031756] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[    0.031848] audit: initializing netlink subsys (disabled)
[    0.031905] audit: type=2000 audit(1624791942.030:1): state=initialized audit_enabled=0 res=1
[    0.031956] thermal_sys: Registered thermal governor 'fair_share'
[    0.031958] thermal_sys: Registered thermal governor 'step_wise'
[    0.032011] cpuidle: using governor menu
[    0.032079] RTAS daemon started
[    0.032184] pstore: Registered nvram as persistent store backend
[    0.032761] EEH: pSeries platform initialized
[    0.039808] PCI: Probing PCI hardware
[    0.039812] EEH: No capable adapters found: recovery disabled.
[    0.039815] PCI: Probing PCI hardware done
[    0.039916] pseries-rng: Registering arch random hook.
[    0.041026] Kprobes globally optimized
[    0.041194] HugeTLB registered 16.0 MiB page size, pre-allocated 0 pages
[    0.041199] HugeTLB registered 16.0 GiB page size, pre-allocated 0 pages
[    0.072269] wait_for_initramfs() called before rootfs_initcalls
[    0.075230] iommu: Default domain type: Translated 
[    0.075279] vgaarb: loaded
[    0.075346] SCSI subsystem initialized
[    0.075376] usbcore: registered new interface driver usbfs
[    0.075386] usbcore: registered new interface driver hub
[    0.075396] usbcore: registered new device driver usb
[    0.075460] EDAC MC: Ver: 3.0.0
[    0.075653] NetLabel: Initializing
[    0.075656] NetLabel:  domain hash size = 128
[    0.075659] NetLabel:  protocols = UNLABELED CIPSOv4 CALIPSO
[    0.075673] NetLabel:  unlabeled traffic allowed by default
[    0.075788] clocksource: Switched to clocksource timebase
[    0.085323] VFS: Disk quotas dquot_6.6.0
[    0.085343] VFS: Dquot-cache hash table entries: 8192 (order 0, 65536 bytes)
[    0.086435] random: fast init done
[    0.087364] NET: Registered PF_INET protocol family
[    0.087487] IP idents hash table entries: 262144 (order: 5, 2097152 bytes, linear)
[    0.089972] tcp_listen_portaddr_hash hash table entries: 32768 (order: 3, 524288 bytes, linear)
[    0.090031] TCP established hash table entries: 524288 (order: 6, 4194304 bytes, linear)
[    0.090872] TCP bind hash table entries: 65536 (order: 4, 1048576 bytes, linear)
[    0.090960] TCP: Hash tables configured (established 524288 bind 65536)
[    0.090991] UDP hash table entries: 32768 (order: 4, 1048576 bytes, linear)
[    0.091101] UDP-Lite hash table entries: 32768 (order: 4, 1048576 bytes, linear)
[    0.091241] NET: Registered PF_UNIX/PF_LOCAL protocol family
[    0.091248] PCI: CLS 0 bytes, default 128
[    0.091287] Trying to unpack rootfs image as initramfs...
[    0.091950] IOMMU table initialized, virtual merging enabled
[    0.111223] vas: API is supported only with radix page tables
[    0.112396] hv-24x7: read 1530 catalog entries, created 509 event attrs (0 failures), 275 descs
[    0.114351] Initialise system trusted keyrings
[    0.114401] workingset: timestamp_bits=38 max_order=20 bucket_order=0
[    0.115661] zbud: loaded
[    0.134910] NET: Registered PF_ALG protocol family
[    0.134916] Key type asymmetric registered
[    0.134920] Asymmetric key parser 'x509' registered
[    0.134927] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 248)
[    0.134971] io scheduler mq-deadline registered
[    0.134976] io scheduler kyber registered
[    0.135283] atomic64_test: passed
[    0.135323] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
[    0.135632] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.135882] Non-volatile memory driver v1.3
[    0.135910] Linux agpgart interface v0.103
[    0.136136] tpm_ibmvtpm 30000003: CRQ initialization completed
[    1.085686] Freeing initrd memory: 71680K
[    1.206495] rdac: device handler registered
[    1.206534] hp_sw: device handler registered
[    1.206537] emc: device handler registered
[    1.206572] alua: device handler registered
[    1.206668] libphy: Fixed MDIO Bus: probed
[    1.206710] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.206722] ehci-pci: EHCI PCI platform driver
[    1.206731] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.206740] ohci-pci: OHCI PCI platform driver
[    1.206747] uhci_hcd: USB Universal Host Controller Interface driver
[    1.206782] usbcore: registered new interface driver usbserial_generic
[    1.206789] usbserial: USB Serial support registered for generic
[    1.206845] mousedev: PS/2 mouse device common for all mice
[    1.206945] rtc-generic rtc-generic: registered as rtc0
[    1.206998] rtc-generic rtc-generic: setting system clock to 2021-06-27T11:05:43 UTC (1624791943)
[    1.207079] xcede: xcede_record_size = 10
[    1.207082] xcede: Record 0 : hint = 1, latency = 0x400 tb ticks, Wake-on-irq = 1
[    1.207086] xcede: Record 1 : hint = 2, latency = 0x3e8000 tb ticks, Wake-on-irq = 0
[    1.207090] cpuidle: Skipping the 2 Extended CEDE idle states
[    1.207093] cpuidle: Fixed up CEDE exit latency to 1 us
[    1.207260] pseries_idle_driver registered
[    1.207280] nx_compress_pseries ibm,compression-v1: nx842_OF_upd: max_sync_size new:65536 old:0
[    1.207285] nx_compress_pseries ibm,compression-v1: nx842_OF_upd: max_sync_sg new:510 old:0
[    1.207290] nx_compress_pseries ibm,compression-v1: nx842_OF_upd: max_sg_len new:4080 old:0
[    1.207328] alg: No test for 842 (842-nx)
[    1.207352] NX-GZIP is not supported. Returned=-524
[    1.207371] hid: raw HID events driver (C) Jiri Kosina
[    1.207463] usbcore: registered new interface driver usbhid
[    1.207466] usbhid: USB HID core driver
[    1.207479] drop_monitor: Initializing network drop monitor service
[    1.207534] Initializing XFRM netlink socket
[    1.207610] NET: Registered PF_INET6 protocol family
[    1.207799] Segment Routing with IPv6
[    1.207815] NET: Registered PF_PACKET protocol family
[    1.207820] mpls_gso: MPLS GSO support
[    1.207890] Running MSI bitmap self-tests ...
[    1.208529] registered taskstats version 1
[    1.208541] Loading compiled-in X.509 certificates
[    1.210917] alg: No test for pkcs1pad(rsa,sha1) (pkcs1pad(rsa-generic,sha1))
[    1.211522] Loaded X.509 cert 'Build time autogenerated kernel key: 0f27eafbb5f2c161086ea66b5cf058fe022f9e54'
[    1.211574] zswap: loaded using pool lzo/zbud
[    1.211672] pstore: Using crash dump compression: deflate
[    1.212994] Freeing unused kernel image (initmem) memory: 4992K
[    1.212999] Kernel memory protection not selected by kernel config.
[    1.213005] Run /init as init process
[    1.213008]   with arguments:
[    1.213009]     /init
[    1.213011]   with environment:
[    1.213011]     HOME=/
[    1.213012]     TERM=linux
[    1.213013]     BOOT_IMAGE=/boot/vmlinuz-5.13.0-rc7-next-20210625
[    1.213015]     crashkernel=auto
[    1.213016]     biosdevname=0
[    1.220578] systemd[1]: systemd 239 (239-45.el8) running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=legacy)
[    1.220694] systemd[1]: Detected architecture ppc64-le.
[    1.220700] systemd[1]: Running in initial RAM disk.
[    1.276398] systemd[1]: Set hostname to <ltcfleet2-lp13.aus.stglabs.ibm.com>.
[    1.324932] random: systemd: uninitialized urandom read (16 bytes read)
[    1.325004] systemd[1]: Listening on udev Kernel Socket.
[    1.325194] random: systemd: uninitialized urandom read (16 bytes read)
[    1.325205] systemd[1]: Reached target Timers.
[    1.325308] random: systemd: uninitialized urandom read (16 bytes read)
[    1.325409] systemd[1]: Listening on Journal Socket.
[    1.326607] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[    1.327362] systemd[1]: Starting Setup Virtual Console...
[    1.328109] systemd[1]: Started Hardware RNG Entropy Gatherer Daemon.
[    1.439732] fuse: init (API version 7.34)
[    1.541578] device-mapper: uevent: version 1.0.3
[    1.541657] device-mapper: ioctl: 4.45.0-ioctl (2021-03-22) initialised: dm-devel@xxxxxxxxxx
[    1.925623] synth uevent: /devices/vio: failed to send uevent
[    1.925650] vio vio: uevent: failed to send synthetic uevent
[    1.925823] synth uevent: /devices/vio/4000: failed to send uevent
[    1.925831] vio 4000: uevent: failed to send synthetic uevent
[    1.925850] synth uevent: /devices/vio/4001: failed to send uevent
[    1.925856] vio 4001: uevent: failed to send synthetic uevent
[    1.925881] synth uevent: /devices/vio/4002: failed to send uevent
[    1.925888] vio 4002: uevent: failed to send synthetic uevent
[    1.925915] synth uevent: /devices/vio/4004: failed to send uevent
[    1.925923] vio 4004: uevent: failed to send synthetic uevent
[    2.084494] ibmveth: IBM Power Virtual Ethernet Driver 1.06
[    2.086264] ibmveth 30000002 env2: renamed from eth0
[    2.099854] ibmvfc: IBM Virtual Fibre Channel Driver version: 1.0.11 (April 12, 2013)
[    2.100403] scsi host0: IBM POWER Virtual FC Adapter
[    2.101472] ibmvfc 300004bd: Partner initialization complete
[    2.101943] scsi host1: IBM POWER Virtual FC Adapter
[    2.103112] ibmvfc 300008a5: Partner initialization complete
[    2.110937] ibmvfc 300004bd: Host partition: ltcfleet2-vios1, device: vfchost7 U78D5.ND1.CSS130E-P1-C2-C1-T1 U9080.M9S.130A098-V100-C1213 max sectors 2048
[    2.113277] ibmvfc 300008a5: Host partition: ltcfleet2-vios2, device: vfchost10 U78D5.ND2.CSS140C-P1-C2-C1-T1 U9080.M9S.130A098-V200-C2213 max sectors 2048
[    2.191711] scsi 0:0:0:0: Direct-Access     IBM      2145             0000 PQ: 0 ANSI: 6
[    2.192475] scsi 0:0:1:0: Direct-Access     IBM      2145             0000 PQ: 0 ANSI: 6
[    2.206687] scsi 1:0:0:0: Direct-Access     IBM      2145             0000 PQ: 0 ANSI: 6
[    2.207550] scsi 1:0:1:0: Direct-Access     IBM      2145             0000 PQ: 0 ANSI: 6
[    2.215833] scsi 0:0:0:0: alua: supports implicit TPGS
[    2.215841] scsi 0:0:0:0: alua: device naa.60050768028383d7f00000000000001f port group 0 rel port 80
[    2.215948] scsi 0:0:1:0: alua: supports implicit TPGS
[    2.215954] scsi 0:0:1:0: alua: device naa.60050768028383d7f00000000000001f port group 1 rel port 880
[    2.216058] scsi 1:0:0:0: alua: supports implicit TPGS
[    2.216063] scsi 1:0:0:0: alua: device naa.60050768028383d7f00000000000001f port group 0 rel port 80
[    2.216158] scsi 1:0:1:0: alua: supports implicit TPGS
[    2.216163] scsi 1:0:1:0: alua: device naa.60050768028383d7f00000000000001f port group 1 rel port 880
[    2.233836] scsi 0:0:0:0: Attached scsi generic sg0 type 0
[    2.233908] scsi 0:0:1:0: Attached scsi generic sg1 type 0
[    2.233971] scsi 1:0:0:0: Attached scsi generic sg2 type 0
[    2.234032] scsi 1:0:1:0: Attached scsi generic sg3 type 0
[    2.236764] scsi 0:0:1:0: Power-on or device reset occurred
[    2.236837] scsi 0:0:0:0: Power-on or device reset occurred
[    2.248623] sd 1:0:0:0: Power-on or device reset occurred
[    2.248649] sd 1:0:1:0: Power-on or device reset occurred
[    2.275942] sd 0:0:1:0: alua: transition timeout set to 60 seconds
[    2.275952] sd 0:0:1:0: alua: port group 01 state N non-preferred supports tolusna
[    2.275966] sd 0:0:0:0: alua: transition timeout set to 60 seconds
[    2.275972] sd 0:0:0:0: alua: port group 00 state A non-preferred supports tolusna
[    2.276425] sd 0:0:0:0: [sda] 209715200 512-byte logical blocks: (107 GB/100 GiB)
[    2.276426] sd 0:0:1:0: [sdb] 209715200 512-byte logical blocks: (107 GB/100 GiB)
[    2.276530] sd 0:0:0:0: [sda] Write Protect is off
[    2.276531] sd 0:0:1:0: [sdb] Write Protect is off
[    2.276535] sd 0:0:0:0: [sda] Mode Sense: 97 00 10 08
[    2.276538] sd 0:0:1:0: [sdb] Mode Sense: 97 00 10 08
[    2.276693] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, supports DPO and FUA
[    2.276711] sd 0:0:1:0: [sdb] Write cache: disabled, read cache: enabled, supports DPO and FUA
[    2.296361] sd 1:0:1:0: [sdd] 209715200 512-byte logical blocks: (107 GB/100 GiB)
[    2.296362] sd 1:0:0:0: [sdc] 209715200 512-byte logical blocks: (107 GB/100 GiB)
[    2.296461] sd 1:0:0:0: [sdc] Write Protect is off
[    2.296463] sd 1:0:1:0: [sdd] Write Protect is off
[    2.296468] sd 1:0:0:0: [sdc] Mode Sense: 97 00 10 08
[    2.296471] sd 1:0:1:0: [sdd] Mode Sense: 97 00 10 08
[    2.296671] sd 1:0:1:0: [sdd] Write cache: disabled, read cache: enabled, supports DPO and FUA
[    2.296671] sd 1:0:0:0: [sdc] Write cache: disabled, read cache: enabled, supports DPO and FUA
[    2.358146]  sda: sda1 sda2 sda3
[    2.359725] sd 0:0:0:0: [sda] Attached SCSI disk
[    2.402821]  sdb: sdb1 sdb2 sdb3
[    2.404314] sd 0:0:1:0: [sdb] Attached SCSI disk
[    2.408138]  sdc: sdc1 sdc2 sdc3
[    2.408323]  sdd: sdd1 sdd2 sdd3
[    2.410172] sd 1:0:0:0: [sdc] Attached SCSI disk
[    2.410333] sd 1:0:1:0: [sdd] Attached SCSI disk
[    2.787982] device-mapper: multipath service-time: version 0.3.0 loaded
[    3.086066] ------------[ cut here ]------------
[    3.086075] WARNING: CPU: 15 PID: 226 at block/mq-deadline-main.c:743 dd_insert_requests+0x460/0x4a0
[    3.086085] Modules linked in: dm_service_time sd_mod t10_pi sg ibmvfc scsi_transport_fc ibmveth dm_multipath dm_mirror dm_region_hash dm_log dm_mod fuse
[    3.086102] CPU: 15 PID: 226 Comm: kworker/15:1H Not tainted 5.13.0-rc7-next-20210625 #1
[    3.086109] Workqueue: kblockd blk_mq_requeue_work
[    3.086115] NIP:  c0000000006a4b40 LR: c0000000006a4878 CTR: c0000000006a46e0
[    3.086119] REGS: c00000002824f800 TRAP: 0700   Not tainted  (5.13.0-rc7-next-20210625)
[    3.086124] MSR:  800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  CR: 48004828  XER: 00000001
[    3.086138] CFAR: c0000000006a4884 IRQMASK: 0 
               GPR00: c0000000006a4840 c00000002824faa0 c000000001adb800 0000000000000000 
               GPR04: c00000000b5d0048 c00000000b5d0048 0000000000000000 c00000000b5d0048 
               GPR08: 0000000000000020 c000000009530400 0000000000000009 0000000000000007 
               GPR12: 0000000000002000 c00000001ec3a280 c00000000018bd38 c000000009530400 
               GPR16: 0000000000000000 c00000000b5d0000 0000000c00002204 c00000000baeb32c 
               GPR20: c00000000baeb200 000000000004001a c000000000d96928 c00000002d1a7400 
               GPR24: c000000029ca0000 0000000000000003 c00000002824fb98 c00000002824fac8 
               GPR28: c00000000baeb200 0000000000000001 0000000000080700 c00000000b5d0048 
[    3.086192] NIP [c0000000006a4b40] dd_insert_requests+0x460/0x4a0
[    3.086198] LR [c0000000006a4878] dd_insert_requests+0x198/0x4a0
[    3.086203] Call Trace:
[    3.086205] [c00000002824faa0] [c00000000001e608] __switch_to+0x2c8/0x480 (unreliable)
[    3.086212] [c00000002824fb70] [c0000000006846cc] blk_mq_sched_insert_request+0xfc/0x210
[    3.086219] [c00000002824fbf0] [c00000000067c4d4] blk_mq_requeue_work+0x174/0x250
[    3.086225] [c00000002824fc60] [c00000000017f814] process_one_work+0x264/0x540
[    3.086231] [c00000002824fd00] [c00000000017fb78] worker_thread+0x88/0x630
[    3.086237] [c00000002824fda0] [c00000000018bec4] kthread+0x194/0x1a0
[    3.086242] [c00000002824fe10] [c00000000000c750] ret_from_kernel_thread+0x5c/0x6c
[    3.086249] Instruction dump:
[    3.086252] 7ea94838 2f890000 409eff64 7e248b78 7f03c378 4bfbd35d 60000000 e9380000 
[    3.086261] 2fa90000 409eff48 fa380000 4bffff40 <0fe00000> 4bfffd44 60000000 60000000 
[    3.086271] ---[ end trace 146cb6ccf9618f87 ]---
[    3.503164] EXT4-fs (dm-2): mounted filesystem with ordered data mode. Opts: (null). Quota mode: none.
[    4.299787] random: crng init done
[    4.299797] random: 7 urandom warning(s) missed due to ratelimiting
[    4.360924] printk: systemd: 13 output lines suppressed due to ratelimiting
[    5.114418] SELinux:  Runtime disable is deprecated, use selinux=0 on the kernel cmdline.
[    5.114432] SELinux:  Disabled at runtime.
[    5.295807] audit: type=1404 audit(1624791947.580:2): enforcing=0 old_enforcing=0 auid=4294967295 ses=4294967295 enabled=0 old-enabled=1 lsm=selinux res=1
[    5.628450] systemd[1]: systemd 239 (239-45.el8) running in system mode. (+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN2 -IDN +PCRE2 default-hierarchy=legacy)
[    5.628558] systemd[1]: Detected architecture ppc64-le.
[    5.640381] systemd[1]: Set hostname to <ltcfleet2-lp13.aus.stglabs.ibm.com>.
[    7.560448] systemd[1]: systemd-journald.service: Succeeded.
[    7.561093] systemd[1]: initrd-switch-root.service: Succeeded.
[    7.561371] systemd[1]: Stopped Switch Root.
[    7.561877] systemd[1]: systemd-journald.service: Service has no hold-off time (RestartSec=0), scheduling restart.
[    7.561933] systemd[1]: systemd-journald.service: Scheduled restart job, restart counter is at 1.
[    7.561990] systemd[1]: Stopped Journal Service.
[    7.562726] systemd[1]: Starting Journal Service...
[    7.645456] EXT4-fs (dm-2): re-mounted. Opts: (null). Quota mode: none.
[    7.682451] Adding 10485696k swap on /dev/mapper/mpatha3.  Priority:-2 extents:1 across:10485696k FS
[    8.118997] synth uevent: /devices/vio: failed to send uevent
[    8.119008] vio vio: uevent: failed to send synthetic uevent
[    8.119675] synth uevent: /devices/vio/4000: failed to send uevent
[    8.119679] vio 4000: uevent: failed to send synthetic uevent
[    8.119692] synth uevent: /devices/vio/4001: failed to send uevent
[    8.119696] vio 4001: uevent: failed to send synthetic uevent
[    8.119708] synth uevent: /devices/vio/4002: failed to send uevent
[    8.119712] vio 4002: uevent: failed to send synthetic uevent
[    8.119724] synth uevent: /devices/vio/4004: failed to send uevent
[    8.119728] vio 4004: uevent: failed to send synthetic uevent
[    9.414602] pseries_rng: Registering IBM pSeries RNG driver
[   10.145804] ibmveth 30000002 net0: renamed from env2
[   11.327861] RPC: Registered named UNIX socket transport module.
[   11.327873] RPC: Registered udp transport module.
[   11.327876] RPC: Registered tcp transport module.
[   11.327879] RPC: Registered tcp NFSv4.1 backchannel transport module.

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