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=211947 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 bconsole from the port bacula5-client (P4Q4). Often after some bconsole commands the bconsole process can not die when entering "quit". With kgdb running on /dev/mem I can see the process: (kgdb) info threads ... 191 Thread 100880 (PID=66009: bconsole) sched_switch (td=0xfffff8008d64d4b0, newtd=<value optimized out>, flags=<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=0xfffff8008d64d4b0, newtd=<value optimized out>, flags=<value optimized out>) at /usr/src/sys/kern/sched_ule.c:1945 1945 cpuid = PCPU_GET(cpuid); (kgdb) bt #0 sched_switch (td=0xfffff8008d64d4b0, newtd=<value optimized out>, flags=<value optimized out>) at /usr/src/sys/kern/sched_ule.c:1945 #1 0xffffffff80664d41 in mi_switch (flags=260, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:491 #2 0xffffffff806a87ab in sleepq_catch_signals (wchan=0xfffff8012a366f00, pri=0) at /usr/src/sys/kern/subr_sleepqueue.c:426 #3 0xffffffff806a865f in sleepq_wait_sig (wchan=0x0, pri=0) at /usr/src/sys/kern/subr_sleepqueue.c:632 #4 0xffffffff8066474d in _sleep (ident=<value optimized out>, lock=<value optimized out>, priority=<value optimized out>, wmesg=<value optimized out>, sbt=<value optimized out>, pr=<value optimized out>, flags=<value optimized out>) at /usr/src/sys/kern/kern_synch.c:253 #5 0xffffffff80678d55 in umtxq_sleep (uq=0xfffff8012a366f00, wmesg=0xffffffff80a2583c "uwrlck", abstime=0x0) at /usr/src/sys/kern/kern_umtx.c:780 #6 0xffffffff8067c2ef in do_rw_wrlock (td=0xfffff8008d64d4b0, rwlock=0x802270880, timeout=<value optimized out>) at /usr/src/sys/kern/kern_umtx.c:3109 #7 0xffffffff8067ff77 in __umtx_op_rw_wrlock (td=<value optimized out>, uap=<value optimized out>) at /usr/src/sys/kern/kern_umtx.c:3657 #8 0xffffffff808edddf in amd64_syscall (td=0xfffff8008d64d4b0, traced=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 = {td_lock = 0xffffffff80e3d220, td_proc = 0xfffff800059a29e0, td_plist = {tqe_next = 0x0, tqe_prev = 0xfffff800059a29f0}, td_runq = {tqe_next = 0x0, tqe_prev = 0xffffffff80e07008}, td_slpq = {tqe_next = 0x0, tqe_prev = 0xfffff800100d5980}, td_lockq = {tqe_next = 0x0, tqe_prev = 0xfffffe0231e18438}, td_hash = {le_next = 0x0, le_prev = 0xfffffe0000835080}, td_cpuset = 0xfffff800042013a8, td_sel = 0xfffff801a28b2500, td_sleepqueue = 0x0, td_turnstile = 0xfffff80002fbd240, td_rlqe = 0xfffff800101aacf8, td_umtxq = 0xfffff8012a366f00, td_tid = 100880, td_sigqueue = {sq_signals = {__bits = {0, 0, 0, 0}}, sq_kill = {__bits = {0, 0, 0, 0}}, sq_list = {tqh_first = 0x0, tqh_last = 0xfffff8008d64d568}, sq_proc = 0xfffff800059a29e0, sq_flags = 1}, td_lend_user_pri = 255 'ÿ', td_flags = 12, td_inhibitors = 2, td_pflags = 0, td_dupfd = 0, td_sqqueue = 0, td_wchan = 0xfffff8012a366f00, td_wmesg = 0xffffffff80a2583c "uwrlck", td_lastcpu = 0 '\0', td_oncpu = 255 'ÿ', td_owepreempt = 0 '\0', td_tsqueue = 0 '\0', td_locks = 399, td_rw_rlocks = 0, td_lk_slocks = 0, td_stopsched = 0, td_blocked = 0x0, td_lockname = 0x0, td_contested = {lh_first = 0x0}, td_sleeplocks = 0x0, td_intr_nesting_level = 0, td_pinned = 0, td_ucred = 0xfffff8004514c700, td_estcpu = 0, td_slptick = 457002771, td_blktick = 0, td_swvoltick = 457002771, td_cow = 104, td_ru = {ru_utime = {tv_sec = 0, tv_usec = 0}, ru_stime = {tv_sec = 0, tv_usec = 0}, ru_maxrss = 6588, ru_ixrss = 252, ru_idrss = 28, ru_isrss = 896, ru_minflt = 325, ru_majflt = 0, ru_nswap = 0, ru_inblock = 0, ru_oublock = 0, ru_msgsnd = 14, ru_msgrcv = 2353, ru_nsignals = 0, ru_nvcsw = 121, ru_nivcsw = 9}, td_rux = {rux_runtime = 151507080, rux_uticks = 5, rux_sticks = 2, rux_iticks = 0, rux_uu = 30135, rux_su = 13070, rux_tu = 42189}, td_incruntime = 0, td_runtime = 151507080, td_pticks = 0, td_sticks = 0, td_iticks = 0, td_uticks = 0, td_intrval = 0, td_oldsigmask = { __bits = {0, 0, 0, 0}}, td_generation = 130, td_sigstk = {ss_sp = 0x0, ss_size = 0, ss_flags = 4}, td_xsig = 0, td_profil_addr = 0, td_profil_ticks = 0, td_name = "bconsole", '\0' <repeats 11 times>, td_fpop = 0x0, td_dbgflags = 0, td_dbgksi = {ksi_link = {tqe_next = 0x0, tqe_prev = 0x0}, ksi_info = { si_signo = 0, si_errno = 0, si_code = 0, si_pid = 0, si_uid = 0, si_status = 0, si_addr = 0x0, si_value = {sival_int = 0, sival_ptr = 0x0, sigval_int = 0, sigval_ptr = 0x0}, _reason = {_fault = {_trapno = 0}, _timer = {_timerid = 0, _overrun = 0}, _mesgq = {_mqd = 0}, _poll = {_band = 0}, __spare__ = { __spare1__ = 0, __spare2__ = {0, 0, 0, 0, 0, 0, 0}}}}, ksi_flags = 0, ksi_sigq = 0x0}, td_ng_outbound = 0, td_osd = {osd_nslots = 0, osd_slots = 0x0, osd_next = {le_next = 0x0, le_prev = 0x0}}, td_map_def_user = 0x0, td_dbg_forked = 0, td_vp_reserv = 0, td_no_sleeping = 0, td_dom_rr_idx = 0, td_sigmask = { __bits = {0, 0, 0, 0}}, td_rqindex = 30 '\036', td_base_pri = 120 'x', td_priority = 120 'x', td_pri_class = 3 '\003', td_user_pri = 120 'x', td_base_user_pri = 120 'x', td_pcb = 0xfffffe0231f2bcc0, td_state = TDS_INHIBITED, td_retval = {0, 0}, td_slpcallout = {c_links = {le = { le_next = 0xfffffe00007eb2c0, le_prev = 0xfffffe0000801de8}, sle = {sle_next = 0xfffffe00007eb2c0}, tqe = {tqe_next = 0xfffffe00007eb2c0, tqe_prev = 0xfffffe0000801de8}}, c_time = 1962816112194023, c_precision = 26843, c_arg = 0xfffff8008d64d4b0, c_func = 0xffffffff806a8220 <sleepq_timeout>, c_lock = 0x0, c_flags = 2, c_iflags = 272, c_cpu = 0}, td_frame = 0xfffffe0231f2bc00, td_kstack_obj = 0xfffff8013d46ea00, td_kstack = 18446741884114206720, td_kstack_pages = 4, td_critnest = 1, td_md = {md_spinlock_count = 1, md_saved_flags = 582, md_spurflt_addr = 34414718976}, td_sched = 0xfffff8008d64d930, td_ar = 0x0, td_lprof = {{lh_first = 0x0}, {lh_first = 0x0}}, td_dtrace = 0xfffff8003e02d000, td_errno = 0, td_vnet = 0x0, td_vnet_lpush = 0x0, td_intr_frame = 0x0, td_rfppwait_p = 0xfffff801a2d224f0, td_ma = 0x0, td_ma_cnt = 0, td_su = 0x0, td_dbg_sc_code = 0, td_dbg_sc_narg = 0, td_emuldata = 0x0} (kgdb) p *(struct proc *)0xfffff800059a29e0 $2 = {p_list = {le_next = 0xfffff80010d209e0, le_prev = 0xfffff8000556c000}, p_threads = {tqh_first = 0xfffff8008d64d4b0, tqh_last = 0xfffff8008d64d4c0}, p_slock = {lock_object = {lo_name = 0xffffffff80a22eb0 "process slock", lo_flags = 720896, lo_data = 0, lo_witness = 0x0}, mtx_lock = 4}, p_ucred = 0xfffff8004514c700, p_fd = 0xfffff801d97ba800, p_fdtol = 0x0, p_stats = 0xfffff80005889800, p_limit = 0xfffff800055cc800, p_limco = {c_links = { le = {le_next = 0x0, le_prev = 0x0}, sle = {sle_next = 0x0}, tqe = {tqe_next = 0x0, tqe_prev = 0x0}}, c_time = 0, c_precision = 0, c_arg = 0x0, c_func = 0, c_lock = 0xfffff800059a2ae0, c_flags = 0, c_iflags = 0, c_cpu = 0}, p_sigacts = 0xfffff801a1ce4000, p_flag = 268451970, p_flag2 = 0, p_state = PRS_NORMAL, p_pid = 66009, p_hash = {le_next = 0x0, le_prev = 0xfffffe00006beec8}, p_pglist = {le_next = 0x0, le_prev = 0xfffff80112b3df10}, p_pptr = 0xfffff801a2e549e0, p_sibling = {le_next = 0x0, le_prev = 0xfffff801a2e54ad8}, p_children = {lh_first = 0x0}, p_mtx = {lock_object = { lo_name = 0xffffffff80a22ea3 "process lock", lo_flags = 21168128, lo_data = 0, lo_witness = 0x0}, mtx_lock = 4}, p_ksi = 0xfffff80004e76620, p_sigqueue = { sq_signals = {__bits = {0, 0, 0, 0}}, sq_kill = {__bits = {0, 0, 0, 0}}, sq_list = {tqh_first = 0x0, tqh_last = 0xfffff800059a2b28}, sq_proc = 0xfffff800059a29e0, sq_flags = 1}, p_oppid = 0, p_vmspace = 0xfffff8001032cc40, p_swtick = 456987934, p_realtimer = {it_interval = {tv_sec = 0, tv_usec = 0}, it_value = {tv_sec = 0, tv_usec = 0}}, p_ru = {ru_utime = {tv_sec = 0, tv_usec = 0}, ru_stime = {tv_sec = 0, tv_usec = 0}, ru_maxrss = 0, ru_ixrss = 0, ru_idrss = 0, ru_isrss = 0, ru_minflt = 40, ru_majflt = 0, ru_nswap = 0, ru_inblock = 0, ru_oublock = 0, ru_msgsnd = 0, ru_msgrcv = 0, ru_nsignals = 1, ru_nvcsw = 7, ru_nivcsw = 0}, p_rux = {rux_runtime = 155793645, rux_uticks = 5, rux_sticks = 2, rux_iticks = 0, rux_uu = 30987, rux_su = 13289, rux_tu = 43383}, p_crux = {rux_runtime = 0, rux_uticks = 0, rux_sticks = 0, rux_iticks = 0, rux_uu = 0, rux_su = 0, rux_tu = 0}, p_profthreads = 0, p_exitthreads = 0, p_traceflag = 0, p_tracevp = 0x0, p_tracecred = 0x0, p_textvp = 0xfffff8019c7bb588, p_lock = 0, p_sigiolst = { slh_first = 0x0}, p_sigparent = 20, p_sig = 0, p_code = 0, p_stops = 0, p_stype = 0, p_step = 0 '\0', p_pfsflags = 0 '\0', p_nlminfo = 0x0, p_aioinfo = 0x0, p_singlethread = 0x0, p_suspcount = 0, p_xthread = 0x0, p_boundary_count = 0, p_pendingcnt = 0, p_itimers = 0x0, p_procdesc = 0x0, p_magic = 3203398350, p_osrel = 1003500, p_comm = "bconsole", '\0' <repeats 11 times>, p_pad0 = 0x0, p_sysent = 0xffffffff80d18db8, p_args = 0xfffff801a294b720, p_cpulimit = 9223372036854775807, p_nice = 0 '\0', p_fibnum = 0, p_xstat = 0, p_klist = {kl_list = {slh_first = 0x0}, kl_lock = 0xffffffff80620190 <knlist_mtx_lock>, kl_unlock = 0xffffffff806201d0 <knlist_mtx_unlock>, kl_assert_locked = 0xffffffff80620210 <knlist_mtx_assert_locked>, kl_assert_unlocked = 0xffffffff80620220 <knlist_mtx_assert_unlocked>, kl_lockarg = 0xfffff800059a2ae0}, p_numthreads = 1, p_md = {md_ldt = 0x0, md_ldt_sd = {sd_lolimit = 0, sd_lobase = 0, sd_type = 0, sd_dpl = 0, sd_p = 0, sd_hilimit = 0, sd_xx0 = 0, sd_gran = 0, sd_hibase = 0, sd_xx1 = 0, sd_mbz = 0, sd_xx2 = 0}}, p_itcallout = {c_links = {le = {le_next = 0x0, le_prev = 0x0}, sle = {sle_next = 0x0}, tqe = {tqe_next = 0x0, tqe_prev = 0x0}}, c_time = 0, c_precision = 0, c_arg = 0x0, c_func = 0, c_lock = 0xfffff800059a2ae0, c_flags = 0, c_iflags = 0, c_cpu = 0}, p_acflag = 0, p_peers = 0x0, p_leader = 0xfffff800059a29e0, p_emuldata = 0x0, p_label = 0x0, p_sched = 0xfffff800059a2ed0, p_ktr = {stqh_first = 0x0, stqh_last = 0xfffff800059a2e28}, p_mqnotifier = {lh_first = 0x0}, p_dtrace = 0xfffff801d965f280, p_pwait = {cv_description = 0xffffffff80a239ab "ppwait", cv_waiters = 0}, p_dbgwait = { cv_description = 0xffffffff80a239b2 "dbgwait", cv_waiters = 0}, p_prev_runtime = 0, p_racct = 0x0, p_throttled = 0 '\0', p_orphan = {le_next = 0x0, le_prev = 0x0}, p_orphans = {lh_first = 0x0}, p_treeflag = 0, p_reaper = 0xfffff800042104f0, p_reaplist = {lh_first = 0x0}, p_reapsibling = { le_next = 0xfffff80010d209e0, le_prev = 0xfffff8000556c4d0}, p_reapsubtree = 29, p_pgrp = 0xfffff80112b3df00} The software has run without this problem for years on FreeBSD 8.4-STABLE. -- You are receiving this mail because: You are the assignee for the bug.help
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