Date: Wed, 17 Aug 2016 16:49:39 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-threads@FreeBSD.org Subject: [Bug 211947] bconsole won't die sitting on do_rw_wrlock Message-ID: <bug-211947-16@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211947 Bug ID: 211947 Summary: bconsole won't die sitting on do_rw_wrlock Product: Base System Version: 10.3-STABLE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: threads Assignee: freebsd-threads@FreeBSD.org Reporter: longwitz@incore.de I am running 10.3-STABLE FreeBSD 10.3-STABLE #3 r301633 und try to run bcon= sole from the port bacula5-client (P4Q4). Often after some bconsole commands the bconsole process can not die when entering "quit".=20 With kgdb running on /dev/mem I can see the process: (kgdb) info threads ... 191 Thread 100880 (PID=3D66009: bconsole) sched_switch (td=3D0xfffff8008= d64d4b0, newtd=3D<value optimized out>, flags=3D<value optimized out>) at /usr/src/sys/kern/sched_ule.c:1945 ... (kgdb) thread 191 [Switching to thread 191 (Thread 100880)]#0 sched_switch (td=3D0xfffff8008d64d4b0, newtd=3D<value optimized out>, flags=3D<value opt= imized out>) at /usr/src/sys/kern/sched_ule.c:1945 1945 cpuid =3D PCPU_GET(cpuid); (kgdb) bt #0 sched_switch (td=3D0xfffff8008d64d4b0, newtd=3D<value optimized out>, flags=3D<value optimized out>) at /usr/src/sys/kern/sched_ule.c:1945 #1 0xffffffff80664d41 in mi_switch (flags=3D260, newtd=3D0x0) at /usr/src/sys/kern/kern_synch.c:491 #2 0xffffffff806a87ab in sleepq_catch_signals (wchan=3D0xfffff8012a366f00, pri=3D0) at /usr/src/sys/kern/subr_sleepqueue.c:426 #3 0xffffffff806a865f in sleepq_wait_sig (wchan=3D0x0, pri=3D0) at /usr/src/sys/kern/subr_sleepqueue.c:632 #4 0xffffffff8066474d in _sleep (ident=3D<value optimized out>, lock=3D<va= lue optimized out>, priority=3D<value optimized out>, wmesg=3D<value optimized = out>, sbt=3D<value optimized out>, pr=3D<value optimized out>, flags=3D<value= optimized out>) at /usr/src/sys/kern/kern_synch.c:253 #5 0xffffffff80678d55 in umtxq_sleep (uq=3D0xfffff8012a366f00, wmesg=3D0xffffffff80a2583c "uwrlck", abstime=3D0x0) at /usr/src/sys/kern/kern_umtx.c:780 #6 0xffffffff8067c2ef in do_rw_wrlock (td=3D0xfffff8008d64d4b0, rwlock=3D0x802270880, timeout=3D<value optimized out>) at /usr/src/sys/kern/kern_umtx.c:3109 #7 0xffffffff8067ff77 in __umtx_op_rw_wrlock (td=3D<value optimized out>, uap=3D<value optimized out>) at /usr/src/sys/kern/kern_umtx.c:3657 #8 0xffffffff808edddf in amd64_syscall (td=3D0xfffff8008d64d4b0, traced=3D= 0) at subr_syscall.c:141 #9 0xffffffff808d29ab in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:398 kgdb) p *(struct thread *)0xfffff8008d64d4b0 $1 =3D {td_lock =3D 0xffffffff80e3d220, td_proc =3D 0xfffff800059a29e0, td_= plist =3D {tqe_next =3D 0x0, tqe_prev =3D 0xfffff800059a29f0}, td_runq =3D {tqe_next = =3D 0x0, tqe_prev =3D 0xffffffff80e07008}, td_slpq =3D {tqe_next =3D 0x0, tqe_pr= ev =3D 0xfffff800100d5980}, td_lockq =3D {tqe_next =3D 0x0, tqe_prev =3D 0xfffffe0231e18438}, td_hash =3D {le_next =3D 0x0, le_prev =3D 0xfffffe0000835080}, td_cpuset = =3D 0xfffff800042013a8, td_sel =3D 0xfffff801a28b2500, td_sleepqueue =3D 0x0, td_turnstile =3D 0xfffff80002fbd240, td_rlqe =3D 0xfffff800101aacf8, td_u= mtxq =3D 0xfffff8012a366f00, td_tid =3D 100880, td_sigqueue =3D {sq_signals =3D {__b= its =3D {0, 0, 0, 0}}, sq_kill =3D {__bits =3D {0, 0, 0, 0}}, sq_list =3D {tqh_fir= st =3D 0x0, tqh_last =3D 0xfffff8008d64d568}, sq_proc =3D 0xfffff800059a29e0, sq_flags = =3D 1}, td_lend_user_pri =3D 255 '=C3=BF', td_flags =3D 12, td_inhibitors =3D 2, = td_pflags =3D 0, td_dupfd =3D 0, td_sqqueue =3D 0, td_wchan =3D 0xfffff8012a366f00, td_wmesg =3D 0xffffffff80a2583c "uwrlck", td_lastcpu =3D 0 '\0', td_oncpu= =3D 255 '=C3=BF', td_owepreempt =3D 0 '\0', td_tsqueue =3D 0 '\0', td_locks =3D 399, td_rw_rlocks =3D 0, td_lk_slocks =3D 0, td_stopsched =3D 0, td_blocked = =3D 0x0, td_lockname =3D 0x0, td_contested =3D {lh_first =3D 0x0}, td_sleeplocks =3D= 0x0, td_intr_nesting_level =3D 0, td_pinned =3D 0, td_ucred =3D 0xfffff8004514= c700, td_estcpu =3D 0, td_slptick =3D 457002771, td_blktick =3D 0, td_swvoltick = =3D 457002771, td_cow =3D 104, td_ru =3D {ru_utime =3D {tv_sec =3D 0, tv_usec =3D 0}, ru= _stime =3D {tv_sec =3D 0, tv_usec =3D 0}, ru_maxrss =3D 6588, ru_ixrss =3D 252, ru_idr= ss =3D 28, ru_isrss =3D 896, ru_minflt =3D 325, ru_majflt =3D 0, ru_nswap =3D 0, r= u_inblock =3D 0, ru_oublock =3D 0, ru_msgsnd =3D 14, ru_msgrcv =3D 2353, ru_nsignals =3D = 0, ru_nvcsw =3D 121, ru_nivcsw =3D 9}, td_rux =3D {rux_runtime =3D 1515070= 80, rux_uticks =3D 5, rux_sticks =3D 2, rux_iticks =3D 0, rux_uu =3D 30135, rux= _su =3D 13070, rux_tu =3D 42189}, td_incruntime =3D 0, td_runtime =3D 151507080, td_pt= icks =3D 0, td_sticks =3D 0, td_iticks =3D 0, td_uticks =3D 0, td_intrval =3D 0, td_old= sigmask =3D { __bits =3D {0, 0, 0, 0}}, td_generation =3D 130, td_sigstk =3D {ss_sp = =3D 0x0, ss_size =3D 0, ss_flags =3D 4}, td_xsig =3D 0, td_profil_addr =3D 0, td_pro= fil_ticks =3D 0, td_name =3D "bconsole", '\0' <repeats 11 times>, td_fpop =3D 0x0, td_dbgf= lags =3D 0, td_dbgksi =3D {ksi_link =3D {tqe_next =3D 0x0, tqe_prev =3D 0x0}, ksi_in= fo =3D { si_signo =3D 0, si_errno =3D 0, si_code =3D 0, si_pid =3D 0, si_uid = =3D 0, si_status =3D 0, si_addr =3D 0x0, si_value =3D {sival_int =3D 0, sival_ptr = =3D 0x0, sigval_int =3D 0, sigval_ptr =3D 0x0}, _reason =3D {_fault =3D {_trapno =3D 0}, _time= r =3D {_timerid =3D 0, _overrun =3D 0}, _mesgq =3D {_mqd =3D 0}, _poll =3D {_band= =3D 0}, __spare__ =3D { __spare1__ =3D 0, __spare2__ =3D {0, 0, 0, 0, 0, 0, 0}}}}, ksi_fl= ags =3D 0, ksi_sigq =3D 0x0}, td_ng_outbound =3D 0, td_osd =3D {osd_nslots =3D 0, osd_= slots =3D 0x0, osd_next =3D {le_next =3D 0x0, le_prev =3D 0x0}}, td_map_def_user =3D 0= x0, td_dbg_forked =3D 0, td_vp_reserv =3D 0, td_no_sleeping =3D 0, td_dom_rr_id= x =3D 0, td_sigmask =3D { __bits =3D {0, 0, 0, 0}}, td_rqindex =3D 30 '\036', td_base_pri =3D 120= 'x', td_priority =3D 120 'x', td_pri_class =3D 3 '\003', td_user_pri =3D 120 'x', td_base_user_pri =3D 120 'x', td_pcb =3D 0xfffffe0231f2bcc0, td_state =3D TDS_INHIBITED, td_retval =3D {0, 0}, td_slpcallout =3D {c_links =3D {le =3D= { le_next =3D 0xfffffe00007eb2c0, le_prev =3D 0xfffffe0000801de8}, sl= e =3D {sle_next =3D 0xfffffe00007eb2c0}, tqe =3D {tqe_next =3D 0xfffffe00007eb2c0, tqe_prev =3D 0xfffffe0000801de8}}, c_time =3D 1962816112194023, c_p= recision =3D 26843, c_arg =3D 0xfffff8008d64d4b0, c_func =3D 0xffffffff806a8220 <sleepq_timeout>, c_lock =3D 0x0, c_flags= =3D 2, c_iflags =3D 272, c_cpu =3D 0}, td_frame =3D 0xfffffe0231f2bc00, td_kstack_obj =3D 0xfffff8013d46ea00, td_kstack =3D 18446741884114206720, td_kstack_pages =3D 4, td_critnest =3D 1, td_md =3D {md_spinlock_count =3D = 1, md_saved_flags =3D 582, md_spurflt_addr =3D 34414718976}, td_sched =3D 0xfffff8008d64d930, td_ar =3D 0x0, td_lprof =3D {{lh_first =3D 0x0}, {lh_fi= rst =3D 0x0}}, td_dtrace =3D 0xfffff8003e02d000, td_errno =3D 0, td_vnet =3D 0x0, td_vne= t_lpush =3D 0x0, td_intr_frame =3D 0x0, td_rfppwait_p =3D 0xfffff801a2d224f0, td_ma =3D= 0x0, td_ma_cnt =3D 0, td_su =3D 0x0, td_dbg_sc_code =3D 0, td_dbg_sc_narg =3D = 0, td_emuldata =3D 0x0} (kgdb) p *(struct proc *)0xfffff800059a29e0 $2 =3D {p_list =3D {le_next =3D 0xfffff80010d209e0, le_prev =3D 0xfffff8000= 556c000}, p_threads =3D {tqh_first =3D 0xfffff8008d64d4b0, tqh_last =3D 0xfffff8008d6= 4d4c0}, p_slock =3D {lock_object =3D {lo_name =3D 0xffffffff80a22eb0 "process slo= ck", lo_flags =3D 720896, lo_data =3D 0, lo_witness =3D 0x0}, mtx_lock =3D 4}, p_ucred =3D 0xfffff8004514c700, p_fd =3D 0xfffff801d97ba800, p_fdtol =3D = 0x0, p_stats =3D 0xfffff80005889800, p_limit =3D 0xfffff800055cc800, p_limco =3D= {c_links =3D { le =3D {le_next =3D 0x0, le_prev =3D 0x0}, sle =3D {sle_next =3D 0x0}= , tqe =3D {tqe_next =3D 0x0, tqe_prev =3D 0x0}}, c_time =3D 0, c_precision =3D 0, c_a= rg =3D 0x0, c_func =3D 0, c_lock =3D 0xfffff800059a2ae0, c_flags =3D 0, c_iflags = =3D 0, c_cpu =3D 0}, p_sigacts =3D 0xfffff801a1ce4000, p_flag =3D 268451970, p_flag2 =3D 0, p_state =3D PRS_NORMAL, p_pid =3D 66009, p_hash =3D {le_next =3D 0x0, le_= prev =3D 0xfffffe00006beec8}, p_pglist =3D {le_next =3D 0x0, le_prev =3D 0xfffff8011= 2b3df10}, p_pptr =3D 0xfffff801a2e549e0, p_sibling =3D {le_next =3D 0x0, le_prev =3D 0xfffff801a2e54ad8}, p_children =3D {lh_first =3D 0x0}, p_mtx =3D {lock_obj= ect =3D { lo_name =3D 0xffffffff80a22ea3 "process lock", lo_flags =3D 21168128,= lo_data =3D 0, lo_witness =3D 0x0}, mtx_lock =3D 4}, p_ksi =3D 0xfffff80004e76620, = p_sigqueue =3D { sq_signals =3D {__bits =3D {0, 0, 0, 0}}, sq_kill =3D {__bits =3D {0, 0= , 0, 0}}, sq_list =3D {tqh_first =3D 0x0, tqh_last =3D 0xfffff800059a2b28}, sq_proc =3D 0xfffff800059a29e0, sq_flags =3D 1}, p_oppid =3D 0, p_vmspa= ce =3D 0xfffff8001032cc40, p_swtick =3D 456987934, p_realtimer =3D {it_interval = =3D {tv_sec =3D 0, tv_usec =3D 0}, it_value =3D {tv_sec =3D 0, tv_usec =3D 0}}, p_ru =3D= {ru_utime =3D {tv_sec =3D 0, tv_usec =3D 0}, ru_stime =3D {tv_sec =3D 0, tv_usec =3D 0}, = ru_maxrss =3D 0, ru_ixrss =3D 0, ru_idrss =3D 0, ru_isrss =3D 0, ru_minflt =3D 40, ru_ma= jflt =3D 0, ru_nswap =3D 0, ru_inblock =3D 0, ru_oublock =3D 0, ru_msgsnd =3D 0, ru_msg= rcv =3D 0, ru_nsignals =3D 1, ru_nvcsw =3D 7, ru_nivcsw =3D 0}, p_rux =3D {rux_run= time =3D 155793645, rux_uticks =3D 5, rux_sticks =3D 2, rux_iticks =3D 0, rux_uu =3D= 30987, rux_su =3D 13289, rux_tu =3D 43383}, p_crux =3D {rux_runtime =3D 0, rux= _uticks =3D 0, rux_sticks =3D 0, rux_iticks =3D 0, rux_uu =3D 0, rux_su =3D 0, rux_tu =3D = 0}, p_profthreads =3D 0, p_exitthreads =3D 0, p_traceflag =3D 0, p_tracevp = =3D 0x0, p_tracecred =3D 0x0, p_textvp =3D 0xfffff8019c7bb588, p_lock =3D 0, p_sigio= lst =3D { slh_first =3D 0x0}, p_sigparent =3D 20, p_sig =3D 0, p_code =3D 0, p_st= ops =3D 0, p_stype =3D 0, p_step =3D 0 '\0', p_pfsflags =3D 0 '\0', p_nlminfo =3D 0x0,= p_aioinfo =3D 0x0, p_singlethread =3D 0x0, p_suspcount =3D 0, p_xthread =3D 0x0, p_boundary_= count =3D 0, p_pendingcnt =3D 0, p_itimers =3D 0x0, p_procdesc =3D 0x0, p_magic =3D 3203= 398350, p_osrel =3D 1003500, p_comm =3D "bconsole", '\0' <repeats 11 times>, p_pa= d0 =3D 0x0, p_sysent =3D 0xffffffff80d18db8, p_args =3D 0xfffff801a294b720, p_cpulimit =3D 9223372036854775807, p_nice =3D 0 '\0', p_fibnum =3D 0, p_= xstat =3D 0, p_klist =3D {kl_list =3D {slh_first =3D 0x0}, kl_lock =3D 0xffffffff80620190 <knlist_mtx_lock>, kl_unlock =3D 0xffffffff806201d0 <knlist_mtx_unlock>, kl_assert_locked =3D 0xffffffff80620210 <knlist_mtx_assert_locked>, kl_assert_unlocked =3D 0xffffffff80620220 <knlist_mtx_assert_unlocked>, kl_lockarg =3D 0xfffff800059a2ae0}, p_numthreads =3D 1, p_md =3D {md_ld= t =3D 0x0, md_ldt_sd =3D {sd_lolimit =3D 0, sd_lobase =3D 0, sd_type =3D 0, sd_dpl =3D= 0, sd_p =3D 0, sd_hilimit =3D 0, sd_xx0 =3D 0, sd_gran =3D 0, sd_hibase =3D 0, sd_xx= 1 =3D 0, sd_mbz =3D 0, sd_xx2 =3D 0}}, p_itcallout =3D {c_links =3D {le =3D {le_next= =3D 0x0, le_prev =3D 0x0}, sle =3D {sle_next =3D 0x0}, tqe =3D {tqe_next =3D= 0x0, tqe_prev =3D 0x0}}, c_time =3D 0, c_precision =3D 0, c_arg =3D 0x0, c_func =3D 0, c_lock =3D 0xfffff800059a2ae0, c_flags =3D 0, c_iflags =3D 0, c_cpu =3D= 0}, p_acflag =3D 0, p_peers =3D 0x0, p_leader =3D 0xfffff800059a29e0, p_emuldat= a =3D 0x0, p_label =3D 0x0, p_sched =3D 0xfffff800059a2ed0, p_ktr =3D {stqh_first = =3D 0x0, stqh_last =3D 0xfffff800059a2e28}, p_mqnotifier =3D {lh_first =3D 0x0}, p_dtrace =3D 0xfffff801d965f280, p_pwait =3D {cv_description =3D 0xffffff= ff80a239ab "ppwait", cv_waiters =3D 0}, p_dbgwait =3D { cv_description =3D 0xffffffff80a239b2 "dbgwait", cv_waiters =3D 0}, p_prev_runtime =3D 0, p_racct =3D 0x0, p_throttled =3D 0 '\0', p_orphan =3D= {le_next =3D 0x0, le_prev =3D 0x0}, p_orphans =3D {lh_first =3D 0x0}, p_treeflag =3D 0, p= _reaper =3D 0xfffff800042104f0, p_reaplist =3D {lh_first =3D 0x0}, p_reapsibling =3D { le_next =3D 0xfffff80010d209e0, le_prev =3D 0xfffff8000556c4d0}, p_reap= subtree =3D 29, p_pgrp =3D 0xfffff80112b3df00} The software has run without this problem for years on FreeBSD 8.4-STABLE. --=20 You are receiving this mail because: You are the assignee for the bug.=
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