[sparc64] unable to boot git kernel / deadlock / cpu stall

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Hello!

Latest git kernels does not boot for me. Bisect log is the end of this email.

v4.20.0-rc1-00088-gea2c18e1044e boots ok.
v4.20.0-rc1-00089-gfa182a1fa97d does not boot.

Can someone look please? Thanks.

Boot log:

NOTICE: Entering OpenBoot.
NOTICE: Fetching Guest MD from HV.
NOTICE: Starting additional cpus.
NOTICE: Initializing LDC services.
NOTICE: Probing PCI devices.
NOTICE: Finished PCI probing.

SPARC T5-2, No Keyboard
Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
OpenBoot 4.38.12, 34.0000 GB memory available, Serial #83494642.
Ethernet address 0:14:4f:fa:6:f2, Host ID: 84fa06f2.



Boot device: vdisk1  File and args:
WARNING: Unsupported bootblk image, can not extract fcode

WARNING: Bootblk fcode extraction failed
GRUB Loading kernel....

                       GNU GRUB  version 2.02-2+sparc64.3

 +----------------------------------------------------------------------------+
 | Debian GNU/Linux, with Linux 4.20.0-06428-g00c569b567c7                    |
 | Debian GNU/Linux, with Linux 4.20.0                                        |
 | Debian GNU/Linux, with Linux 4.20.0-rc7-00274-g23203e3f34c9                |
 | Debian GNU/Linux, with Linux 4.20.0-rc7                                    |
 |*Debian GNU/Linux, with Linux 4.20.0-rc1-00089-gfa182a1fa97d                |
 | Debian GNU/Linux, with Linux 4.20.0-rc1-00088-gea2c18e1044e                |
 | Debian GNU/Linux, with Linux 4.19.0-1-sparc64-smp                          |
 | Debian GNU/Linux, with Linux 4.18.0-rc4                                    |
 | Debian GNU/Linux, with Linux 4.16.0                                        |
 |                                                                            |
 |                                                                            |
 |                                                                            |
 +----------------------------------------------------------------------------+

      Use the ^ and v keys to select which entry is highlighted.
      Press enter to boot the selected OS, `e' to edit the commands
      before booting or `c' for a command-line.


Loading Linux 4.20.0-rc1-00089-gfa182a1fa97d ...
Loading initial ramdisk ...

[    0.000018] PROMLIB: Sun IEEE Boot Prom 'OBP 4.38.12 2018/03/28 14:54'
[    0.000028] PROMLIB: Root node compatible: sun4v
[    0.000073] Linux version 4.20.0-rc1-00089-gfa182a1fa97d
(mator@ttip) (gcc version 7.4.0 (Debian 7.4.0-2)) #812 SMP Tue Jan 1
23:04:57 MSK 2019
[    0.000381] printk: bootconsole [earlyprom0] enabled
[    0.000432] ARCH: SUN4V
[    0.000482] Ethernet address: 00:14:4f:fa:06:f2
[    0.000533] MM: PAGE_OFFSET is 0xfff8000000000000 (max_phys_bits == 47)
[    0.000596] MM: VMALLOC [0x0000000100000000 --> 0x0006000000000000]
[    0.000657] MM: VMEMMAP [0x0006000000000000 --> 0x000c000000000000]
[    0.011416] Kernel: Using 5 locked TLB entries for main kernel image.
[    0.011497] Remapping the kernel...
[    0.011523] done.
[    0.040937] OF stdout device is: /virtual-devices@100/console@1
[    0.041004] PROM: Built device tree with 74449 bytes of memory.
[    0.041064] MDESC: Size is 30768 bytes.
[    0.041172] PLATFORM: banner-name [SPARC T5-2]
[    0.041220] PLATFORM: name [ORCL,SPARC-T5-2]
[    0.041267] PLATFORM: hostid [84fa06f2]
[    0.041310] PLATFORM: serial# [0035260e]
[    0.041352] PLATFORM: stick-frequency [3b9aca00]
[    0.041400] PLATFORM: mac-address [144ffa06f2]
[    0.041446] PLATFORM: watchdog-resolution [1000 ms]
[    0.041497] PLATFORM: watchdog-max-timeout [31536000000 ms]
[    0.041552] PLATFORM: max-cpus [1024]
[    0.041641] Top of RAM: 0x24af948000, Total RAM: 0x87f388000
[    0.041701] Memory hole size: 115461MB
[    0.045904] Allocated 40960 bytes for kernel page tables.
[    0.045991] Zone ranges:
[    0.046030]   Normal   [mem 0x0000000030400000-0x00000024af947fff]
[    0.046094] Movable zone start for each node
[    0.046138] Early memory node ranges
[    0.046180]   node   0: [mem 0x0000000030400000-0x000000006febffff]
[    0.046239]   node   0: [mem 0x000000006ff40000-0x000000006ff47fff]
[    0.046300]   node   0: [mem 0x0000000070000000-0x000000042fffffff]
[    0.046360]   node   0: [mem 0x0000002030000000-0x00000024af8b7fff]
[    0.046421]   node   0: [mem 0x00000024af940000-0x00000024af947fff]
[    0.053769] Zeroed struct page in unavailable ranges: 230112 pages
[    0.053777] Initmem setup node 0 [mem 0x0000000030400000-0x00000024af947fff]
[    0.251173] Booting Linux...
[    0.251257] CPU CAPS: [flush,stbar,swap,muldiv,v9,blkinit,n2,mul32]
[    0.251339] CPU CAPS: [div32,v8plus,popc,vis,vis2,ASIBlkInit,fmaf,vis3]
[    0.251416] CPU CAPS: [hpc,ima,pause,cbcond,aes,des,kasumi,camellia]
[    0.252492] CPU CAPS: [md5,sha1,sha256,sha512,mpmul,montmul,montsqr,crc32c]
[    0.303600] percpu: Embedded 20 pages/cpu @(____ptrval____) s122824
r8192 d32824 u262144
[    0.304684] SUN4V: Mondo queue sizes [cpu(131072) dev(16384) r(8192) nr(256)]
[    0.304994] Built 1 zonelists, mobility grouping on.  Total pages: 4415698
[    0.305082] Kernel command line:
BOOT_IMAGE=/vmlinuz-4.20.0-rc1-00089-gfa182a1fa97d root=/dev/vdiska2
ro zswap.enabled=1 elevator=deadline
[    0.307420] printk: log_buf_len individual max cpu contribution: 4096 bytes
[    0.307491] printk: log_buf_len total cpu_extra contributions: 1044480 bytes
[    0.307558] printk: log_buf_len min size: 131072 bytes
[    0.307929] printk: log_buf_len: 2097152 bytes
[    0.307981] printk: early log buf free: 125920(96%)
[    0.314307] Dentry cache hash table entries: 8388608 (order: 13,
67108864 bytes)
[    0.317544] Inode-cache hash table entries: 4194304 (order: 12,
33554432 bytes)
[    0.317615] Sorting __ex_table...
[    0.396371] Memory: 35119672K/35638816K available (6200K kernel
code, 831K rwdata, 1848K rodata, 888K init, 7997K bss, 519144K
reserved, 0K cma-reserved)
[    0.396690] kmemleak: Kernel memory leak detector disabled
[    0.398175] ftrace: allocating 18918 entries in 37 pages
[    0.411784] Running RCU self tests
[    0.411829] rcu: Hierarchical RCU implementation.
[    0.411877] rcu:     RCU event tracing is enabled.
[    0.411926] rcu:     RCU lockdep checking is enabled.
[    0.411975]  Tasks RCU enabled.
[    0.412013] rcu: RCU calculated value of scheduler-enlistment delay
is 11 jiffies.
[    0.417162] NR_IRQS: 2048, nr_irqs: 2048, preallocated irqs: 1
[    0.417246] SUN4V: Using IRQ API major 3, cookie only virqs enabled
[    0.421376] clocksource: stick: mask: 0xffffffffffffffff
max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.421511] clocksource: mult[800000] shift[23]
[    0.421560] clockevent: mult[80000000] shift[31]
[    0.425949] Console: colour dummy device 80x25
[    0.426014] printk: console [tty0] enabled
[    0.426088] printk: bootconsole [earlyprom0] disabled
[    0.000018] PROMLIB: Sun IEEE Boot Prom 'OBP 4.38.12 2018/03/28 14:54'
[    0.000028] PROMLIB: Root node compatible: sun4v
[    0.000073] Linux version 4.20.0-rc1-00089-gfa182a1fa97d
(mator@ttip) (gcc version 7.4.0 (Debian 7.4.0-2)) #812 SMP Tue Jan 1
23:04:57 MSK 2019
[    0.000381] printk: bootconsole [earlyprom0] enabled
[    0.000432] ARCH: SUN4V
[    0.000482] Ethernet address: 00:14:4f:fa:06:f2
[    0.000533] MM: PAGE_OFFSET is 0xfff8000000000000 (max_phys_bits == 47)
[    0.000596] MM: VMALLOC [0x0000000100000000 --> 0x0006000000000000]
[    0.000657] MM: VMEMMAP [0x0006000000000000 --> 0x000c000000000000]
[    0.011416] Kernel: Using 5 locked TLB entries for main kernel image.
[    0.011497] Remapping the kernel...
[    0.011523] done.
[    0.040937] OF stdout device is: /virtual-devices@100/console@1
[    0.041004] PROM: Built device tree with 74449 bytes of memory.
[    0.041064] MDESC: Size is 30768 bytes.
[    0.041172] PLATFORM: banner-name [SPARC T5-2]
[    0.041220] PLATFORM: name [ORCL,SPARC-T5-2]
[    0.041267] PLATFORM: hostid [84fa06f2]
[    0.041310] PLATFORM: serial# [0035260e]
[    0.041352] PLATFORM: stick-frequency [3b9aca00]
[    0.041400] PLATFORM: mac-address [144ffa06f2]
[    0.041446] PLATFORM: watchdog-resolution [1000 ms]
[    0.041497] PLATFORM: watchdog-max-timeout [31536000000 ms]
[    0.041552] PLATFORM: max-cpus [1024]
[    0.041641] Top of RAM: 0x24af948000, Total RAM: 0x87f388000
[    0.041701] Memory hole size: 115461MB
[    0.045904] Allocated 40960 bytes for kernel page tables.
[    0.045991] Zone ranges:
[    0.046030]   Normal   [mem 0x0000000030400000-0x00000024af947fff]
[    0.046094] Movable zone start for each node
[    0.046138] Early memory node ranges
[    0.046180]   node   0: [mem 0x0000000030400000-0x000000006febffff]
[    0.046239]   node   0: [mem 0x000000006ff40000-0x000000006ff47fff]
[    0.046300]   node   0: [mem 0x0000000070000000-0x000000042fffffff]
[    0.046360]   node   0: [mem 0x0000002030000000-0x00000024af8b7fff]
[    0.046421]   node   0: [mem 0x00000024af940000-0x00000024af947fff]
[    0.053769] Zeroed struct page in unavailable ranges: 230112 pages
[    0.053777] Initmem setup node 0 [mem 0x0000000030400000-0x00000024af947fff]
[    0.251173] Booting Linux...
[    0.251257] CPU CAPS: [flush,stbar,swap,muldiv,v9,blkinit,n2,mul32]
[    0.251339] CPU CAPS: [div32,v8plus,popc,vis,vis2,ASIBlkInit,fmaf,vis3]
[    0.251416] CPU CAPS: [hpc,ima,pause,cbcond,aes,des,kasumi,camellia]
[    0.252492] CPU CAPS: [md5,sha1,sha256,sha512,mpmul,montmul,montsqr,crc32c]
[    0.303600] percpu: Embedded 20 pages/cpu @(____ptrval____) s122824
r8192 d32824 u262144
[    0.304684] SUN4V: Mondo queue sizes [cpu(131072) dev(16384) r(8192) nr(256)]
[    0.304994] Built 1 zonelists, mobility grouping on.  Total pages: 4415698
[    0.305082] Kernel command line:
BOOT_IMAGE=/vmlinuz-4.20.0-rc1-00089-gfa182a1fa97d root=/dev/vdiska2
ro zswap.enabled=1 elevator=deadline
[    0.307420] printk: log_buf_len individual max cpu contribution: 4096 bytes
[    0.307491] printk: log_buf_len total cpu_extra contributions: 1044480 bytes
[    0.307558] printk: log_buf_len min size: 131072 bytes
[    0.307929] printk: log_buf_len: 2097152 bytes
[    0.307981] printk: early log buf free: 125920(96%)
[    0.314307] Dentry cache hash table entries: 8388608 (order: 13,
67108864 bytes)
[    0.317544] Inode-cache hash table entries: 4194304 (order: 12,
33554432 bytes)
[    0.317615] Sorting __ex_table...
[    0.396371] Memory: 35119672K/35638816K available (6200K kernel
code, 831K rwdata, 1848K rodata, 888K init, 7997K bss, 519144K
reserved, 0K cma-reserved)
[    0.396690] kmemleak: Kernel memory leak detector disabled
[    0.398175] ftrace: allocating 18918 entries in 37 pages
[    0.411784] Running RCU self tests
[    0.411829] rcu: Hierarchical RCU implementation.
[    0.411877] rcu:     RCU event tracing is enabled.
[    0.411926] rcu:     RCU lockdep checking is enabled.
[    0.411975]  Tasks RCU enabled.
[    0.412013] rcu: RCU calculated value of scheduler-enlistment delay
is 11 jiffies.
[    0.417162] NR_IRQS: 2048, nr_irqs: 2048, preallocated irqs: 1
[    0.417246] SUN4V: Using IRQ API major 3, cookie only virqs enabled
[    0.421376] clocksource: stick: mask: 0xffffffffffffffff
max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.421511] clocksource: mult[800000] shift[23]
[    0.421560] clockevent: mult[80000000] shift[31]
[    0.425949] Console: colour dummy device 80x25
[    0.426014] printk: console [tty0] enabled
[    0.426088] printk: bootconsole [earlyprom0] disabled
[    0.426170] Lock dependency validator: Copyright (c) 2006 Red Hat,
Inc., Ingo Molnar
[    0.426216] ... MAX_LOCKDEP_SUBCLASSES:  8
[    0.426244] ... MAX_LOCK_DEPTH:          48
[    0.426273] ... MAX_LOCKDEP_KEYS:        8191
[    0.426302] ... CLASSHASH_SIZE:          4096
[    0.426331] ... MAX_LOCKDEP_ENTRIES:     16384
[    0.426360] ... MAX_LOCKDEP_CHAINS:      32768
[    0.426390] ... CHAINHASH_SIZE:          16384
[    0.426419]  memory used by lock dependency info: 4959 kB
[    0.426453]  per task-struct memory footprint: 1920 bytes
[    0.426684] kmemleak: Early log buffer exceeded (36609), please
increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE
[    0.571798] Calibrating delay using timer specific routine..
2004.20 BogoMIPS (lpj=10021012)
[    0.571859] pid_max: default: 262144 minimum: 2048
[    0.573036] LSM: Security Framework initializing
[    0.573077] AppArmor: AppArmor disabled by boot time parameter
[    0.573741] Mount-cache hash table entries: 131072 (order: 7, 1048576 bytes)
[    0.573898] Mountpoint-cache hash table entries: 131072 (order: 7,
1048576 bytes)
[    0.578665] rcu: Hierarchical SRCU implementation.
[    0.601054] smp: Bringing up secondary CPUs ...
[    0.661314] smp: Brought up 1 node, 24 CPUs
[    0.665369] devtmpfs: initialized
[    0.670917] Performance events:
[    0.670949] Testing NMI watchdog ...
[    0.871044] OK.
[    0.871175] Supported PMU type is 'niagara5'
[    0.871470] random: get_random_u32 called from
bucket_table_alloc.isra.4+0x144/0x1c0 with crng_init=0
[    0.872211] ldc.c:v1.1 (July 22, 2008)
[    0.874973] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.875061] futex hash table entries: 65536 (order: 10, 8388608 bytes)
[    0.884956] NET: Registered protocol family 16
[    0.894034] VIO: Adding device channel-devices (tx_ino =
ffffffffffffffff, rx_ino = ffffffffffffffff)
[    0.894257] VIO: Adding device vnet-port-0-0 (tx_ino = 0, rx_ino = 1)
[    0.894478] VIO: Adding device vnet-port-0-1 (tx_ino = 2, rx_ino = 3)
[    0.894671] VIO: Adding device vnet-port-0-2 (tx_ino = 4, rx_ino = 5)
[    0.894857] VIO: Adding device vnet-port-0-3 (tx_ino = 6, rx_ino = 7)
[    0.895049] VIO: Adding device vnet-port-0-4 (tx_ino = 8, rx_ino = 9)
[    0.895233] VIO: Adding device vdc-port-3-0 (tx_ino = a, rx_ino = b)
[    0.895424] VIO: Adding device vdc-port-2-0 (tx_ino = c, rx_ino = d)
[    0.895614] VIO: Adding device vdc-port-1-0 (tx_ino = e, rx_ino = f)
[    0.895800] VIO: Adding device vdc-port-0-0 (tx_ino = 10, rx_ino = 11)
[    0.895992] VIO: Adding device vlds-port-0-0 (tx_ino = 12, rx_ino = 13)
[    0.896185] VIO: Adding device domain-services-port-0 (tx_ino = 12,
rx_ino = 13)
[    0.896569] audit: initializing netlink subsys (disabled)
[    0.896887] audit: type=2000 audit(0.470:1): state=initialized
audit_enabled=0 res=1
[    0.942080] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages
[    0.942127] HugeTLB registered 8.00 MiB page size, pre-allocated 0 pages
[    0.942171] HugeTLB registered 256 MiB page size, pre-allocated 0 pages
[    0.942213] HugeTLB registered 2.00 GiB page size, pre-allocated 0 pages
[    0.954563] SUN4V: Reboot data supported (maj=1,min=0).
[    0.955003] ds.c:v1.0 (Jul 11, 2007)
[    0.955411] ds-0: ds_conn_reset() from send_events.isra.3
[    0.956852] clocksource: Switched to clocksource stick
[    1.136579] VFS: Disk quotas dquot_6.6.0
[    1.137098] VFS: Dquot-cache hash table entries: 1024 (order 0, 8192 bytes)
[    1.156618] NET: Registered protocol family 2
[    1.161709] tcp_listen_portaddr_hash hash table entries: 32768
(order: 8, 2359296 bytes)
[    1.164926] TCP established hash table entries: 524288 (order: 9,
4194304 bytes)
[    1.166999] TCP bind hash table entries: 65536 (order: 9, 4194304 bytes)
[    1.173136] TCP: Hash tables configured (established 524288 bind 65536)
[    1.179706] UDP hash table entries: 32768 (order: 9, 5242880 bytes)
[    1.186409] UDP-Lite hash table entries: 32768 (order: 9, 5242880 bytes)
[    1.199965] NET: Registered protocol family 1
[    1.200694] Unpacking initramfs...
[    1.431272] Freeing initrd memory: 7336K
[    1.473220] Kprobe smoke test: started
[    1.482012] Kprobe smoke test: passed successfully
[    1.483104] workingset: timestamp_bits=46 max_order=23 bucket_order=0
[    1.484411] zbud: loaded
[    1.636008] Block layer SCSI generic (bsg) driver version 0.4
loaded (major 252)
[    1.637688] io scheduler noop registered
[    1.637721] io scheduler deadline registered (default)
[    1.638388] io scheduler cfq registered
[    1.638420] io scheduler mq-deadline registered (default)
[    1.638458] io scheduler kyber registered
[    1.641791] f029b788: ttyS0 at I/O 0x0 (irq = 1, base_baud =
115200) is a SUN4V HCONS
[    1.647813] printk: console [ttyHV0] enabled
[    1.651247] sunvdc.c:v1.2 (November 24, 2014)
[    1.657878] sunvdc: Virtual CDROM vdiskd
[    1.657929] sunvdc: vdiskd: 403160 sectors (196 MB) protocol 1.2
[    1.659309]  vdiskd: vdiskd1 vdiskd2 vdiskd3 vdiskd4 vdiskd5 vdiskd6 vdiskd7
[    1.702561] sunvdc: Virtual Hard disk vdiskc
[    1.702600] sunvdc: vdiskc: 104857600 sectors (51200 MB) protocol 1.2
[    1.741930] sunvdc: Virtual Hard disk vdiskb
[    1.741969] sunvdc: vdiskb: 62914560 sectors (30720 MB) protocol 1.2
[    1.765637]  vdiskb: vdiskb1
[    1.805186] sunvdc: Virtual Hard disk vdiska
[    1.805223] sunvdc: vdiska: 31457280 sectors (15360 MB) protocol 1.2
[    1.805960]  vdiska: vdiska1 vdiska2 vdiska3 vdiska4
[    1.839927] sunvnet: sunvnet 2.0 (February 3, 2017)
[    1.843366] vnet_port vnet-port-0-0 eth0: Sun LDOM vnet 00:14:4f:f8:12:a3
[    1.843918] sunvnet: eth0: PORT ( remote-mac 00:14:4f:fa:f3:f0 switch-port )
[    1.845211] sunvnet: eth0: PORT ( remote-mac 00:14:4f:f8:e5:f3 )
[    1.846483] sunvnet: eth0: PORT ( remote-mac 00:14:4f:f9:b4:97 )
[    1.847807] sunvnet: eth0: PORT ( remote-mac 00:14:4f:f9:8b:83 )
[    1.849082] sunvnet: eth0: PORT ( remote-mac 00:14:4f:f8:fe:47 )
[    1.850070] mousedev: PS/2 mouse device common for all mice
[    1.851199] rtc-sun4v rtc-sun4v: rtc core: registered sun4v as rtc0
[    1.852305] device-mapper: uevent: version 1.0.3
[    1.853383] device-mapper: ioctl: 4.39.0-ioctl (2018-04-03)
initialised: dm-devel@xxxxxxxxxx
[    1.854915] NET: Registered protocol family 17
[    1.856124] registered taskstats version 1
[    1.859098] zswap: loaded using pool lzo/zbud
[    1.888560] Key type big_key registered
[    1.889406] rtc-sun4v rtc-sun4v: setting system clock to 2019-01-02
10:39:17 UTC (1546425557)
[    1.893904] This architecture does not have kernel memory protection.
[    1.893950] Run /init as init process
Loading, please wait...
starting version 240
[    2.736997] ------------[ cut here ]------------
[    2.737128] WARNING: CPU: 19 PID: 0 at block/blk-mq.c:1309
__blk_mq_run_hw_queue+0xe0/0x140
[    2.737208] Modules linked in:
[    2.737248] CPU: 19 PID: 0 Comm: swapper/19 Not tainted
4.20.0-rc1-00089-gfa182a1fa97d #812
[    2.737315] Call Trace:
[    2.737356]  [00000000004641c0] __warn+0xc0/0x100
[    2.737397]  [000000000046428c] warn_slowpath_null+0x2c/0x40
[    2.737445]  [00000000007c36c0] __blk_mq_run_hw_queue+0xe0/0x140
[    2.737500]  [00000000007c3784] __blk_mq_delay_run_hw_queue+0x64/0x1a0
[    2.737553]  [00000000007c5628] blk_mq_run_hw_queue+0xc8/0x100
[    2.737605]  [00000000007c69c0] blk_mq_start_hw_queues+0x40/0x60
[    2.737656]  [00000000008604fc] vdc_blk_queue_start+0x5c/0x80
[    2.737696]  [00000000008619fc] vdc_event+0x1fc/0x2c0
[    2.737737]  [0000000000446aac] send_events.isra.3+0x4c/0x60
[    2.737777]  [00000000004487d4] ldc_rx+0x234/0x260
[    2.737815]  [00000000004dd470] __handle_irq_event_percpu+0x170/0x380
[    2.737858]  [00000000004dd694] handle_irq_event_percpu+0x14/0x60
[    2.737899]  [00000000004dd718] handle_irq_event+0x38/0x80
[    2.737941]  [00000000004e17a4] handle_fasteoi_irq+0x124/0x220
[    2.737987]  [00000000004dca0c] generic_handle_irq+0x2c/0x40
[    2.738048]  [0000000000a11b40] handler_irq+0xc0/0x100
[    2.738094] irq event stamp: 2860
[    2.738136] hardirqs last  enabled at (2857): [<000000000042d644>]
arch_cpu_idle+0x44/0xc0
[    2.738207] hardirqs last disabled at (2858): [<00000000004271dc>]
sys_call_table+0x5f0/0x854
[    2.738279] softirqs last  enabled at (2860): [<000000000046b884>]
_local_bh_enable+0x44/0x60
[    2.738348] softirqs last disabled at (2859): [<000000000046bb5c>]
irq_enter+0x3c/0x80
[    2.738413] ---[ end trace 58887c4073a09c83 ]---
[    2.740036] crc32c_sparc64: Using sparc64 crc32c opcode optimized
CRC32C implementation
[    2.770351]
[    2.770377] ================================
[    2.770389] WARNING: inconsistent lock state
[    2.770404] 4.20.0-rc1-00089-gfa182a1fa97d #812 Tainted: G        W
[    2.770417] --------------------------------
[    2.770427] inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
[    2.770441] swapper/17/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
[    2.770454] (____ptrval____) (&(&dd->lock)->rlock){?.+.}, at:
dd_dispatch_request+0x1c/0x200
[    2.770488] {HARDIRQ-ON-W} state was registered at:
[    2.770507]   lock_acquire+0x198/0x1c0
[    2.770527]   _raw_spin_lock+0x30/0x60
[    2.770541]   dd_bio_merge+0x20/0x60
[    2.770565]   __blk_mq_sched_bio_merge+0x84/0x160
[    2.770581]   blk_mq_make_request+0xc0/0x7c0
[    2.770599]   generic_make_request+0x2e0/0x460
[    2.770613]   submit_bio+0x158/0x180
[    2.770629]   submit_bh_wbc+0x1cc/0x1e0
[    2.770643]   block_read_full_page+0x340/0x380
[    2.770658]   blkdev_readpage+0x14/0x40
[    2.770675]   do_read_cache_page+0xac/0x360
[    2.770689]   read_cache_page+0x1c/0x40
[    2.770704]   read_dev_sector+0x20/0xa0
[    2.770719]   read_lba.isra.0+0xb8/0x160
[    2.770733]   efi_partition+0xc8/0xac0
[    2.770745]   check_partition+0x124/0x240
[    2.770759]   rescan_partitions+0x90/0x3a0
[    2.770774]   __blkdev_get+0x1e8/0x500
[    2.770788]   blkdev_get+0x1c0/0x3c0
[    2.770800]   __device_add_disk+0x36c/0x520
[    2.770814]   device_add_disk+0x18/0x40
[    2.770830]   vdc_port_probe+0x60c/0x6c0
[    2.770851]   vio_device_probe+0xac/0xc0
[    2.770871]   really_probe+0x1e8/0x400
[    2.770885]   driver_probe_device+0xfc/0x140
[    2.770900]   __driver_attach+0xf8/0x140
[    2.770915]   bus_for_each_dev+0x40/0xa0
[    2.770928]   driver_attach+0x1c/0x40
[    2.770941]   bus_add_driver+0x154/0x280
[    2.770954]   driver_register+0xc4/0x120
[    2.770966]   __vio_register_driver+0x28/0x40
[    2.770981]   vdc_init+0x70/0xa4
[    2.770995]   do_one_initcall+0x150/0x340
[    2.771012]   kernel_init_freeable+0x440/0x4fc
[    2.771025]   kernel_init+0xc/0x120
[    2.771043]   ret_from_fork+0x1c/0x2c
[    2.771053]             (null)
[    2.771063] irq event stamp: 2634
[    2.771080] hardirqs last  enabled at (2631): [<000000000042d644>]
arch_cpu_idle+0x44/0xc0
[    2.771097] hardirqs last disabled at (2632): [<00000000004271dc>]
sys_call_table+0x5f0/0x854
[    2.771117] softirqs last  enabled at (2634): [<000000000046b884>]
_local_bh_enable+0x44/0x60
[    2.771134] softirqs last disabled at (2633): [<000000000046bb5c>]
irq_enter+0x3c/0x80
[    2.771148]
[    2.771148] other info that might help us debug this:
[    2.771162]  Possible unsafe locking scenario:
[    2.771162]
[    2.771174]        CPU0
[    2.771182]        ----
[    2.771190]   lock(&(&dd->lock)->rlock);
[    2.771202]   <Interrupt>
[    2.771209]     lock(&(&dd->lock)->rlock);
[    2.771222]
[    2.771222]  *** DEADLOCK ***
[    2.771222]
[    2.771240] 2 locks held by swapper/17/0:
[    2.771252]  #0: (____ptrval____) (&(&vio->lock)->rlock){-...}, at:
vdc_event+0xc/0x2c0
[    2.771279]  #1: (____ptrval____) (rcu_read_lock){....}, at:
hctx_lock+0x1c/0x100
[    2.771308]
[    2.771308] stack backtrace:
[    2.771329] CPU: 17 PID: 0 Comm: swapper/17 Tainted: G        W
    4.20.0-rc1-00089-gfa182a1fa97d #812
[    2.771353] Call Trace:
[    2.771368]  [00000000004d18ec] print_usage_bug+0x2d4/0x2e8
[    2.771387]  [00000000004cd168] mark_lock+0x4c8/0x880
[    2.771406]  [00000000004cec08] __lock_acquire+0x348/0x1fa0
[    2.771424]  [00000000004d12d8] lock_acquire+0x198/0x1c0
[    2.771444]  [0000000000a0f670] _raw_spin_lock+0x30/0x60
[    2.771463]  [00000000007e839c] dd_dispatch_request+0x1c/0x200
[    2.771484]  [00000000007cae68] blk_mq_do_dispatch_sched+0x68/0x100
[    2.771504]  [00000000007cb31c] blk_mq_sched_dispatch_requests+0x11c/0x180
[    2.771524]  [00000000007c36f8] __blk_mq_run_hw_queue+0x118/0x140
[    2.771545]  [00000000007c3784] __blk_mq_delay_run_hw_queue+0x64/0x1a0
[    2.771564]  [00000000007c5628] blk_mq_run_hw_queue+0xc8/0x100
[    2.771583]  [00000000007c69c0] blk_mq_start_hw_queues+0x40/0x60
[    2.771602]  [00000000008604fc] vdc_blk_queue_start+0x5c/0x80
[    2.771620]  [00000000008619fc] vdc_event+0x1fc/0x2c0
[    2.771640]  [0000000000446aac] send_events.isra.3+0x4c/0x60
[    2.771659]  [00000000004487d4] ldc_rx+0x234/0x260
[   28.756775] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[   28.756823] rcu:     23-...!: (0 ticks this GP)
idle=282/1/0x4000000000000000 softirq=29/29 fqs=1
[   28.756859] rcu:     (detected by 9, t=2602 jiffies, g=-1023, q=6280)
[   28.756915]   CPU[ 23]: TSTATE[0000004411001603]
TPC[00000000004d2f28] TNPC[00000000004d2f2c] TASK[(worker):273]
[   28.756963]              TPC[queued_spin_lock_slowpath+0x1e8/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[   28.757013] rcu: rcu_sched kthread starved for 2599 jiffies! g-1023
f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=17
[   28.757044] rcu: RCU grace-period kthread stack dump:
[   28.757063] rcu_sched       I    0    10      2 0x06000000
[   28.757086] Call Trace:
[   28.757104]  [0000000000a093bc] schedule+0x7c/0xc0
[   28.757124]  [0000000000a0ea98] schedule_timeout+0x478/0x4a0
[   28.757148]  [00000000004eec64] rcu_gp_kthread+0xe44/0x1a00
[   28.757172]  [000000000048d2d4] kthread+0x114/0x140
[   28.757194]  [00000000004060e4] ret_from_fork+0x1c/0x2c
[   28.757213]  [0000000000000000]           (null)
[   54.776775] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[   54.776824] rcu:     16-...0: (1 GPs behind)
idle=4ea/1/0x4000000000000000 softirq=32/33 fqs=696
[   54.776855] rcu:     17-...0: (1 GPs behind)
idle=456/1/0x4000000000000002 softirq=48/49 fqs=696
[   54.776886] rcu:     18-...0: (1 GPs behind)
idle=382/1/0x4000000000000000 softirq=35/36 fqs=696
[   54.776916] rcu:     21-...0: (1 GPs behind)
idle=396/1/0x4000000000000000 softirq=48/48 fqs=696
[   54.776946] rcu:     23-...0: (1 GPs behind)
idle=282/1/0x4000000000000000 softirq=29/29 fqs=696
[   54.776978] rcu:     (detected by 0, t=2602 jiffies, g=-1019, q=5511)
[   54.777034]   CPU[ 16]: TSTATE[0000004411001607]
TPC[00000000004d2f24] TNPC[00000000004d2f28] TASK[(worker):277]
[   54.777083]              TPC[queued_spin_lock_slowpath+0x1e4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[   54.777131]   CPU[ 17]: TSTATE[0000000080001600]
TPC[00000000004d2f68] TNPC[00000000004d2f6c] TASK[(worker):275]
[   54.777167]              TPC[queued_spin_lock_slowpath+0x228/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[   54.777215]   CPU[ 18]: TSTATE[0000000011001602]
TPC[00000000004d2dcc] TNPC[00000000004d2dd0] TASK[(worker):259]
[   54.777250]              TPC[queued_spin_lock_slowpath+0x8c/0x2e0]
O7[queued_spin_lock_slowpath+0x48/0x2e0]
I7[do_raw_spin_lock+0xe0/0x100] RPC[printk+0x28/0x38]
[   54.777303]   CPU[ 21]: TSTATE[0000004411001607]
TPC[00000000004d2f24] TNPC[00000000004d2f28] TASK[(worker):278]
[   54.777338]              TPC[queued_spin_lock_slowpath+0x1e4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[   54.777385]   CPU[ 23]: TSTATE[0000004411001603]
TPC[00000000004d2f34] TNPC[00000000004d2f38] TASK[(worker):273]
[   54.777420]              TPC[queued_spin_lock_slowpath+0x1f4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
Begin: Loading essential drivers ... [  123.216802] raid6: int64x1
gen()  2851 MB/s
[  123.386799] raid6: int64x1  xor()  1628 MB/s
[  123.556800] raid6: int64x2  gen()  2873 MB/s
[  123.726802] raid6: int64x2  xor()  1993 MB/s
[  123.896794] raid6: int64x4  gen()  3469 MB/s
[  124.066809] raid6: int64x4  xor()  1997 MB/s
[  124.236818] raid6: int64x8  gen()  2211 MB/s
[  124.406796] raid6: int64x8  xor()  1588 MB/s
[  124.406820] raid6: using algorithm int64x4 gen() 3469 MB/s
[  124.406842] raid6: .... xor() 1997 MB/s, rmw enabled
[  124.406861] raid6: using intx1 recovery algorithm
[  124.407581] async_tx: api initialized (async)
[  124.408008] xor: automatically using best checksumming function   Niagara
done.
Begin: Running /scripts/init-premount ... done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Running /scripts/local-premount ... done.
[  132.826776] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[  132.826824] rcu:     16-...0: (1 GPs behind)
idle=4ea/1/0x4000000000000000 softirq=32/33 fqs=2955
[  132.826856] rcu:     17-...0: (1 GPs behind)
idle=456/1/0x4000000000000002 softirq=48/49 fqs=2955
[  132.826886] rcu:     18-...0: (1 GPs behind)
idle=382/1/0x4000000000000000 softirq=35/36 fqs=2955
[  132.826916] rcu:     21-...0: (1 GPs behind)
idle=396/1/0x4000000000000000 softirq=48/48 fqs=2955
[  132.826946] rcu:     23-...0: (1 GPs behind)
idle=282/1/0x4000000000000000 softirq=29/29 fqs=2955
[  132.826979] rcu:     (detected by 10, t=10407 jiffies, g=-1019, q=6474)
[  132.827034]   CPU[ 16]: TSTATE[0000004411001607]
TPC[00000000004d2f28] TNPC[00000000004d2f2c] TASK[(worker):277]
[  132.827082]              TPC[queued_spin_lock_slowpath+0x1e8/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  132.827129]   CPU[ 17]: TSTATE[0000000080001600]
TPC[00000000004d2f74] TNPC[00000000004d2f78] TASK[(worker):275]
[  132.827165]              TPC[queued_spin_lock_slowpath+0x234/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  132.827211]   CPU[ 18]: TSTATE[0000000011001602]
TPC[00000000004d2dcc] TNPC[00000000004d2dd0] TASK[(worker):259]
[  132.827246]              TPC[queued_spin_lock_slowpath+0x8c/0x2e0]
O7[queued_spin_lock_slowpath+0x48/0x2e0]
I7[do_raw_spin_lock+0xe0/0x100] RPC[printk+0x28/0x38]
[  132.827297]   CPU[ 21]: TSTATE[0000004411001607]
TPC[00000000004d2f28] TNPC[00000000004d2f2c] TASK[(worker):278]
[  132.827331]              TPC[queued_spin_lock_slowpath+0x1e8/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  132.827379]   CPU[ 23]: TSTATE[0000004411001603]
TPC[00000000004d2f28] TNPC[00000000004d2f2c] TASK[(worker):273]
[  132.827413]              TPC[queued_spin_lock_slowpath+0x1e8/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
Begin: Will now check root file system ... fsck from util-linux 2.32.1
[/sbin/fsck.ext4 (1) -- /dev/vdiska2] fsck.ext4 -a -C0 /dev/vdiska2
/dev/vdiska2: clean, 189379/912128 files, 3325357/3662820 blocks
done.
[  134.608390] EXT4-fs (vdiska2): mounted filesystem with ordered data
mode. Opts: (null)
done.
[  134.609911] random: fast init done
Begin: Running /scripts/local-bottom ... done.
Begin: Running /scripts/init-bottom ... [  156.606777] watchdog: BUG:
soft lockup - CPU#1 stuck for 22s! [(worker):283]
[  156.606824] Modules linked in: ext4 crc16 mbcache jbd2 raid10
raid456 libcrc32c crc32c_generic async_raid6_recov async_memcpy
async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear
md_mod crc32c_sparc64
[  156.606906] irq event stamp: 0
[  156.606922] hardirqs last  enabled at (0): [<0000000000000000>]
      (null)
[  156.606955] hardirqs last disabled at (0): [<0000000000461774>]
copy_process.isra.3+0x474/0x1a60
[  156.606985] softirqs last  enabled at (0): [<0000000000461774>]
copy_process.isra.3+0x474/0x1a60
[  156.607014] softirqs last disabled at (0): [<0000000000000000>]
      (null)
[  156.607042] CPU: 1 PID: 283 Comm: (worker) Tainted: G        W
   4.20.0-rc1-00089-gfa182a1fa97d #812
[  156.607073] TSTATE: 0000000011001604 TPC: 00000000005140e8 TNPC:
00000000005140ec Y: 00000000    Tainted: G        W
[  156.607111] TPC: <smp_call_function_single+0x108/0x180>
[  156.607130] g0: 000000000000000e g1: 0000000000000003 g2:
000000000000000e g3: 0000000000000001
[  156.607158] g4: fff800249aa316e0 g5: fff80024aa2c8000 g6:
fff800249b990000 g7: 0000000000000100
[  156.607185] o0: 0000000000000000 o1: fff800249b9934e0 o2:
000000000043ffe0 o3: fff800249b993688
[  156.607213] o4: 00000000014db000 o5: 0000000000000000 sp:
fff800249b992c31 ret_pc: 000000000051410c
[  156.607242] RPC: <smp_call_function_single+0x12c/0x180>
[  156.607261] l0: 0000000000ca4000 l1: ffffffffffffffe0 l2:
000000000000000e l3: 000000000044fad4
[  156.607289] l4: 0000000000000000 l5: 0000000000000000 l6:
0000000000000000 l7: fff80001003c0000
[  156.607316] i0: 0000000000000012 i1: 000000000043ffe0 i2:
fff800249b993688 i3: 0000000000000001
[  156.607344] i4: 0000000000000001 i5: fff800249b9934e0 i6:
fff800249b992d21 i7: 00000000005145b8
[  156.607372] I7: <smp_call_function_many+0x118/0x320>
[  156.607390] Call Trace:
[  156.607404]  [00000000005145b8] smp_call_function_many+0x118/0x320
[  156.607427]  [0000000000441198] smp_flush_tlb_pending+0x98/0xe0
[  156.607449]  [000000000044f2c0] flush_tlb_pending+0x80/0xa0
[  156.607470]  [000000000044f624] arch_leave_lazy_mmu_mode+0x24/0x40
[  156.607499]  [00000000006211f4] unmap_page_range+0x754/0x900
[  156.607520]  [0000000000621444] unmap_single_vma+0xa4/0xc0
[  156.607540]  [0000000000621530] unmap_vmas+0x30/0x60
[  156.607560]  [000000000062ab7c] exit_mmap+0xdc/0x160
[  156.607579]  [0000000000460ff8] mmput+0x78/0x120
[  156.607598]  [000000000046a0d0] do_exit+0x3f0/0xbe0
[  156.607617]  [000000000046a9e8] do_group_exit+0xa8/0xc0
[  156.607637]  [000000000046aa18] sys_exit_group+0x18/0x40
[  156.607659]  [0000000000406294] linux_sparc_syscall+0x34/0x44
done.
[  181.386785] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 45s!
[  181.386955] Showing busy workqueues and worker pools:
[  181.387020] workqueue events: flags=0x0
[  181.387354]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  181.387383]     pending: cache_reap
[  181.387755] workqueue mm_percpu_wq: flags=0x8
[  181.388073]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  181.388099]     pending: vmstat_update
[  181.388631] workqueue kblockd: flags=0x18
[  181.389095]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  181.389123]     in-flight: 346:blk_mq_run_work_fn
[  181.390238] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=15s
workers=2 idle: 63
[  210.876775] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[  210.876824] rcu:     16-...0: (1 GPs behind)
idle=4ea/1/0x4000000000000000 softirq=32/33 fqs=4979
[  210.876857] rcu:     17-...0: (1 GPs behind)
idle=456/1/0x4000000000000002 softirq=48/49 fqs=4979
[  210.876888] rcu:     18-...0: (1 GPs behind)
idle=382/1/0x4000000000000000 softirq=35/36 fqs=4979
[  210.876919] rcu:     21-...0: (1 GPs behind)
idle=396/1/0x4000000000000000 softirq=48/48 fqs=4979
[  210.876949] rcu:     23-...0: (1 GPs behind)
idle=282/1/0x4000000000000000 softirq=29/29 fqs=4979
[  210.876983] rcu:     (detected by 11, t=18212 jiffies, g=-1019, q=8345)
[  210.877044]   CPU[ 16]: TSTATE[0000004411001607]
TPC[00000000004d2f28] TNPC[00000000004d2f2c] TASK[(worker):277]
[  210.877096]              TPC[queued_spin_lock_slowpath+0x1e8/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  210.877145]   CPU[ 17]: TSTATE[0000000080001600]
TPC[00000000004d2f68] TNPC[00000000004d2f6c] TASK[(worker):275]
[  210.877181]              TPC[queued_spin_lock_slowpath+0x228/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  210.877229]   CPU[ 18]: TSTATE[0000000011001602]
TPC[00000000004d2dd0] TNPC[00000000004d2dd4] TASK[(worker):259]
[  210.877264]              TPC[queued_spin_lock_slowpath+0x90/0x2e0]
O7[queued_spin_lock_slowpath+0x48/0x2e0]
I7[do_raw_spin_lock+0xe0/0x100] RPC[printk+0x28/0x38]
[  210.877317]   CPU[ 21]: TSTATE[0000004411001607]
TPC[00000000004d2f24] TNPC[00000000004d2f28] TASK[(worker):278]
[  210.877353]              TPC[queued_spin_lock_slowpath+0x1e4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  210.877402]   CPU[ 23]: TSTATE[0000004411001603]
TPC[00000000004d2f24] TNPC[00000000004d2f28] TASK[(worker):273]
[  210.877438]              TPC[queued_spin_lock_slowpath+0x1e4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  211.466782] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 76s!
[  211.466945] Showing busy workqueues and worker pools:
[  211.467011] workqueue events: flags=0x0
[  211.467363]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  211.467390]     pending: cache_reap
[  211.467765] workqueue mm_percpu_wq: flags=0x8
[  211.468083]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  211.468109]     pending: vmstat_update
[  211.468666] workqueue kblockd: flags=0x18
[  211.469149]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  211.469177]     in-flight: 346:blk_mq_run_work_fn
[  211.470339] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=45s
workers=2 idle: 63
[  241.536782] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 106s!
[  241.536941] Showing busy workqueues and worker pools:
[  241.537005] workqueue events: flags=0x0
[  241.537355]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  241.537382]     pending: cache_reap
[  241.537757] workqueue mm_percpu_wq: flags=0x8
[  241.538075]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  241.538101]     pending: vmstat_update
[  241.538659] workqueue kblockd: flags=0x18
[  241.539144]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  241.539172]     in-flight: 346:blk_mq_run_work_fn
[  241.540333] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=75s
workers=2 idle: 63
[  271.616790] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 136s!
[  271.616954] Showing busy workqueues and worker pools:
[  271.617019] workqueue events: flags=0x0
[  271.617374]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  271.617402]     pending: cache_reap
[  271.617775] workqueue mm_percpu_wq: flags=0x8
[  271.618094]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  271.618120]     pending: vmstat_update
[  271.618675] workqueue kblockd: flags=0x18
[  271.619157]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  271.619185]     in-flight: 346:blk_mq_run_work_fn
[  271.620347] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=105s
workers=2 idle: 63
[  288.926774] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[  288.926825] rcu:     16-...0: (1 GPs behind)
idle=4ea/1/0x4000000000000000 softirq=32/33 fqs=7017
[  288.926857] rcu:     17-...0: (1 GPs behind)
idle=456/1/0x4000000000000002 softirq=48/49 fqs=7017
[  288.926888] rcu:     18-...0: (1 GPs behind)
idle=382/1/0x4000000000000000 softirq=35/36 fqs=7017
[  288.926918] rcu:     21-...0: (1 GPs behind)
idle=396/1/0x4000000000000000 softirq=48/48 fqs=7017
[  288.926947] rcu:     23-...0: (1 GPs behind)
idle=282/1/0x4000000000000000 softirq=29/29 fqs=7017
[  288.926980] rcu:     (detected by 1, t=26017 jiffies, g=-1019, q=8351)
[  288.927036]   CPU[ 16]: TSTATE[0000004411001607]
TPC[00000000004d2f28] TNPC[00000000004d2f2c] TASK[(worker):277]
[  288.927084]              TPC[queued_spin_lock_slowpath+0x1e8/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  288.927131]   CPU[ 17]: TSTATE[0000000080001600]
TPC[00000000004d2f6c] TNPC[00000000004d2f70] TASK[(worker):275]
[  288.927167]              TPC[queued_spin_lock_slowpath+0x22c/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  288.927214]   CPU[ 18]: TSTATE[0000000011001602]
TPC[00000000004d2dd0] TNPC[00000000004d2dd4] TASK[(worker):259]
[  288.927250]              TPC[queued_spin_lock_slowpath+0x90/0x2e0]
O7[queued_spin_lock_slowpath+0x48/0x2e0]
I7[do_raw_spin_lock+0xe0/0x100] RPC[printk+0x28/0x38]
[  288.927302]   CPU[ 21]: TSTATE[0000004411001607]
TPC[00000000004d2f28] TNPC[00000000004d2f2c] TASK[(worker):278]
[  288.927337]              TPC[queued_spin_lock_slowpath+0x1e8/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  288.927385]   CPU[ 23]: TSTATE[0000004411001603]
TPC[00000000004d2f24] TNPC[00000000004d2f28] TASK[(worker):273]
[  288.927420]              TPC[queued_spin_lock_slowpath+0x1e4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  316.606777] watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [(worker):283]
[  316.606823] Modules linked in: ext4 crc16 mbcache jbd2 raid10
raid456 libcrc32c crc32c_generic async_raid6_recov async_memcpy
async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear
md_mod crc32c_sparc64
[  316.606910] irq event stamp: 0
[  316.606926] hardirqs last  enabled at (0): [<0000000000000000>]
      (null)
[  316.606959] hardirqs last disabled at (0): [<0000000000461774>]
copy_process.isra.3+0x474/0x1a60
[  316.606988] softirqs last  enabled at (0): [<0000000000461774>]
copy_process.isra.3+0x474/0x1a60
[  316.607016] softirqs last disabled at (0): [<0000000000000000>]
      (null)
[  316.607044] CPU: 1 PID: 283 Comm: (worker) Tainted: G        W    L
   4.20.0-rc1-00089-gfa182a1fa97d #812
[  316.607075] TSTATE: 0000000011001604 TPC: 00000000005140e4 TNPC:
00000000005140e8 Y: 00000000    Tainted: G        W    L
[  316.607112] TPC: <smp_call_function_single+0x104/0x180>
[  316.607131] g0: 000000000000000e g1: 0000000000000003 g2:
000000000000000e g3: 0000000000000001
[  316.607159] g4: fff800249aa316e0 g5: fff80024aa2c8000 g6:
fff800249b990000 g7: 0000000000000100
[  316.607187] o0: 0000000000000000 o1: fff800249b9934e0 o2:
000000000043ffe0 o3: fff800249b993688
[  316.607214] o4: 00000000014db000 o5: 0000000000000000 sp:
fff800249b992c31 ret_pc: 000000000051410c
[  316.607243] RPC: <smp_call_function_single+0x12c/0x180>
[  316.607263] l0: 0000000000ca4000 l1: ffffffffffffffe0 l2:
000000000000000e l3: 000000000044fad4
[  316.607290] l4: 0000000000000000 l5: 0000000000000000 l6:
0000000000000000 l7: fff80001003c0000
[  316.607318] i0: 0000000000000012 i1: 000000000043ffe0 i2:
fff800249b993688 i3: 0000000000000001
[  316.607345] i4: 0000000000000001 i5: fff800249b9934e0 i6:
fff800249b992d21 i7: 00000000005145b8
[  316.607374] I7: <smp_call_function_many+0x118/0x320>
[  316.607392] Call Trace:
[  316.607405]  [00000000005145b8] smp_call_function_many+0x118/0x320
[  316.607429]  [0000000000441198] smp_flush_tlb_pending+0x98/0xe0
[  316.607450]  [000000000044f2c0] flush_tlb_pending+0x80/0xa0
[  316.607471]  [000000000044f624] arch_leave_lazy_mmu_mode+0x24/0x40
[  316.607500]  [00000000006211f4] unmap_page_range+0x754/0x900
[  316.607521]  [0000000000621444] unmap_single_vma+0xa4/0xc0
[  316.607541]  [0000000000621530] unmap_vmas+0x30/0x60
[  316.607561]  [000000000062ab7c] exit_mmap+0xdc/0x160
[  316.607580]  [0000000000460ff8] mmput+0x78/0x120
[  316.607600]  [000000000046a0d0] do_exit+0x3f0/0xbe0
[  316.607618]  [000000000046a9e8] do_group_exit+0xa8/0xc0
[  316.607638]  [000000000046aa18] sys_exit_group+0x18/0x40
[  316.607660]  [0000000000406294] linux_sparc_syscall+0x34/0x44
[  331.776787] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 196s!
[  331.776945] Showing busy workqueues and worker pools:
[  331.777009] workqueue events: flags=0x0
[  331.777361]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  331.777389]     pending: cache_reap
[  331.777764] workqueue mm_percpu_wq: flags=0x8
[  331.778082]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  331.778108]     pending: vmstat_update
[  331.778668] workqueue kblockd: flags=0x18
[  331.779146]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  331.779174]     in-flight: 346:blk_mq_run_work_fn
[  331.780335] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=166s
workers=2 idle: 63
[  361.866781] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 226s!
[  361.866941] Showing busy workqueues and worker pools:
[  361.867005] workqueue events: flags=0x0
[  361.867357]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  361.867386]     pending: cache_reap
[  361.867761] workqueue mm_percpu_wq: flags=0x8
[  361.868079]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  361.868104]     pending: vmstat_update
[  361.868662] workqueue kblockd: flags=0x18
[  361.869151]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  361.869179]     in-flight: 346:blk_mq_run_work_fn
[  361.870338] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=196s
workers=2 idle: 63
[  366.976775] rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
[  366.976826] rcu:     16-...0: (1 GPs behind)
idle=4ea/1/0x4000000000000000 softirq=32/33 fqs=9072
[  366.976858] rcu:     17-...0: (1 GPs behind)
idle=456/1/0x4000000000000002 softirq=48/49 fqs=9072
[  366.976889] rcu:     18-...0: (1 GPs behind)
idle=382/1/0x4000000000000000 softirq=35/36 fqs=9072
[  366.976919] rcu:     21-...0: (1 GPs behind)
idle=396/1/0x4000000000000000 softirq=48/48 fqs=9072
[  366.976950] rcu:     23-...0: (1 GPs behind)
idle=282/1/0x4000000000000000 softirq=29/29 fqs=9072
[  366.976983] rcu:     (detected by 6, t=33822 jiffies, g=-1019, q=8375)
[  366.977050]   CPU[ 16]: TSTATE[0000004411001607]
TPC[00000000004d2f24] TNPC[00000000004d2f28] TASK[(worker):277]
[  366.977103]              TPC[queued_spin_lock_slowpath+0x1e4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  366.977152]   CPU[ 17]: TSTATE[0000000080001600]
TPC[00000000004d2f68] TNPC[00000000004d2f6c] TASK[(worker):275]
[  366.977188]              TPC[queued_spin_lock_slowpath+0x228/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  366.977236]   CPU[ 18]: TSTATE[0000000011001602]
TPC[00000000004d2dcc] TNPC[00000000004d2dd0] TASK[(worker):259]
[  366.977272]              TPC[queued_spin_lock_slowpath+0x8c/0x2e0]
O7[queued_spin_lock_slowpath+0x48/0x2e0]
I7[do_raw_spin_lock+0xe0/0x100] RPC[printk+0x28/0x38]
[  366.977326]   CPU[ 21]: TSTATE[0000004411001607]
TPC[00000000004d2f30] TNPC[00000000004d2f34] TASK[(worker):278]
[  366.977362]              TPC[queued_spin_lock_slowpath+0x1f0/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  366.977411]   CPU[ 23]: TSTATE[0000004411001603]
TPC[00000000004d2f24] TNPC[00000000004d2f28] TASK[(worker):273]
[  366.977446]              TPC[queued_spin_lock_slowpath+0x1e4/0x2e0]
O7[0xfff800249f6ea000] I7[do_raw_spin_lock+0xe0/0x100]
RPC[printk+0x28/0x38]
[  391.946784] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 256s!
[  391.946946] Showing busy workqueues and worker pools:
[  391.947011] workqueue events: flags=0x0
[  391.947365]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  391.947393]     pending: cache_reap
[  391.947768] workqueue mm_percpu_wq: flags=0x8
[  391.948086]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  391.948111]     pending: vmstat_update
[  391.948669] workqueue kblockd: flags=0x18
[  391.949152]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  391.949180]     in-flight: 346:blk_mq_run_work_fn
[  391.950340] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=226s
workers=2 idle: 63
[  422.016789] BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0
nice=0 stuck for 286s!
[  422.016950] Showing busy workqueues and worker pools:
[  422.017015] workqueue events: flags=0x0
[  422.017371]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  422.017398]     pending: cache_reap
[  422.017771] workqueue mm_percpu_wq: flags=0x8
[  422.018089]   pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256
[  422.018114]     pending: vmstat_update
[  422.018672] workqueue kblockd: flags=0x18
[  422.019155]   pwq 21: cpus=10 node=0 flags=0x0 nice=-20 active=1/256
[  422.019183]     in-flight: 346:blk_mq_run_work_fn
[  422.020344] pool 21: cpus=10 node=0 flags=0x0 nice=-20 hung=256s
workers=2 idle: 63





bisected kernel to the following commit:


mator@ttip:~$ cd linux-2.6
mator@ttip:~/linux-2.6$ git desc
v4.20-rc1-88-gea2c18e1044e

mator@ttip:~/linux-2.6$ git bisect good
fa182a1fa97dff56cda742f22d17d666420cd27f is the first bad commit
commit fa182a1fa97dff56cda742f22d17d666420cd27f
Author: Jens Axboe <axboe@xxxxxxxxx>
Date:   Mon Oct 15 08:54:23 2018 -0600

    sunvdc: convert to blk-mq

    Convert from the old request_fn style driver to blk-mq.

    Cc: David Miller <davem@xxxxxxxxxxxxx>
    Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>
    Tested-by: Ming Lei <ming.lei@xxxxxxxxxx>
    Reviewed-by: Omar Sandoval <osandov@xxxxxx>
    Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>

:040000 040000 2860baedf9e55349500dbc7ae738562f1e2ee05b
dfe5d1704ab9598a654aa4e4700487c33bd43039 M      drivers

mator@ttip:~/linux-2.6$ git bisect log
git bisect start
# good: [00c569b567c7f1f0da6162868fd02a9f29411805] Merge tag
'locks-v4.21-1' of
git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux
git bisect good 00c569b567c7f1f0da6162868fd02a9f29411805
# bad: [903b77c631673eeec9e9114e9524171cdf9a2646] Merge tag
'linux-kselftest-4.21-rc1' of
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
git bisect bad 903b77c631673eeec9e9114e9524171cdf9a2646
# bad: [1984f65c2fbc0d2b557d6e89ece9b39267e215c6] Merge tag
'vfio-v4.21-rc1' of git://github.com/awilliam/linux-vfio
git bisect bad 1984f65c2fbc0d2b557d6e89ece9b39267e215c6
# bad: [938edb8a31b976c9a92eb0cd4ff481e93f76c1f1] Merge tag
'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect bad 938edb8a31b976c9a92eb0cd4ff481e93f76c1f1
# bad: [00203ba40d40d7f33857416adfb18adaf0e40123] kyber: use sbitmap
add_wait_queue/list_del wait helpers
git bisect bad 00203ba40d40d7f33857416adfb18adaf0e40123
# bad: [c6d962aebaf8ec5d867aac09ee33e3f528c2539d] nvme-pci: only allow
polling with separate poll queues
git bisect bad c6d962aebaf8ec5d867aac09ee33e3f528c2539d
# bad: [511c49fe1804671800947b69281e07719fad25e2] fnic: fix
fnic_scsi_host_{start,end}_tag
git bisect bad 511c49fe1804671800947b69281e07719fad25e2
# bad: [3110fc79606fb6003949246c6fb325dd43445273] blk-mq: improve plug
list sorting
git bisect bad 3110fc79606fb6003949246c6fb325dd43445273
# bad: [a1ce35fa49852db60fc6e268038530be533c5b15] block: remove dead
elevator code
git bisect bad a1ce35fa49852db60fc6e268038530be533c5b15
# bad: [c6f2882691e8fd128083abdcc3c5aa5b410c2367] block: remove q->lld_busy_fn()
git bisect bad c6f2882691e8fd128083abdcc3c5aa5b410c2367
# bad: [600335205b8d162891b5ef2e32343f5b8020efd8] ide: convert to blk-mq
git bisect bad 600335205b8d162891b5ef2e32343f5b8020efd8
# bad: [fa182a1fa97dff56cda742f22d17d666420cd27f] sunvdc: convert to blk-mq
git bisect bad fa182a1fa97dff56cda742f22d17d666420cd27f
# good: [ea2c18e1044e9ed8f780c965c50432060ab0e355] null_blk: Add
conventional zone configuration for zoned support
git bisect good ea2c18e1044e9ed8f780c965c50432060ab0e355
# first bad commit: [fa182a1fa97dff56cda742f22d17d666420cd27f] sunvdc:
convert to blk-mq
mator@ttip:~/linux-2.6$




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