Hard lockup at prepare_to_wait()
Issue
- System crashed due to hard lockup which showed the below call trace in the process
crash> bt
PID: 66 TASK: ffff881fd3705c00 CPU: 4 COMMAND: "rcuos/23"
#0 [ffff881ffff05e70] crash_nmi_callback at ffffffff81045982
#1 [ffff881ffff05e80] nmi_handle at ffffffff8163f719
#2 [ffff881ffff05ec8] do_nmi at ffffffff8163f830
#3 [ffff881ffff05ef0] end_repeat_nmi at ffffffff8163eb53
[exception RIP: _raw_spin_lock_irqsave+0x3d]
RIP: ffffffff8163dfdd RSP: ffff881fd3733dd0 RFLAGS: 00000006
RAX: 000000000000552e RBX: ffff881fd3733e80 RCX: 000000000000f19a
RDX: 000000000000f198 RSI: 000000000000f19a RDI: ffffffff819a71c8
RBP: ffff881fd3733dd0 R8: 0000000000000246 R9: 0000000000000003
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff819a71c8
R13: 0000000000000001 R14: ffffffff819a7140 R15: ffffffff819a71c8
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
--- <NMI exception stack> ---
#4 [ffff881fd3733dd0] _raw_spin_lock_irqsave at ffffffff8163dfdd
#5 [ffff881fd3733dd8] prepare_to_wait at ffffffff810a6877
#6 [ffff881fd3733e10] rcu_nocb_kthread at ffffffff8112438e
#7 [ffff881fd3733ec8] kthread at ffffffff810a5b8f
#8 [ffff881fd3733f50] ret_from_fork at ffffffff81646bd8
Environment
- Red Hat Enterprise Linux 7
- kernel-3.10.0-327.41.3.el7
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