nmi_calltrap in siopoll()
pluknet
pluknet at gmail.com
Tue Feb 2 16:44:03 UTC 2010
Hi.
I've got NMI on an almost idle system - FreeBSD 7.2-R amd64.
I guess the reason may be in (hardware?) binary garbage
seen once in a while on serial port (loader, then ttyd0).
Ask me for more details.
Tracing command swi4: clock sio pid 20 tid 100011 td 0xffffff000144e370
cpustop_handler() at cpustop_handler+64
ipi_nmi_handler() at ipi_nmi_handler+48
trap() at trap+796
nmi_calltrap() at nmi_calltrap+8
--- trap 19, rip = 18446744071567390785, rsp = 18446744067267268592,
rbp = 18446744067267558272 ---
_mtx_lock_spin() at _mtx_lock_spin+113
siopoll() at siopoll+206
ithread_loop() at ithread_loop+384
fork_exit() at fork_exit+287
fork_trampoline() at fork_trampoline+14
--- trap 0, rip = 0, rsp = 18446744067267558704, rbp = 0 ---
(kgdb) thr 13
[Switching to thread 13 (Thread 100011)]#0 cpustop_handler () at atomic.h:264
264 atomic.h: No such file or directory.
in atomic.h
(kgdb) bt
#0 cpustop_handler () at atomic.h:264
#1 0xffffffff807ec400 in ipi_nmi_handler ()
at /usr/src/sys/amd64/amd64/mp_machdep.c:1144
#2 0xffffffff807fceec in trap (frame=0xfffffffe80028f40)
at /usr/src/sys/amd64/amd64/trap.c:198
#3 0xffffffff807e0aeb in nmi_calltrap ()
at /usr/src/sys/amd64/amd64/exception.S:427
#4 0xffffffff80513841 in _mtx_lock_spin (m=0xffffffff80bb3d00,
tid=18446742974219215728, opts=Variable "opts" is not available.
) at /usr/src/sys/kern/kern_mutex.c:474
#5 0xffffffff8082b96e in siopoll (dummy=Variable "dummy" is not available.
) at /usr/src/sys/dev/sio/sio.c:1703
#6 0xffffffff804ff940 in ithread_loop (arg=0xffffff000142bac0)
at /usr/src/sys/kern/kern_intr.c:1088
#7 0xffffffff804fc1df in fork_exit (
callout=0xffffffff804ff7c0 <ithread_loop>, arg=0xffffff000142bac0,
frame=0xfffffffe8006fc80) at /usr/src/sys/kern/kern_fork.c:834
#8 0xffffffff807e0b5e in fork_trampoline ()
at /usr/src/sys/amd64/amd64/exception.S:455
#9 0x0000000000000000 in ?? ()
#10 0x0000000000000000 in ?? ()
#11 0x0000000000000001 in ?? ()
#12 0x0000000000000000 in ?? ()
#13 0x0000000000000000 in ?? ()
#14 0x0000000000000000 in ?? ()
---Type <return> to continue, or q <return> to quit---q
Quit
(kgdb) f 5
#5 0xffffffff8082b96e in siopoll (dummy=Variable "dummy" is not available.
) at /usr/src/sys/dev/sio/sio.c:1703
1703 mtx_lock_spin(&sio_lock);
(kgdb) i loc
_tid = Variable "_tid" is not available.
(kgdb) list
1698 com_events -= incc;
1699 mtx_unlock_spin(&sio_lock);
1700 continue;
1701 }
1702 if (com->iptr != com->ibuf) {
1703 mtx_lock_spin(&sio_lock);
1704 sioinput(com);
1705 mtx_unlock_spin(&sio_lock);
1706 }
1707 if (com->state & CS_CHECKMSR) {
(kgdb) p sio_lock
$1 = {lock_object = {lo_name = 0xffffffff80b15380 "sio",
lo_type = 0xffffffff80b15380 "sio", lo_flags = 458752, lo_witness_data = {
lod_list = {stqe_next = 0x0}, lod_witness = 0x0}},
mtx_lock = 18446742974219094608, mtx_recurse = 0}
(kgdb) p/x sio_lock->mtx_lock
$10 = 0xffffff0001430a50 # == td for pid 17 tid 100008
Binary garbage is like below (not touching anything on k/board atm).
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[..a little later..]
[root at host ~]# <<<<<<<<<<<><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<8<<<<<8<<<<
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<8<<<<<<<><
Other useful stuff.
(kgdb) f 4
#4 0xffffffff80513841 in _mtx_lock_spin (m=0xffffffff80bb3d00,
tid=18446742974219215728, opts=Variable "opts" is not available.
) at /usr/src/sys/kern/kern_mutex.c:474
474 while (m->mtx_lock != MTX_UNOWNED) {
(kgdb) list
469 lock_profile_obtain_lock_failed(&m->lock_object,
&contested, &waittime);
470 while (!_obtain_lock(m, tid)) {
471
472 /* Give interrupts a chance while we spin. */
473 spinlock_exit();
474 while (m->mtx_lock != MTX_UNOWNED) {
475 if (i++ < 10000000) {
476 cpu_spinwait();
477 continue;
478 }
(kgdb) f 3
#3 0xffffffff807e0aeb in nmi_calltrap ()
at /usr/src/sys/amd64/amd64/exception.S:427
427 call trap
Current language: auto; currently asm
(kgdb) list
422 swapgs
423 /* Note: this label is also used by ddb and gdb: */
424 nmi_calltrap:
425 FAKE_MCOUNT(TF_RIP(%rsp))
426 movq %rsp, %rdi
427 call trap
428 MEXITCOUNT
429 testl %ebx,%ebx
430 jz nmi_restoreregs
431 swapgs
(kgdb) f 2
#2 0xffffffff807fceec in trap (frame=0xfffffffe80028f40)
at /usr/src/sys/amd64/amd64/trap.c:198
198 if (ipi_nmi_handler() == 0)
Current language: auto; currently c
(kgdb) list
193
194 #ifdef SMP
195 #ifdef STOP_NMI
196 /* Handler for NMI IPIs used for stopping CPUs. */
197 if (type == T_NMI) {
198 if (ipi_nmi_handler() == 0)
199 goto out;
200 }
201 #endif /* STOP_NMI */
202 #endif /* SMP */
db> bt
Tracing pid 17 tid 100008 td 0xffffff0001430a50
kdb_enter_why() at kdb_enter_why+0x3d
siointr1() at siointr1+0x2c5
siointr() at siointr+0x58
intr_execute_handlers() at intr_execute_handlers+0x8b
Xapic_isr1() at Xapic_isr1+0x7f
--- interrupt, rip = 0xffffffff807d8bd6, rsp = 0xfffffffe8005fb90, rbp
= 0xfffffffe8005fba0 ---
acpi_cpu_c1() at acpi_cpu_c1+0x6
acpi_cpu_idle() at acpi_cpu_idle+0x19c
sched_idletd() at sched_idletd+0x46
fork_exit() at fork_exit+0x11f
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xfffffffe8005fd30, rbp = 0 ---
(kgdb) p (struct thread) *sio_lock->mtx_lock
$15 = {td_lock = 0xffffffff80b7bc40, td_proc = 0xffffff000142e478, td_plist = {
tqe_next = 0x0, tqe_prev = 0xffffff000142e488}, td_slpq = {tqe_next = 0x0,
tqe_prev = 0x0}, td_lockq = {tqe_next = 0x0, tqe_prev = 0x0}, td_selq = {
tqh_first = 0x0, tqh_last = 0x0}, td_sleepqueue = 0xffffff0001418c00,
td_turnstile = 0xffffff00012f9a00, td_umtxq = 0xffffff000142a380,
td_tid = 100008, td_sigqueue = {sq_signals = {__bits = {0, 0, 0, 0}},
sq_kill = {__bits = {0, 0, 0, 0}}, sq_list = {tqh_first = 0x0,
tqh_last = 0xffffff0001430ae0}, sq_proc = 0xffffff000142e478,
sq_flags = 1}, td_flags = 65572, td_inhibitors = 0, td_pflags = 0,
td_dupfd = 0, td_sqqueue = 0, td_wchan = 0x0, td_wmesg = 0x0,
td_lastcpu = 1 '\001', td_oncpu = 1 '\001', td_owepreempt = 0 '\0',
td_locks = 0, td_tsqueue = 0 '\0', td_blocked = 0x0, td_lockname = 0x0,
td_contested = {lh_first = 0x0}, td_sleeplocks = 0x0,
td_intr_nesting_level = 1, td_pinned = 0, td_mailbox = 0x0,
td_ucred = 0xffffff0001300e00, td_standin = 0x0, td_upcall = 0x0,
td_estcpu = 0, td_slptick = 0, td_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 = 0, ru_majflt = 0,
ru_nswap = 0, ru_inblock = 0, ru_oublock = 0, ru_msgsnd = 0,
ru_msgrcv = 0, ru_nsignals = 0, ru_nvcsw = 6414, ru_nivcsw = 38607927},
td_runtime = 2179322361251400, td_pticks = 145105307, td_sticks = 7704049,
td_iticks = 0, td_uticks = 0, td_uuticks = 0, td_usticks = 0,
td_intrval = 0, td_oldsigmask = {__bits = {0, 0, 0, 0}}, td_sigmask = {
---Type <return> to continue, or q <return> to quit---
__bits = {0, 0, 0, 0}}, td_generation = 38614341, td_sigstk = {
ss_sp = 0x0, ss_size = 0, ss_flags = 0}, td_kflags = 0, td_xsig = 0,
td_profil_addr = 0, td_profil_ticks = 0, td_name = '\0' <repeats 19 times>,
td_base_pri = 255 'Ъ', td_priority = 255 'Ъ', td_pri_class = 4 '\004',
td_user_pri = 180 '╢', td_base_user_pri = 180 '╢',
td_pcb = 0xfffffffe8005fd40, td_state = TDS_RUNNING, td_retval = {0, 0},
td_slpcallout = {c_links = {sle = {sle_next = 0x0}, tqe = {tqe_next = 0x0,
tqe_prev = 0x0}}, c_time = 0, c_arg = 0x0, c_func = 0, c_mtx = 0x0,
c_flags = 16}, td_frame = 0xfffffffe8005fc80,
td_kstack_obj = 0xffffff0001431740, td_kstack = 18446744067267477504,
td_kstack_pages = 4, td_altkstack_obj = 0x0, td_altkstack = 0,
td_altkstack_pages = 0, td_critnest = 2, td_md = {md_spinlock_count = 1,
md_saved_flags = 70}, td_sched = 0xffffff0001430d80, td_ar = 0x0,
td_syscalls = 0, td_incruntime = 115662355444194,
td_cpuset = 0xffffff0001424dc8, td_fpop = 0x0, td_dtrace = 0x0, td_errno = 0}
(kgdb) p (struct proc) *0xffffff000142e478
$16 = {p_list = {le_next = 0xffffff000142e8f0, le_prev = 0xffffff00014458f0},
p_threads = {tqh_first = 0xffffff0001430a50, tqh_last = 0xffffff0001430a60},
p_upcalls = {tqh_first = 0x0, tqh_last = 0xffffff000142e498}, p_slock = {
lock_object = {lo_name = 0xffffffff808da2a3 "process slock",
lo_type = 0xffffffff808da2a3 "process slock", lo_flags = 720896,
lo_witness_data = {lod_list = {stqe_next = 0x0}, lod_witness = 0x0}},
mtx_lock = 4, mtx_recurse = 0}, p_ucred = 0xffffff0001300e00,
p_fd = 0xffffff0001443400, p_fdtol = 0x0, p_stats = 0xffffff00012ff600,
p_limit = 0xffffff0001300c00, p_limco = {c_links = {sle = {sle_next = 0x0},
tqe = {tqe_next = 0x0, tqe_prev = 0x0}}, c_time = 0, c_arg = 0x0,
c_func = 0, c_mtx = 0xffffff000142e590, c_flags = 0},
p_sigacts = 0xffffff000143e000, p_flag = 268435980, p_state = PRS_NORMAL,
p_pid = 17, p_hash = {le_next = 0x0, le_prev = 0xfffffffe8021c088},
p_pglist = {le_next = 0xffffff000142e8f0, le_prev = 0xffffff00014459d8},
p_pptr = 0xffffffff80b64640, p_sibling = {le_next = 0xffffff000142e8f0,
le_prev = 0xffffff00014459f0}, p_children = {lh_first = 0x0}, p_mtx = {
lock_object = {lo_name = 0xffffffff808da296 "process lock",
lo_type = 0xffffffff808da296 "process lock", lo_flags = 21168128,
lo_witness_data = {lod_list = {stqe_next = 0x0}, lod_witness = 0x0}},
mtx_lock = 4, mtx_recurse = 0}, p_ksi = 0x0, p_sigqueue = {sq_signals = {
__bits = {0, 0, 0, 0}}, sq_kill = {__bits = {0, 0, 0, 0}}, sq_list = {
tqh_first = 0x0, tqh_last = 0xffffff000142e5e8},
sq_proc = 0xffffff000142e478, sq_flags = 1}, p_oppid = 0,
---Type <return> to continue, or q <return> to quit---
p_vmspace = 0xffffffff80b64e00, p_swtick = 0, 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 = 0, ru_majflt = 0, ru_nswap = 0, ru_inblock = 0,
ru_oublock = 0, ru_msgsnd = 0, ru_msgrcv = 0, ru_nsignals = 0,
ru_nvcsw = 0, ru_nivcsw = 0}, p_rux = {rux_runtime = 2063660005807206,
rux_uticks = 0, rux_sticks = 137401258, rux_iticks = 0, rux_uu = 0,
rux_su = 371936150861, rux_tu = 1034416043011}, 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 = 0x0, p_lock = 0 '\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_numupcalls = 0, p_upsleeps = 0, p_completed = 0x0, p_nextupcall = 0,
p_upquantum = 0, p_magic = 3203398350, p_osrel = 702000,
p_comm = "idle: cpu1\000\000\000\000\000\000\000\000\000",
p_pgrp = 0xffffffff80b65060, p_sysent = 0xffffffff80ad4d80, p_args = 0x0,
p_cpulimit = 9223372036854775807, p_nice = 0 '\0', p_fibnum = 0,
p_xstat = 0, p_klist = {kl_list = {slh_first = 0x0},
kl_lock = 0xffffffff804f65d0 <knlist_mtx_lock>,
---Type <return> to continue, or q <return> to quit---
kl_unlock = 0xffffffff804f5ff0 <knlist_mtx_unlock>,
kl_locked = 0xffffffff804f5fd0 <knlist_mtx_locked>,
kl_lockarg = 0xffffff000142e590}, p_numthreads = 1,
p_md = <incomplete type>, p_itcallout = {c_links = {sle = {sle_next = 0x0},
tqe = {tqe_next = 0x0, tqe_prev = 0x0}}, c_time = 0, c_arg = 0x0,
c_func = 0, c_mtx = 0x0, c_flags = 16}, p_acflag = 1, p_peers = 0x0,
p_leader = 0xffffff000142e478, p_emuldata = 0x0, p_label = 0x0,
p_sched = 0xffffff000142e8f0, p_ktr = {stqh_first = 0x0,
stqh_last = 0xffffff000142e8d0}, p_mqnotifier = {lh_first = 0x0},
p_dtrace = 0x0}
db> show allpcpu
Current CPU: 1
cpuid = 0
curthread = 0xffffff00014306e0: pid 18 "idle: cpu0"
curpcb = 0xfffffffe80064d40
fpcurthread = none
idlethread = 0xffffff00014306e0: pid 18 "idle: cpu0"
cpuid = 1
curthread = 0xffffff0001430a50: pid 17 "idle: cpu1"
curpcb = 0xfffffffe8005fd40
fpcurthread = none
idlethread = 0xffffff0001430a50: pid 17 "idle: cpu1"
cpuid = 2
curthread = 0xffffff000143c000: pid 16 "idle: cpu2"
curpcb = 0xfffffffe8005ad40
fpcurthread = none
idlethread = 0xffffff000143c000: pid 16 "idle: cpu2"
cpuid = 3
curthread = 0xffffff000143c370: pid 15 "idle: cpu3"
curpcb = 0xfffffffe80055d40
fpcurthread = none
idlethread = 0xffffff000143c370: pid 15 "idle: cpu3"
cpuid = 4
curthread = 0xffffff000143c6e0: pid 14 "idle: cpu4"
curpcb = 0xfffffffe80050d40
fpcurthread = none
idlethread = 0xffffff000143c6e0: pid 14 "idle: cpu4"
cpuid = 5
curthread = 0xffffff000144e370: pid 20 "swi4: clock sio"
curpcb = 0xfffffffe8006fd40
fpcurthread = none
idlethread = 0xffffff000142f000: pid 13 "idle: cpu5"
cpuid = 6
curthread = 0xffffff000142f370: pid 12 "idle: cpu6"
curpcb = 0xfffffffe80046d40
fpcurthread = none
idlethread = 0xffffff000142f370: pid 12 "idle: cpu6"
cpuid = 7
curthread = 0xffffff000142f6e0: pid 11 "idle: cpu7"
curpcb = 0xfffffffe80041d40
fpcurthread = none
idlethread = 0xffffff000142f6e0: pid 11 "idle: cpu7"
--
wbr,
pluknet
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