[Bug 204178] stress2 on arm64 thr1 hangs after printing pthread_join error
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Thu Nov 26 12:36:33 UTC 2015
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=204178
--- Comment #1 from Andrew Turner <Andrew at FreeBSD.org> ---
I'm not sure if the message is related to the hang. I've seen each independent
of each other.
It seems the process is stuck in the kernel waiting on a mutex:
# pprocstat -t 19405
PID TID COMM TDNAME CPU PRI STATE WCHAN
19405 100607 thr1 - -1 120 sleep umtxn
19405 101334 thr1 - -1 152 sleep umtxn
# procstat -k 19405
PID TID COMM TDNAME KSTACK
19405 100607 thr1 - mi_switch sleepq_catch_signals
sleepq_wait_sig _sleep umtxq_sleep do_lock_umutex __umtx_op_wait_umutex
do_el0_sync
19405 101334 thr1 - mi_switch sleepq_catch_signals
sleepq_wait_sig _sleep umtxq_sleep do_lock_umutex __umtx_op_wait_umutex
do_el0_sync
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