INFO: task khugepaged:1086 blocked for more than 143 seconds.
Not tainted 5.4.0-rc5-next-20191030 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
khugepaged D27840 1086 2 0x80004000
Call Trace:
context_switch kernel/sched/core.c:3385 [inline]
__schedule+0x94a/0x1e70 kernel/sched/core.c:4070
schedule+0xdc/0x2b0 kernel/sched/core.c:4144
io_schedule+0x1c/0x70 kernel/sched/core.c:5788
wait_on_page_bit_common mm/filemap.c:1175 [inline]
__lock_page+0x422/0xab0 mm/filemap.c:1383
lock_page include/linux/pagemap.h:480 [inline]
mpage_prepare_extent_to_map+0xb3f/0xf90 fs/ext4/inode.c:2668
ext4_writepages+0xb6a/0x2e70 fs/ext4/inode.c:2866
? 0xffffffff81000000
do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
__filemap_fdatawrite_range+0x2bc/0x3b0 mm/filemap.c:421
__filemap_fdatawrite mm/filemap.c:429 [inline]
filemap_flush+0x24/0x30 mm/filemap.c:456
collapse_file+0x36b1/0x41a0 mm/khugepaged.c:1652
khugepaged_scan_file mm/khugepaged.c:1890 [inline]
khugepaged_scan_mm_slot mm/khugepaged.c:1988 [inline]
khugepaged_do_scan mm/khugepaged.c:2072 [inline]
khugepaged+0x2da9/0x4360 mm/khugepaged.c:2117
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Showing all locks held in the system:
4 locks held by kworker/u4:5/467:
#0: ffff8880a837b528 ((wq_completion)writeback){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880a837b528 ((wq_completion)writeback){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880a837b528 ((wq_completion)writeback){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880a837b528 ((wq_completion)writeback){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880a837b528 ((wq_completion)writeback){+.+.}, at: set_work_data kernel/workqueue.c:614 [inline]
#0: ffff8880a837b528 ((wq_completion)writeback){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:641 [inline]
#0: ffff8880a837b528 ((wq_completion)writeback){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2234
#1: ffff8880a8427dc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2238
#2: ffff8882163be0d8 (&type->s_umount_key#32){++++}, at: trylock_super+0x22/0x110 fs/super.c:418
#3: ffff8882163c0990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
1 lock held by khungtaskd/1079:
#0: ffffffff88faba40 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 kernel/locking/lockdep.c:5336
1 lock held by khugepaged/1086:
#0: ffff8882163c0990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
1 lock held by rsyslogd/8726:
#0: ffff888099d85420 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
2 locks held by getty/8816:
#0: ffff8880a16b5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f4b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/8817:
#0: ffff8880a60ce090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f632e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/8818:
#0: ffff88808f94e090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/8819:
#0: ffff888098474090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f5f2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/8820:
#0: ffff88809aee5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f5b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/8821:
#0: ffff8880a92b1090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f572e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/8822:
#0: ffff8880a4b20090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f312e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
1 lock held by syz-execprog/8842:
#0: ffff8880a336f3a8 (&ei->i_mmap_sem){++++}, at: ext4_filemap_fault+0x7e/0xb2 fs/ext4/inode.c:6291
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1079 Comm: khungtaskd Not tainted 5.4.0-rc5-next-20191030 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:269 [inline]
watchdog+0xc8f/0x1350 kernel/hung_task.c:353
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc5-next-20191030 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:update_sd_lb_stats kernel/sched/fair.c:8392 [inline]
RIP: 0010:find_busiest_group+0x2a2/0x31b0 kernel/sched/fair.c:8619
Code: ff 0f b6 00 38 85 fb fd ff ff 7c 08 84 c0 0f 85 06 29 00 00 48 8b 85 e8 fd ff ff 41 8b 77 14 42 80 3c 20 00 0f 85 01 29 00 00 <49> 8b 3f 49 8d 9e 58 ff ff ff e8 2f f4 ff ff 31 f6 ba 48 00 00 00
RSP: 0018:ffff8880ae909880 EFLAGS: 00000246
RAX: 1ffff11015d21386 RBX: 0000000000000001 RCX: ffffffff8153d4cd
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880a981c420
RBP: ffff8880ae909b20 R08: 1ffff11015303884 R09: ffffed1015303885
R10: ffffed1015303884 R11: ffff8880a981c427 R12: dffffc0000000000
R13: ffff8880a981c420 R14: ffff8880ae909af8 R15: ffff8880ae909c30
FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c420000240 CR3: 0000000099b28000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
load_balance+0x389/0x2a90 kernel/sched/fair.c:8987
rebalance_domains+0x66a/0xba0 kernel/sched/fair.c:9413
_nohz_idle_balance+0x336/0x3f0 kernel/sched/fair.c:9826
nohz_idle_balance kernel/sched/fair.c:9872 [inline]
run_rebalance_domains+0x1c6/0x2d0 kernel/sched/fair.c:10056
__do_softirq+0x262/0x98c kernel/softirq.c:292
invoke_softirq kernel/softirq.c:373 [inline]
irq_exit+0x19b/0x1e0 kernel/softirq.c:413
scheduler_ipi+0x38c/0x610 kernel/sched/core.c:2348
smp_reschedule_interrupt+0x78/0x4c0 arch/x86/kernel/smp.c:244
reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:853
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
Code: 88 6e 59 fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 44 8b 52 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 34 8b 52 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be 53 0b fa e8 f9
RSP: 0018:ffff8880a98cfd68 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02
RAX: 1ffffffff11e643f RBX: ffff8880a98ba340 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98babdc
RBP: ffff8880a98cfd98 R08: ffff8880a98ba340 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: ffffffff89c80640 R14: 0000000000000000 R15: 0000000000000001
arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:571
default_idle_call+0x84/0xb0 kernel/sched/idle.c:94
cpuidle_idle_call kernel/sched/idle.c:154 [inline]
do_idle+0x3b7/0x6e0 kernel/sched/idle.c:263
cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:355
start_secondary+0x2f4/0x410 arch/x86/kernel/smpboot.c:264
secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242