> On Mar 6, 2020, at 10:33 PM, Qian Cai <cai@xxxxxx> wrote: > > > >> On Mar 5, 2020, at 11:06 PM, Qian Cai <cai@xxxxxx> wrote: >> > > Using this config, > >> https://raw.githubusercontent.com/cailca/linux-mm/master/x86.config > > Reverted the linux-next commit d441dceb5dce (“tick/common: Make tick_periodic() check for missing ticks”) > fixed the lockup that could easily happen during boot. Thomas or Stephen, can you back out this patch from linux-next while Waiman is getting to the bottom of it? I can still reproduce it as today. [ 0.021353][ T1] ... fixed-purpose events: 0 [ 0.021353][ T1] ... event mask: 000000000000003f [ 0.021353][ T1] rcu: Hierarchical SRCU implementation. [ 0.021353][ T5] NMI watchdog: Enabled. Permanently consumes one hw-PMU counter. [ 0.021353][ T1] smp: Bringing up secondary CPUs ... [ 0.021353][ T1] x86: Booting SMP configuration: [ 0.021353][ T1] .... node #0, CPUs: #1 [ 0.021353][ T1] .... node #1, CPUs: #2 [ 0.021353][ T1] #3 [ 0.021353][ T1] .... node #2, CPUs: #4 [ 0.021353][ T1] #5 [ 0.021353][ T1] .... node #3, CPUs: #6 [ 0.021353][ T1] #7 [ 0.021353][ T1] .... node #4, CPUs: #8 [ 0.000000][ T0] smpboot: CPU 8 Converting physical 0 to logical die 1 [ 0.021353][ C0] NMI watchdog: Watchdog detected hard LOCKUP on cpu 0 [ 0.021353][ C0] Modules linked in: [ 0.021353][ C0] irq event stamp: 51754775 [ 0.021353][ C0] hardirqs last enabled at (51754775): [<ffffffff936a8117>] _raw_spin_unlock_irq+0x27/0x40 [ 0.021353][ C0] hardirqs last disabled at (51754774): [<ffffffff9369c394>] __schedule+0x214/0x1070 [ 0.021353][ C0] softirqs last enabled at (78480): [<ffffffff93a00447>] __do_softirq+0x447/0x766 [ 0.021353][ C0] softirqs last disabled at (78463): [<ffffffff92cd2226>] irq_exit+0xd6/0xf0 [ 0.021353][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.6.0-rc6-next-20200319 #1 [ 0.021353][ C0] Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 Gen10, BIOS A40 03/09/2018 [ 0.021353][ C0] RIP: 0010:lock_is_held_type+0x3e/0x150 [ 0.021353][ C0] Code: 02 00 48 83 ec 18 48 89 7d d0 48 8d bb 74 08 00 00 89 75 c4 e8 23 fe 28 00 8b 8b 74 08 00 00 85 c9 0f 85 02 01 00 00 9c 41 5e <fa> 48 c7 c7 b4 8c 93 94 e8 05 fe 28 00 8b 15 23 b8 ba 01 85 d2 74 [ 0.021353][ C0] RSP: 0018:ffffc90003177a88 EFLAGS: 00000246 [ 0.021353][ C0] RAX: 0000000000000000 RBX: ffff888480e0c040 RCX: 0000000000000000 [ 0.021353][ C0] RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff888480e0c8b4 [ 0.021353][ C0] RBP: ffffc90003177ac8 R08: ffffed110f700fb9 R09: 0000000000000001 [ 0.021353][ C0] R10: ffff88887b807dc7 R11: ffffed110f700fb8 R12: ffff888480e0c040 [ 0.021353][ C0] R13: 0000000000000000 R14: 0000000000000246 R15: ffff888453444340 [ 0.021353][ C0] FS: 0000000000000000(0000) GS:ffff888453400000(0000) knlGS:0000000000000000 [ 0.021353][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.021353][ C0] CR2: ffff88887b9ff000 CR3: 00000003a7e12000 CR4: 00000000003406f0 [ 0.021353][ C0] Call Trace: [ 0.021353][ C0] __schedule+0x821/0x1070 [ 0.021353][ C0] ? firmware_map_remove+0xe9/0xe9 [ 0.021353][ C0] schedule+0x95/0x160 [ 0.021353][ C0] do_boot_cpu+0x58c/0xaf0 [ 0.021353][ C0] native_cpu_up+0x298/0x430 [ 0.021353][ C0] ? common_cpu_up+0x150/0x150 [ 0.021353][ C0] bringup_cpu+0x44/0x310 [ 0.021353][ C0] ? timers_prepare_cpu+0x114/0x190 [ 0.021353][ C0] ? takedown_cpu+0x2e0/0x2e0 [ 0.021353][ C0] cpuhp_invoke_callback+0x197/0x1120 [ 0.021353][ C0] ? ring_buffer_record_is_set_on+0x40/0x40 [ 0.021353][ C0] _cpu_up+0x171/0x280 [ 0.021353][ C0] do_cpu_up+0xb1/0x120 [ 0.021353][ C0] cpu_up+0x13/0x20 [ 0.021353][ C0] smp_init+0x91/0x118 [ 0.021353][ C0] kernel_init_freeable+0x221/0x4f8 [ 0.021353][ C0] ? mark_held_locks+0x34/0xb0 [ 0.021353][ C0] ? _raw_spin_unlock_irq+0x27/0x40 [ 0.021353][ C0] ? start_kernel+0x8c0/0x8c0 [ 0.021353][ C0] ? lockdep_hardirqs_on+0x1b0/0x2a0 [ 0.021353][ C0] ? _raw_spin_unlock_irq+0x27/0x40 [ 0.021353][ C0] ? rest_init+0x307/0x307 [ 0.021353][ C0] kernel_init+0x11/0x139 [ 0.021353][ C0] ? rest_init+0x307/0x307 [ 0.021353][ C0] ret_from_fork+0x27/0x50 > >> >> [ 0.013514][ C0] NMI watchdog: Watchdog detected hard LOCKUP on cpu 0 >> [ 0.013514][ C0] Modules linked in: >> [ 0.013514][ C0] irq event stamp: 64186318 >> [ 0.013514][ C0] hardirqs last enabled at (64186317): [<ffffffff84c9b107>] _raw_spin_unlock_irq+0x27/0x40 >> [ 0.013514][ C0] hardirqs last disabled at (64186318): [<ffffffff84c8f384>] __schedule+0x214/0x1070 >> [ 0.013514][ C0] softirqs last enabled at (267904): [<ffffffff85000447>] __do_softirq+0x447/0x766 >> [ 0.013514][ C0] softirqs last disabled at (267897): [<ffffffff842d1f16>] irq_exit+0xd6/0xf0 >> [ 0.013514][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.6.0-rc4-next-20200305+ #6 >> [ 0.013514][ C0] Hardware name: HP ProLiant BL660c Gen9, BIOS I38 10/17/2018 >> [ 0.013514][ C0] RIP: 0010:lock_is_held_type+0x12a/0x150 >> [ 0.013514][ C0] Code: 41 0f 94 c4 65 48 8b 1c 25 40 0f 02 00 48 8d bb 74 08 00 00 e8 77 c0 28 00 c7 83 74 08 00 00 00 00 00 00 41 56 9d 48 83 c4 18 <44> 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 45 31 e4 eb c7 41 bc 01 >> [ 0.013514][ C0] RSP: 0000:ffffc9000628f9f8 EFLAGS: 00000082 >> [ 0.013514][ C0] RAX: 0000000000000000 RBX: ffff889880efc040 RCX: ffffffff8438b449 >> [ 0.013514][ C0] RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff889880efc8b4 >> [ 0.013514][ C0] RBP: ffffc9000628fa20 R08: ffffed1108588a24 R09: ffffed1108588a24 >> [ 0.013514][ C0] R10: ffff888842c4511b R11: 0000000000000000 R12: 0000000000000000 >> [ 0.013514][ C0] R13: ffff889880efc908 R14: 0000000000000046 R15: 0000000000000003 >> [ 0.013514][ C0] FS: 0000000000000000(0000) GS:ffff888842c00000(0000) knlGS:0000000000000000 >> [ 0.013514][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 >> [ 0.013514][ C0] CR2: ffff88a0707ff000 CR3: 0000000b72012001 CR4: 00000000001606f0 >> [ 0.013514][ C0] Call Trace: >> [ 0.013514][ C0] rcu_read_lock_sched_held+0xac/0xe0 >> lock_is_held at include/linux/lockdep.h:361 >> (inlined by) rcu_read_lock_sched_held at kernel/rcu/update.c:121 >> [ 0.013514][ C0] ? rcu_read_lock_bh_held+0xc0/0xc0 >> [ 0.013514][ C0] rcu_note_context_switcx186/0x3b0 >> [ 0.013514][ C0] __schedule+0x21f/0x1070 >> [ 0.013514][ C0] ? __sched_text_start+0x8/0x8 >> [ 0.013514][ C0] schedule+0x95/0x160 >> [ 0.013514][ C0] do_boot_cpu+0x58c/0xaf0 >> [ 0.013514][ C0] native_cpu_up+0x298/0x430 >> [ 0.013514][ C0] ? common_cpu_up+0x150/0x150 >> [ 0.013514][ C0] bringup_cpu+0x44/0x310 >> [ 0.013514][ C0] ? timers_prepare_cpu+0x114/0x190 >> [ 0.013514][ C0] ? takedown_cpu+0x2e0/0x2e0 >> [ 0.013514][ C0] cpuhp_invoke_callback+0x197/0x1120 >> [ 0.013514][ C0] ? ring_buffer_record_is_set_on+0x40/0x40 >> [ 0.013514][ C0] _cpu_up+0x171/0x280 >> [ 0.013514][ C0] do_cpu_up+0xb1/0x120 >> [ 0.013514][ C0] cpu_up+0x13/0x20 >> [ 0.013514][ C0] smp_init+0x91/0x118 >> [ 0.013514][ C0] kernel_init_freeable+0x221/0x4f8 >> [ 0.013514][ C0] ? mark_held_locks+0x34/0xb0 >> [ 0.013514][ C0] ? _raw_spin_unlock_irq+0x27/0x40 >> [ 0.013514][ C0] ? start_kernel+0x876/0x876 >> [ 0.013514][ C0] ? lockdep_hardirqs_on+0x1b0/0x2a0 >> [ 0.013514][ C0] ? _raw_spin_unlock_irq+0x27/0x40 >> [ 0.013514][ C0] ? rest_init+0x307/0x307 >> [ 0.013514][ C0] kernel_init+0x 0.013514][ C0] ? rest_init+0x307/0x307 >> [ 0.013514][ C0] ret_from_fork+0x3a/0x50 >> > > We could have many slightly different traces, > > [ 0.000000][ T0] smpboot: CPU 8 Converting physical 0 to logical die 1 > [ 0.021496][ C0] NMI watchdog: Watchdog detected hard LOCKUP on cpu 0 > [ 0.021496][ C0] Modules linked in: > [ 0.021496][ C0] irq event stamp: 53241496 > [ 0.021496][ C0] hardirqs last enabled at (53241495): [<ffffffffa9c8c037>] _raw_spin_unlock_irq+0x27/0x40 > [ 0.021496][ C0] hardirqs last disabled at (53241496): [<ffffffffa9c80244>] __schedule+0x214/0x1070 > [ 0.021496][ C0] softirqs last enabled at (88160): [<ffffffffaa000447>] __do_softirq+0x447/0x766 > [ 0.021496][ C0] softirqs last disabled at (88153): [<ffffffffa92d0c66>] irq_exit+0xd6/0xf0 > [ 0.021496][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.6.0-rc4+ #25 > [ 0.021496][ C0] Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 Gen10, BIOS A40 03/09/2018 > [ 0.021496][ C0] RIP: 0010:__asan_load8+0x0/0xa0 > [ 0.021496][ C0] Code: e8 03 0f b6 04 30 84 c0 74 c2 38 d0 0f 9e c0 84 c0 74 b9 ba 01 00 00 00 be 04 00 00 00 e8 c8 e3 ff ff 5d c3 66 0f 1f 44 00 00 <55> 48 89 e5 48 8b 4d 08 eb 3a 0f 1f 00 48 b8 00 00 00 00 00 00 00 > [ 0.021496][ C0] RSP: 0018:ffffc900031779d8 EFLAGS: 00000082 > [ 0.021496][ C0] RAX: 000000000000000f RBX: ffff88820f118040 RCX: ffffffffa9386e1c > [ 0.021496][ C0] RDX: ffff88820f1188b0 RSI: ffff8884534442d8 RDI: ffff88820f118938 > [ 0.021496][ C0] RBP: ffffc90003177a10 R08: ffffed1041e23009 R09: ffffed1041e23009 > [ 0.021496][ C0] R10: ffffed1041e23008 R11: 0000000000000000 R12: ffff88820f118928 > [ 0.021496][ C0] R13: ffff8884534442d8 R14: 0000000000000003 R15: ffff88820f118928 > [ 0.021496][ C0] FS: 0000000000000000(0000) GS:ffff888453400000(0000) knlGS:0000000000000000 > [ 0.021496][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 0.021496][ C0] CR2: ffff88887b9ff000 CR3: 0000000257c12000 CR4: 00000000003406f0 > [ 0.021496][ C0] Call Trace: > [ 0.021496][ C0] ? match_held_lock+0x20/0x250 > [ 0.021496][ C0] lock_unpin_lock+0x16a/0x260 > [ 0.021496][ C0] ? lock_repin_lock+0x210/0x210 > [ 0.021496][ C0] ? __kasan_check_read+0x11/0x20 > [ 0.021496][ C0] ? pick_next_task_fair+0x3a6/0x6b0 > [ 0.021496][ C0] __schedule+0xd4f/0x1070 > [ 0.021496][ C0] ? firmware_map_remove+0xee/0xee > [ 0.021496][ C0] ? schedule+0xc9/0x160 > [ 0.021496][ C0] schedule+0x95/0x160 > [ 0.021496][ C0] do_boot_cpu+0x58c/0xaf0 > [ 0.021496][ C0] native_cpu_up+0x298/0x430 > [ 0.021496][ C0] ? common_cpu_up+0x150/0x150 > [ 0.021496][ C0] bringup_cpu+0x44/0x310 > [ 0.021496][ C0] ? timers_prepare_cpu+0x114/0x190 > [ 0.021496][ C0] ? takedown_cpu+0x2e0/0x2e0 > [ 0.021496][ C0] cpuhp_invoke_callback+0x197/0x1120 > [ 0.021496][ C0] ? ring_buffer_record_is_set_on+0x40/0x40 > [ 0.021496][ C0] _cpu_up+0x171/0x280 > [ 0.021496][ C0] do_cpu_up+0xb1/0x120 > [ 0.021496][ C0] cpu_up+0x13/0x20 > [ 0.021496][ C0] smp_init+0x91/0x118 > [ 0.021496][ C0] kernel_init_freeable+0x221/0x4f8 > [ 0.021496][ C0] ? mark_held_locks+0x34/0xb0 > [ 0.021496][ C0] ? _raw_spin_unlock_irq+0x27/0x40 > [ 0.021496][ C0] ? start_kernel+0x857/0x857 > [ 0.021496][ C0] ? lockdep_hardirqs_on+0x1b0/0x2a0 > [ 0.021496][ C0] ? _raw_spin_unlock_irq+0x27/0x40 > [ 0.021496][ C0] ? rest_init+0x307/0x307 > [ 0.021496][ C0] kernel_init+0x11/0x139 > [ 0.021496][ C0] ? rest_init+0x307/0x307 > [ 0.021496][ C0] ret_from_fork+0x27/0x50 > > [ 0.021458][ C0] NMI watchdog: Watchdog detected hard LOCKUP on cpu 0 > [ 0.021458][ C0] Modules linked in: > [ 0.021458][ C0] irq event stamp: 55574034 > [ 0.021458][ C0] hardirqs last enabled at (55574033): [<ffffffffa549d4d7>] _raw_spin_unlock_irq+0x27/0x40 > [ 0.021458][ C0] hardirqs last disabled at (55574034): [<ffffffffa5491754>] __schedule+0x214/0x1070 > [ 0.021458][ C0] softirqs last enabled at (83640): [<ffffffffa5800447>] __do_softirq+0x447/0x766 > [ 0.021458][ C0] softirqs last disabled at (83623): [<ffffffffa4ad2196>] irq_exit+0xd6/0xf0 > [ 0.021458][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.6.0-rc4+ #13 > [ 0.021458][ C0] Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 Gen10, BIOS A40 03/09/2018 > [ 0.021458][ C0] RIP: 0010:check_memory_region+0x136/0x200 > [ 0.021458][ C0] Code: 00 eb 0c 49 83 c0 01 48 89 d8 49 39 d8 74 10 41 80 38 00 74 ee 4b 8d 44 0d 00 4d 85 c0 75 4d 4c 89 e3 48 29 c3 e9 3e ff ff ff <48> 85 db 74 2e 41 80 39 00 75 34 48 b8 01 00 00 00 00 fc ff df 49 > [ 0.021458][ C0] RSP: 0018:ffffc900031779e8 EFLAGS: 00000083 > [ 0.021458][ C0] RAX: fffff5200062ef48 RBX: 0000000000000001 RCX: ffffffffa4b94e16 > [ 0.021458][ C0] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90003177a40 > [ 0.021458][ C0] RBP: ffffc90003177a00 R08: 1ffff9200062ef48 R09: fffff5200062ef48 > [ 0.021458][ C0] R10: fffff5200062ef48 R11: ffffc90003177a43 R12: fffff5200062ef49 > [ 0.021458][ C0] R13: ffffc90003177a80 R14: ffff888453444310 R15: ffff888453444308 > [ 0.021458][ C0] FS: 0000000000000000(0000) GS:ffff888453400000(0000) knlGS:0000000000000000 > [ 0.021458][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 0.021458][ C0] CR2: ffff88887b9ff000 CR3: 00000006e6c12000 CR4: 00000000003406f0 > [ 0.021458][ C0] Call Trace: > [ 0.021458][ C0] __kasan_check_write+0x14/0x20 > [ 0.021458][ C0] do_raw_spin_lock+0xe6/0x1e0 > [ 0.021458][ C0] ? rwlock_bug.part.1+0x60/0x60 > [ 0.021458][ C0] ? __schedule+0x227/0x1070 > [ 0.021458][ C0] _raw_spin_lock+0x37/0x40 > [ 0.021458][ C0] ? __schedule+0x227/0x1070 > [ 0.021458][ C0] __schedule+0x227/0x1070 > [ 0.021458][ C0] ? __sched_text_start+0x8/0x8 > [ 0.021458][ C0] schedule+0x95/0x160 > [ 0.021458][ C0] do_boot_cpu+0x58c/0xaf0 > [ 0.021458][ C0] native_cpu_up+0x298/0x430 > [ 0.021458][ C0] ? common_cpu_up+0x150/0x150 > [ 0.021458][ C0] bringup_cpu+0x44/0x310 > [ 0.021458][ C0] ? timers_prepare_cpu+0x114/0x190 > [ 0.021458][ C0] ? takedown_cpu+0x2e0/0x2e0 > [ 0.021458][ C0] cpuhp_invoke_callback+0x197/0x1120 > [ 0.021458][ C0] ? ring_buffer_record_is_set_on+0x40/0x40 > [ 0.021458][ C0] _cpu_up+0x171/0x280 > [ 0.021458][ C0] do_cpu_up+0xb1/0x120 > [ 0.021458][ C0] cpu_up+0x13/0x20 > [ 0.021458][ C0] smp_init+0x91/0x118 > [ 0.021458][ C0] kernel_init_freeable+0x221/0x4f8 > [ 0.021458][ C0] ? mark_held_locks+0x34/0xb0 > [ 0.021458][ C0] ? _raw_spin_unlock_irq+0x27/0x40 > [ 0.021458][ C0] ? start_kernel+0x876/0x876 > [ 0.021458][ C0] ? lockdep_hardirqs_on+0x1b0/0x2a0 > [ 0.021458][ C0] ? _raw_spin_unlock_irq+0x27/0x40 > [ 0.021458][ C0] ? rest_init+0x307/0x307 > [ 0.021458][ C0] kernel_init+0x11/0x139 > [ 0.021458][ C0] ? rest_init+0x307/0x307 > [ 0.021458][ C0] ret_from_fork+0x27/0x50 > > >
