kernel: Sleeping thread (tid 100922, pid 1172) owns a non-sleepable lock
kernel: KDB: stack backtrace of thread 100922:
kernel: #0 0xffffffff80ba6de1 at mi_switch+0xe1
kernel: #1 0xffffffff80bf5c45 at sleepq_catch_signals+0x405
kernel: #2 0xffffffff80bf578f at sleepq_wait_sig+0xf
kernel: #3 0xffffffff8266a54a at rtR0SemEventWait+0x2ba
kernel: #4 0xffffffff82649333 at SUPSemEventWaitNoResume+0x93
kernel: #5 0xffffffff8263fc66 at supdrvIOCtlInnerUnrestricted+0x986
kernel: #6 0xffffffff8264e3fd at VBoxDrvFreeBSDIOCtl+0xed
kernel: #7 0xffffffff80a51acd at devfs_ioctl+0xad
kernel: #8 0xffffffff811f945e at VOP_IOCTL_APV+0x7e
kernel: #9 0xffffffff80c7a144 at vn_ioctl+0x1a4
kernel: #10 0xffffffff80a520af at devfs_ioctl_f+0x1f
kernel: #11 0xffffffff80c04f3d at kern_ioctl+0x26d
kernel: #12 0xffffffff80c04c5e at sys_ioctl+0x15e
kernel: #13 0xffffffff81075449 at amd64_syscall+0x369
kernel: #14 0xffffffff8104fd1d at fast_syscall_common+0x101
kernel: panic: sleeping thread
kernel: cpuid = 3
kernel: time = 1555196191
kernel: KDB: stack backtrace:
kernel: #0 0xffffffff80be7977 at kdb_backtrace+0x67
kernel: #1 0xffffffff80b9b563 at vpanic+0x1a3
kernel: #2 0xffffffff80b9b3b3 at panic+0x43
kernel: #3 0xffffffff80bfd412 at propagate_priority+0x2b2
kernel: #4 0xffffffff80bfe048 at turnstile_wait+0x338
kernel: #5 0xffffffff80b7ade6 at __mtx_lock_sleep+0x196
kernel: #6 0xffffffff80f013dc at vm_reserv_reclaim_inactive+0x9c
kernel: #7 0xffffffff80ef2db0 at vm_page_alloc_domain_after+0x210
kernel: #8 0xffffffff80ef2aa4 at vm_page_alloc+0x74
kernel: #9 0xffffffff8106449e at get_pv_entry+0x5e
kernel: #10 0xffffffff8106386c at pmap_enter+0x78c
kernel: #11 0xffffffff80edc78e at vm_fault_hold+0x1dfe
kernel: #12 0xffffffff80eda940 at vm_fault+0x60
kernel: #13 0xffffffff81074ae3 at trap_pfault+0x163
kernel: #14 0xffffffff81074175 at trap+0x425
kernel: #15 0xffffffff8104f435 at calltrap+0x8
kernel: Uptime: 28s

kernel: Sleeping thread (tid 100920, pid 1245) owns a non-sleepable lock
kernel: KDB: stack backtrace of thread 100920:
kernel: #0 0xffffffff80ba6de1 at mi_switch+0xe1
kernel: #1 0xffffffff80bf5c45 at sleepq_catch_signals+0x405
kernel: #2 0xffffffff80bf578f at sleepq_wait_sig+0xf
kernel: #3 0xffffffff8267154a at rtR0SemEventWait+0x2ba
kernel: #4 0xffffffff82650333 at SUPSemEventWaitNoResume+0x93
kernel: #5 0xffffffff82646c66 at supdrvIOCtlInnerUnrestricted+0x986
kernel: #6 0xffffffff826553fd at VBoxDrvFreeBSDIOCtl+0xed
kernel: #7 0xffffffff80a51acd at devfs_ioctl+0xad
kernel: #8 0xffffffff811f945e at VOP_IOCTL_APV+0x7e
kernel: #9 0xffffffff80c7a144 at vn_ioctl+0x1a4
kernel: #10 0xffffffff80a520af at devfs_ioctl_f+0x1f
kernel: #11 0xffffffff80c04f3d at kern_ioctl+0x26d
kernel: #12 0xffffffff80c04c5e at sys_ioctl+0x15e
kernel: #13 0xffffffff81075449 at amd64_syscall+0x369
kernel: #14 0xffffffff8104fd1d at fast_syscall_common+0x101
kernel: panic: sleeping thread
kernel: cpuid = 2
kernel: time = 1555196533
kernel: KDB: stack backtrace:
kernel: #0 0xffffffff80be7977 at kdb_backtrace+0x67
kernel: #1 0xffffffff80b9b563 at vpanic+0x1a3
kernel: #2 0xffffffff80b9b3b3 at panic+0x43
kernel: #3 0xffffffff80bfd412 at propagate_priority+0x2b2
kernel: #4 0xffffffff80bfe048 at turnstile_wait+0x338
kernel: #5 0xffffffff80b7ade6 at __mtx_lock_sleep+0x196
kernel: #6 0xffffffff80f013dc at vm_reserv_reclaim_inactive+0x9c
kernel: #7 0xffffffff80ef2db0 at vm_page_alloc_domain_after+0x210
kernel: #8 0xffffffff81075fac at uma_small_alloc+0x5c
kernel: #9 0xffffffff80ed71bc at keg_alloc_slab+0xdc
kernel: #10 0xffffffff80ed9e3c at keg_fetch_slab+0x19c
kernel: #11 0xffffffff80ed95b9 at zone_fetch_slab+0x69
kernel: #12 0xffffffff80ed96a1 at zone_import+0x51
kernel: #13 0xffffffff80ed5867 at uma_zalloc_arg+0x3e7
kernel: #14 0xffffffff82911a22 at abd_alloc+0x102
kernel: #15 0xffffffff829178ae at arc_hdr_alloc_pabd+0x8e
kernel: #16 0xffffffff829145df at arc_hdr_alloc+0x11f
kernel: #17 0xffffffff82916763 at arc_read+0x233
kernel: Uptime: 2m54s


kernel: Sleeping thread (tid 100916, pid 1205) owns a non-sleepable lock
kernel: KDB: stack backtrace of thread 100916:
kernel: #0 0xffffffff80ba6de1 at mi_switch+0xe1
kernel: #1 0xffffffff80bf5c45 at sleepq_catch_signals+0x405
kernel: #2 0xffffffff80bf578f at sleepq_wait_sig+0xf
kernel: #3 0xffffffff8267154a at rtR0SemEventWait+0x2ba
kernel: #4 0xffffffff82650333 at SUPSemEventWaitNoResume+0x93
kernel: #5 0xffffffff82646c66 at supdrvIOCtlInnerUnrestricted+0x986
kernel: #6 0xffffffff826553fd at VBoxDrvFreeBSDIOCtl+0xed
kernel: #7 0xffffffff80a51acd at devfs_ioctl+0xad
kernel: #8 0xffffffff811f945e at VOP_IOCTL_APV+0x7e
kernel: #9 0xffffffff80c7a144 at vn_ioctl+0x1a4
kernel: #10 0xffffffff80a520af at devfs_ioctl_f+0x1f
kernel: #11 0xffffffff80c04f3d at kern_ioctl+0x26d
kernel: #12 0xffffffff80c04c5e at sys_ioctl+0x15e
kernel: #13 0xffffffff81075449 at amd64_syscall+0x369
kernel: #14 0xffffffff8104fd1d at fast_syscall_common+0x101
kernel: panic: sleeping thread
kernel: cpuid = 4
kernel: time = 1555196306
kernel: KDB: stack backtrace:
kernel: #0 0xffffffff80be7977 at kdb_backtrace+0x67
kernel: #1 0xffffffff80b9b563 at vpanic+0x1a3
kernel: #2 0xffffffff80b9b3b3 at panic+0x43
kernel: #3 0xffffffff80bfd412 at propagate_priority+0x2b2
kernel: #4 0xffffffff80bfe048 at turnstile_wait+0x338
kernel: #5 0xffffffff80b7ade6 at __mtx_lock_sleep+0x196
kernel: #6 0xffffffff80f013dc at vm_reserv_reclaim_inactive+0x9c
kernel: #7 0xffffffff80ef2db0 at vm_page_alloc_domain_after+0x210
kernel: #8 0xffffffff81075fac at uma_small_alloc+0x5c
kernel: #9 0xffffffff80ed71bc at keg_alloc_slab+0xdc
kernel: #10 0xffffffff80ed9e3c at keg_fetch_slab+0x19c
kernel: #11 0xffffffff80ed95b9 at zone_fetch_slab+0x69
kernel: #12 0xffffffff80ed96a1 at zone_import+0x51
kernel: #13 0xffffffff80ed5867 at uma_zalloc_arg+0x3e7
kernel: #14 0xffffffff80c01fa4 at bt_fill+0x104
kernel: #15 0xffffffff80c016a5 at vmem_xalloc+0x1d5
kernel: #16 0xffffffff80c01491 at vmem_alloc+0x31
kernel: #17 0xffffffff80ee01d3 at kmem_malloc_domainset+0x83
kernel: Uptime: 55s