Hi again,
I am currently running a self-compiled Linux kernel at Git tag v7.0-rc5. I
have attached my .config. With that, the same problem occurred again today:
[ 8326.351887] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 8326.351900] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-15):
P191262/1:b..l
[ 8326.351908] rcu: (detected by 5, t=5252 jiffies, g=730289, q=52781
ncpus=16)
[ 8326.351911] task:zoom state:R running task stack:0
pid:191262 tgid:191262 ppid:1511 task_flags:0x40040c flags:0x00080802
[ 8326.351923] Call Trace:
[ 8326.351928]
[ 8326.351943] __schedule+0x47c/0x1000
[ 8326.351976] preempt_schedule_irq+0x38/0x60
[ 8326.351983] asm_common_interrupt+0x26/0x40
[ 8326.351996] RIP: 0010:preempt_schedule+0x44/0x50
[ 8326.352000] Code: 40 00 f6 c4 02 74 f0 65 ff 05 f8 79 b2 01 bf 01 00 00 00
e8 ce ed ff ff 65 48 8b 05 ce 79 b2 01 65 ff 0d df 79 b2 01 48 8b 00 10 75
d9 e9 ae 4a fa fe 0f 1f 00 90 90 90 90 90 90 90 90 90 90
[ 8326.352003] RSP: 0018:ffffd078c9427930 EFLAGS: 00000246
[ 8326.352008] RAX: 0000000000080812 RBX: ffff8e4dab690000 RCX: 0000000000000002
[ 8326.352011] RDX: 0000000000000001 RSI: 0000000055555554 RDI: ffff8e5ae1f72148
[ 8326.352013] RBP: ffffd078c9427980 R08: 0000078e6a0f1f90 R09: 0000000000000001
[ 8326.352014] R10: 0000000000000005 R11: 0000000000000002 R12:
0000000000000004
[ 8326.352016] R13: 0000000000000000 R14: 0000557917600000 R15: ffff8e4f2a9555d8
[ 8326.352025] preempt_schedule_thunk+0x16/0x30
[ 8326.352038] _raw_spin_unlock+0x22/0x30
[ 8326.352048] unmap_page_range+0xb90/0x19e0
[ 8326.352061] unmap_vmas+0xb1/0x180
[ 8326.352065] exit_mmap+0x122/0x3c0
[ 8326.352077] __mmput+0x41/0x150
[ 8326.352091] do_exit+0x267/0xab0
[ 8326.352096] do_group_exit+0x2d/0xc0
[ 8326.352098] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8326.352101] get_signal+0x921/0x930
[ 8326.352116] arch_do_signal_or_restart+0x40/0x250
[ 8326.352133] exit_to_user_mode_loop+0x8e/0x480
[ 8326.352138] ? __x64_sys_sched_setaffinity+0x6a/0xb0
[ 8326.352144] do_syscall_64+0x2a6/0x1600
[ 8326.352150] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8326.352152] ? kmem_cache_free+0x25b/0x410
[ 8326.352162] ? __x64_sys_close+0x3d/0x80
[ 8326.352168] ? __fput+0x171/0x2a0
[ 8326.352175] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8326.352177] ? __x64_sys_close+0x3d/0x80
[ 8326.352179] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8326.352181] ? do_syscall_64+0x159/0x1600
[ 8326.352183] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8326.352185] ? do_syscall_64+0x159/0x1600
[ 8326.352187] ? irqentry_exit+0x6e/0x570
[ 8326.352193] ? exc_page_fault+0x82/0x1d0
[ 8326.352195] ? __irq_exit_rcu+0x3d/0xe0
[ 8326.352208] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 8326.352211] RIP: 0033:0x7f8f14a60e2d
[ 8326.352263] RSP: 002b:00007ffd71d56648 EFLAGS: 00000246 ORIG_RAX:
00000000000000cb
[ 8326.352265] RAX: 0000000000000000 RBX: 00007f8f10842880 RCX:
00007f8f14a60e2d
[ 8326.352267] RDX: 00007ffd71d56650 RSI: 0000000000000080 RDI:
000000000002eb1e
[ 8326.352268] RBP: 0000000000000020 R08: 0000000000000001 R09:
00007f8f10841ed8
[ 8326.352269] R10: 0000000000000000 R11: 0000000000000246 R12:
00007ffd71d56650
[ 8326.352270] R13: 00007ffd71d567f0 R14: 0000000000000000 R15:
0000000000000020
[ 8326.352274]
[ 8328.823796] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks:
{ P191262 } 5306 jiffies s: 3329 root: 0x0/T
[ 8328.823810] rcu: blocking rcu_node structures (internal RCU debug):
[ 8389.369351] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 8389.369364] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-15):
P191262/1:b..l
[ 8389.369370] rcu: (detected by 6, t=21007 jiffies, g=730289, q=201897
ncpus=16)
[ 8389.369373] task:zoom state:R running task stack:0
pid:191262 tgid:191262 ppid:1511 task_flags:0x40040c flags:0x00080802
[ 8389.369380] Call Trace:
[ 8389.369382]
[ 8389.369387] __schedule+0x47c/0x1000
[ 8389.369400] preempt_schedule_irq+0x38/0x60
[ 8389.369403] asm_common_interrupt+0x26/0x40
[ 8389.369408] RIP: 0010:preempt_schedule+0x44/0x50
[ 8389.369411] Code: 40 00 f6 c4 02 74 f0 65 ff 05 f8 79 b2 01 bf 01 00 00 00
e8 ce ed ff ff 65 48 8b 05 ce 79 b2 01 65 ff 0d df 79 b2 01 48 8b 00 10 75
d9 e9 ae 4a fa fe 0f 1f 00 90 90 90 90 90 90 90 90 90 90
[ 8389.369413] RSP: 0018:ffffd078c9427930 EFLAGS: 00000246
[ 8389.369416] RAX: 0000000000080812 RBX: ffff8e4dab690000 RCX: 0000000000000002
[ 8389.369417] RDX: 0000000000000001 RSI: 0000000055555554 RDI: ffff8e5ae1f72148
[ 8389.369419] RBP: ffffd078c9427980 R08: 0000078e6a0f1f90 R09: 0000000000000001
[ 8389.369420] R10: 0000000000000005 R11: 0000000000000002 R12:
0000000000000004
[ 8389.369421] R13: 0000000000000000 R14: 0000557917600000 R15: ffff8e4f2a9555d8
[ 8389.369426] preempt_schedule_thunk+0x16/0x30
[ 8389.369432] _raw_spin_unlock+0x22/0x30
[ 8389.369437] unmap_page_range+0xb90/0x19e0
[ 8389.369445] unmap_vmas+0xb1/0x180
[ 8389.369449] exit_mmap+0x122/0x3c0
[ 8389.369456] __mmput+0x41/0x150
[ 8389.369465] do_exit+0x267/0xab0
[ 8389.369469] do_group_exit+0x2d/0xc0
[ 8389.369472] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8389.369474] get_signal+0x921/0x930
[ 8389.369484] arch_do_signal_or_restart+0x40/0x250
[ 8389.369496] exit_to_user_mode_loop+0x8e/0x480
[ 8389.369501] ? __x64_sys_sched_setaffinity+0x6a/0xb0
[ 8389.369505] do_syscall_64+0x2a6/0x1600
[ 8389.369510] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8389.369512] ? kmem_cache_free+0x25b/0x410
[ 8389.369518] ? __x64_sys_close+0x3d/0x80
[ 8389.369521] ? __fput+0x171/0x2a0
[ 8389.369525] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8389.369527] ? __x64_sys_close+0x3d/0x80
[ 8389.369529] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8389.369530] ? do_syscall_64+0x159/0x1600
[ 8389.369532] ? srso_alias_return_thunk+0x5/0xfbef5
[ 8389.369534] ? do_syscall_64+0x159/0x1600
[ 8389.369536] ? irqentry_exit+0x6e/0x570
[ 8389.369539] ? exc_page_fault+0x82/0x1d0
[ 8389.369541] ? __irq_exit_rcu+0x3d/0xe0
[ 8389.369544] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 8389.369546] RIP: 0033:0x7f8f14a60e2d
[ 8389.369595] RSP: 002b:00007ffd71d56648 EFLAGS: 00000246 ORIG_RAX:
00000000000000cb
[ 8389.369599] RAX: 0000000000000000 RBX: 00007f8f10842880 RCX:
00007f8f14a60e2d
[ 8389.369601] RDX: 00007ffd71d56650 RSI: 0000000000000080 RDI:
000000000002eb1e
[ 8389.369604] RBP: 0000000000000020 R08: 0000000000000001 R09:
00007f8f10841ed8
[ 8389.369606] R10: 0000000000000000 R11: 0000000000000246 R12:
00007ffd71d56650
[ 8389.369608] R13: 00007ffd71d567f0 R14: 0000000000000000 R15:
0000000000000020
[ 8389.369615]
Unfortunately, I still do not know how to reproduce it. I just want to inform
you that it still happens to me with the latest kernel.
Kind regards
Benjamin