crash> bt/a ffffb79f9ce4ba40
trace: pid 4075 lid 1899 at 0xffff9480c32becd0
sleepq_block() at sleepq_block+0x14e
turnstile_block() at turnstile_block+0x310
mutex_vector_enter() at mutex_vector_enter+0x124
cv_timedwait_sig() at cv_timedwait_sig+0x55
audio_track_waitio() at audio_track_waitio+0x6d
audio_write.isra.0() at audio_write.isra.0+0x24e
audiowrite() at audiowrite+0x194
dofilewrite() at dofilewrite+0x80
sys_write() at sys_write+0x4b
syscall() at syscall+0x19e
--- syscall (number 4) ---
syscall+0x19e:
crash> bt/a ffffb7a080fe64c0
trace: pid 0 lid 6 at 0xffff9480ad368fa0
sleepq_block() at sleepq_block+0x14e
turnstile_block() at turnstile_block+0x310
mutex_vector_enter() at mutex_vector_enter+0x124
audio_softintr_wr() at audio_softintr_wr+0x1c
softint_dispatch() at softint_dispatch+0xf5
DDB lost frame for Xsoftintr+0x4f, trying 0xffff9480ad3690f0
Xsoftintr() at Xsoftintr+0x4f
--- interrupt ---
f546506f1a3d8e98:
crash> bt/a ffffb79fa89a0600
trace: pid 5470 lid 5745 at 0xffff9480c3accb40
sleepq_block() at sleepq_block+0x14e
cv_wait() at cv_wait+0x42
xc_wait() at xc_wait+0xb3
pserialize_perform() at pserialize_perform+0x59
module_hook_set() at module_hook_set+0x2f
hdaudioverbose_modcmd() at hdaudioverbose_modcmd+0x9e
module_do_load() at module_do_load+0x6bc
module_autoload() at module_autoload+0xf0
hdaudio_findvendor() at hdaudio_findvendor+0x81
hdafg_getdev() at hdafg_getdev+0x20
audioioctl() at audioioctl+0x934
sys_ioctl() at sys_ioctl+0x4d1
syscall() at syscall+0x19e
--- syscall (number 54) ---
syscall+0x19e: