Sleeping thread (tid 103993, pid 97857) owns a non-sleepable lock
KDB: stack backtrace of thread 103993:
0xc00800021c019280: at mi_switch+0x134
0xc00800021c019300: at sleepq_lookup+0x4f8
0xc00800021c019340: at sleepq_lookup+0xe00
0xc00800021c0193c0: at sleepq_wait_sig+0x24
0xc00800021c019400: at _sleep+0x554
0xc00800021c0194c0: at pipeselwakeup+0x1d24
0xc00800021c019560: at sys_cap_fcntls_get+0x1d8
0xc00800021c0195c0: at kern_readv+0x94
0xc00800021c019620: at sys_read+0x7c
0xc00800021c0196a0: at trap+0x53c
0xc00800021c0197c0: at powerpc_interrupt+0xf4
0xc00800021c019810: user SC trap by 0x8102b2c48: srr1=0x900000000000f032
            r1=0xfffffbfff9e10 cr=0x48002024 xer=0x20040000 ctr=0x8102b2c40 r2=0x81030e710
spin lock 0xc000000003cb1388 (sleepq chain) held by 0xc00000157f4ac580 (tid 104002) too long
timeout stopping cpus
panic: sleeping thread
cpuid = 67
time = 1544580197
KDB: stack backtrace:
0xc00800021c073670: at kdb_backtrace+0xb8
0xc00800021c073780: at vpanic+0x25c
0xc00800021c073830: at panic+0x3c
0xc00800021c073860: at syscallname+0x6f4
0xc00800021c073900: at turnstile_wait+0x21c
0xc00800021c073970: at __mtx_lock_sleep+0x33c
0xc00800021c073a20: at vm_reserv_reclaim_contig+0x180
0xc00800021c073ae0: at vm_page_alloc_contig_domain+0x248
0xc00800021c073c00: at vm_page_alloc_contig+0xb8
0xc00800021c073d00: at moea64_late_bootstrap+0x190c
0xc00800021c073da0: at vmspace_swap_count+0xd20
0xc00800021c073df0: at uma_zalloc_arg+0x4dc
0xc00800021c073ea0: at mmu_radix_pmap_pinit+0x3c
0xc00800021c073ef0: at pmap_pinit+0x38
0xc00800021c073f30: at vmspace_alloc+0x6c
0xc00800021c073f80: at vmspace_exec+0x3c
0xc00800021c073fc0: at exec_new_vmspace+0x2c8
0xc00800021c074050: at cd9660_vget_internal+0x5804
0xc00800021c0741d0: at exec_check_permissions+0x1798
0xc00800021c0745c0: at kern_execve+0x60
0xc00800021c074600: at sys_execve+0xb0
0xc00800021c0746a0: at trap+0x53c
0xc00800021c0747c0: at powerpc_interrupt+0xf4
0xc00800021c074810: user SC trap by 0x81024c730: srr1=0x900000000000f032
            r1=0xfffffbfffd4d0 cr=0x40004824 xer=0x20040000 ctr=0x81024c720 r2=0x810348100
KDB: enter: panic
[ thread pid 1057 tid 104002 ]
Stopped at      kdb_enter+0x78: ori     r0, r0, 0x0
db> timeout stopping cpus
panic: spin lock held too long
cpuid = 4
time = 1544580197
KDB: stack backtrace:
0xc0080001ce1ec1a0: at kdb_backtrace+0xb8
0xc0080001ce1ec2b0: at vpanic+0x25c
0xc0080001ce1ec360: at panic+0x3c
0xc0080001ce1ec390: at mtx_pool_alloc+0x3b4
0xc0080001ce1ec400: at thread_lock_flags_+0x140
0xc0080001ce1ec4a0: at _thread_lock+0xf8
0xc0080001ce1ec4e0: at ruxagg+0x30
0xc0080001ce1ec520: at rufetch+0x64
0xc0080001ce1ec560: at fill_kinfo_proc+0x434
0xc0080001ce1ec5d0: at kern_proc_out+0x58
0xc0080001ce1ecdb0: at kern_proc_out+0x300
0xc0080001ce1ed290: at kern_proc_out+0x67c
0xc0080001ce1ed2f0: at proc_iterate+0x174
0xc0080001ce1ed350: at proc_iterate+0x370
0xc0080001ce1ed3c0: at syscall_helper_unregister+0xb00
0xc0080001ce1ed420: at sysctl_find_oid+0x5b4
0xc0080001ce1ed4c0: at userland_sysctl+0x144
0xc0080001ce1ed5a0: at sys___sysctl+0xb4
0xc0080001ce1ed6a0: at trap+0x53c
0xc0080001ce1ed7c0: at powerpc_interrupt+0xf4
0xc0080001ce1ed810: user SC trap by 0x8103e3718: srr1=0x900000000000f032
            r1=0xfffffbfffe360 cr=0x42024044 xer=0 ctr=0x8103e3710 r2=0x81043e710
Uptime: 8h54m24s
[32237.077690998,5] OPAL: Reboot request...