watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [kworker/u4:6:10540] Modules linked in: irq event stamp: 3008000 hardirqs last enabled at (3007999): [] restore_regs_and_return_to_kernel+0x0/0x2b hardirqs last disabled at (3008000): [] interrupt_entry+0xb5/0xf0 arch/x86/entry/entry_64.S:625 softirqs last enabled at (2765168): [] __do_softirq+0x778/0xaf5 kernel/softirq.c:310 softirqs last disabled at (2765123): [] invoke_softirq kernel/softirq.c:364 [inline] softirqs last disabled at (2765123): [] irq_exit+0x1d1/0x200 kernel/softirq.c:404 CPU: 0 PID: 10540 Comm: kworker/u4:6 Not tainted 4.17.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-8:0) RIP: 0010:rep_nop arch/x86/include/asm/processor.h:658 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/processor.h:663 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x3e0/0x5b0 kernel/smp.c:302 Code: e8 03 4c 01 e8 c6 00 f8 48 89 44 24 28 e8 18 17 0c 00 45 85 e4 74 6a 48 8b 44 24 28 48 83 c3 18 49 89 c4 e8 f2 15 0c 00 f3 90 <48> 89 d8 41 c6 04 24 04 48 c1 e8 03 42 0f b6 04 28 84 c0 74 08 3c RSP: 0018:ffff8801c6a3d160 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff880193b62140 RBX: ffff8801c6a3d258 RCX: ffffffff816e7912 RDX: 0000000000000000 RSI: ffffffff816e78be RDI: 0000000000000005 RBP: ffff8801c6a3d2b8 R08: ffff880193b62140 R09: ffffed003b5e5b30 R10: ffffed003b5e5b30 R11: ffff8801daf2d987 R12: ffffed0038d47a40 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000008462798 CR3: 0000000008e6a000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many+0x870/0xa20 kernel/smp.c:434 native_flush_tlb_others+0xf7/0x690 arch/x86/mm/tlb.c:595 flush_tlb_others arch/x86/include/asm/paravirt.h:309 [inline] flush_tlb_mm_range+0x31a/0x4b0 arch/x86/mm/tlb.c:644 flush_tlb_page arch/x86/include/asm/tlbflush.h:526 [inline] ptep_clear_flush+0x1f5/0x250 mm/pgtable-generic.c:87 page_mkclean_one+0x3d4/0x710 mm/rmap.c:914 rmap_walk_file+0x6a9/0xe80 mm/rmap.c:1844 rmap_walk+0x23e/0x350 mm/rmap.c:1862 page_mkclean+0x2d8/0x3c0 mm/rmap.c:983 clear_page_dirty_for_io+0x424/0x1200 mm/page-writeback.c:2684 mpage_submit_page+0x8d/0x270 fs/ext4/inode.c:2190 mpage_process_page_bufs+0x50c/0x600 fs/ext4/inode.c:2320 mpage_prepare_extent_to_map+0x8fb/0x1100 fs/ext4/inode.c:2682 ext4_writepages+0x13ff/0x4030 fs/ext4/inode.c:2809 do_writepages+0x9a/0x1a0 mm/page-writeback.c:2341 __writeback_single_inode+0x1e4/0x15c0 fs/fs-writeback.c:1323 writeback_sb_inodes+0x6f0/0x11a0 fs/fs-writeback.c:1587 __writeback_inodes_wb+0x1b0/0x320 fs/fs-writeback.c:1656 wb_writeback+0x9e4/0xf50 fs/fs-writeback.c:1765 wb_check_start_all fs/fs-writeback.c:1889 [inline] wb_do_writeback fs/fs-writeback.c:1915 [inline] wb_workfn+0xe80/0x1740 fs/fs-writeback.c:1949 process_one_work+0xc64/0x1b70 kernel/workqueue.c:2153 worker_thread+0x181/0x13a0 kernel/workqueue.c:2296 kthread+0x345/0x410 kernel/kthread.c:240 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.17.0+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:validate_chain kernel/locking/lockdep.c:2391 [inline] RIP: 0010:__lock_acquire+0xa21/0x5140 kernel/locking/lockdep.c:3435 Code: ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 21 32 00 00 41 8b 42 20 25 00 80 04 00 3d 00 00 04 00 0f 84 be 03 00 00 <48> c7 c2 20 55 2a 89 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f RSP: 0018:ffff8801d9af7670 EFLAGS: 00000046 RAX: 1ffffffff13e3c5f RBX: ffffffff89f1e2e8 RCX: ffff8801d9af77f0 RDX: 1ffff1003b35eefe RSI: ffff8801d9ae8bb8 RDI: ffffffff89f1e2f8 RBP: ffff8801d9af79f8 R08: 0000000000006a6d R09: 0000000000000000 R10: ffff8801d9ae8bb8 R11: ffff8801d9ae8380 R12: ffffed003b35eefe R13: dffffc0000000000 R14: b3db62fefa62f140 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f056df9b000 CR3: 00000001ac088000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3924 seqcount_lockdep_reader_access include/linux/seqlock.h:81 [inline] read_seqcount_begin include/linux/seqlock.h:164 [inline] read_seqbegin include/linux/seqlock.h:433 [inline] tick_nohz_next_event+0x131/0x880 kernel/time/tick-sched.c:655 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:930 [inline] tick_nohz_idle_stop_tick+0x621/0xd20 kernel/time/tick-sched.c:960 cpuidle_idle_call kernel/sched/idle.c:150 [inline] do_idle+0x38b/0x560 kernel/sched/idle.c:262 cpu_startup_entry+0x104/0x120 kernel/sched/idle.c:368 start_secondary+0x42b/0x5c0 arch/x86/kernel/smpboot.c:265 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242