https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293382

--- Comment #2 from Paul <[email protected]> ---
Hi Mark,

Thanks for replying so quickly. Here's the output:


(kgdb) f 8
#8  0xffffffff80572e28 in knote_drop (kn=0xfffff83402622be0,
td=0xfffff80160b9c000) at /usr/src/sys/kern/kern_event.c:2730
2730                    kn->kn_fop->f_detach(kn);
(kgdb) p/x *kn
$2 = {
  kn_link = {
    sle_next = 0x0
  },
  kn_selnext = {
    sle_next = 0x0
  },
  kn_knlist = 0x0,
  kn_tqe = {
    tqe_next = 0x0,
    tqe_prev = 0x0
  },
  kn_kq = 0x0,
  kn_kevent = {
    ident = 0x0,
    filter = 0x0,
    flags = 0x0,
    fflags = 0x0,
    data = 0x0,
    udata = 0x0,
    ext = {0x0, 0x0, 0x0, 0x0}
  },
  kn_hook = 0x0,
  kn_hookid = 0x0,
  kn_status = 0x20,
  kn_influx = 0x1,
  kn_sfflags = 0x0,
  kn_sdata = 0x0,
  kn_ptr = {
    p_fp = 0x0,
    p_proc = 0x0,
    p_aio = 0x0,
    p_lio = 0x0,
    p_v = 0x0
  },
  kn_fop = 0x0
}
(kgdb) f 10
#10 0xffffffff8056b750 in closefp_impl (fdp=0xfffffe0d1582a920, fd=0,
fp=0xfffff81090d2c5a0, td=0xfffff80160b9c000, audit=true) at
/usr/src/sys/kern/kern_descrip.c:1320
1320                    knote_fdclose(td, fd);
(kgdb) p/x *fp
$3 = {
  f_flag = 0x7,
  f_count = 0x1,
  f_data = 0xfffff81a3dbd4000,
  f_ops = 0xffffffff80a673d0,
  f_vnode = 0x0,
  f_cred = 0xfffff8014c5acb00,
  f_type = 0x2,
  f_vflags = 0x0,
  {
    f_seqcount = {0x0, 0x0},
    f_pipegen = 0x0
  },
  f_nextoff = {0x0, 0x0},
  f_vnun = {
    fvn_cdevpriv = 0x0,
    fvn_advice = 0x0
  },
  f_offset = 0x0
}


Unfortunately, it is not reproducible. We've been using this system for around
a month under this load. And it's the first time it happened. The other server
is using it for around two months. Probably, Monday morning has something to do
with it. As it's usually the time when the most users are active at the same
time.

We've been using this software for years, on earlier versions of FreeBSD and
had basically no critical issues. However, this generation of servers are order
of magnitude faster than what we were using before. Additionally, we've go a
100GbE card in there. And we've already faced a kernel panic regarding `int`
counter ofverflow within a network stack. That was on 14.3-STABLE and we've
reported it in August. Hopefully, shrinking `kern.ipc.maxsockbuf` helped in
that case.

I'm saying all this because we suspect that this may be a similar issue: some
race condition within a kernel, that was impossible to reproduce on slower
hardware, now can be reproduced, occasionally.

Stacks of other threads:

<unnamed-1>

#0  sched_switch (td=td@entry=0xfffff80d4121b740, flags=flags@entry=259) at
/usr/src/sys/kern/sched_ule.c:2437
#1  0xffffffff805d57ad in mi_switch (flags=flags@entry=259) at
/usr/src/sys/kern/kern_synch.c:548
#2  0xffffffff80622c19 in sleepq_switch (wchan=wchan@entry=0xfffff87af7163e00,
pri=pri@entry=46) at /usr/src/sys/kern/subr_sleepqueue.c:608
#3  0xffffffff80623042 in sleepq_catch_signals
(wchan=wchan@entry=0xfffff87af7163e00, pri=46) at
/usr/src/sys/kern/subr_sleepqueue.c:523
#4  0xffffffff80623242 in sleepq_timedwait_sig (wchan=<unavailable>,
wchan@entry=0xfffff87af7163e00, pri=<unavailable>) at
/usr/src/sys/kern/subr_sleepqueue.c:704
#5  0xffffffff805d4ed1 in _sleep (ident=ident@entry=0xfffff87af7163e00,
lock=lock@entry=0xfffff87af7163e00, priority=priority@entry=302,
wmesg=<optimized out>, sbt=sbt@entry=4671013802915906, pr=pr@entry=382252,
flags=512) at /usr/src/sys/kern/kern_synch.c:217
#6  0xffffffff80574121 in kqueue_scan (kq=kq@entry=0xfffff87af7163e00,
maxevents=maxevents@entry=128, k_ops=k_ops@entry=0xfffffe07027f4de0,
tsp=tsp@entry=0xfffffe07027f4d38, keva=keva@entry=0xfffffe07027f4a90,
td=td@entry=0xfffff80d4121b740) at /usr/src/sys/kern/kern_event.c:1983
#7  0xffffffff80571bdb in kqueue_kevent (kq=kq@entry=0xfffff87af7163e00,
td=td@entry=0xfffff80d4121b740, nchanges=<optimized out>, nchanges@entry=0,
nevents=<optimized out>, nevents@entry=128,
k_ops=k_ops@entry=0xfffffe07027f4de0, timeout=0xfffffe07027f4d38) at
/usr/src/sys/kern/kern_event.c:1377
#8  0xffffffff8057193b in kern_kevent_fp (td=td@entry=0xfffff80d4121b740,
fp=<optimized out>, nchanges=nchanges@entry=0, nevents=nevents@entry=128,
k_ops=k_ops@entry=0xfffffe07027f4de0, timeout=<unavailable>,
timeout@entry=0xfffffe07027f4d38) at /usr/src/sys/kern/kern_event.c:1390
#9  0xffffffff805715cf in kern_kevent (td=0xfffff80d4121b740, fd=<optimized
out>, nchanges=0, nevents=128, k_ops=0xfffffe07027f4de0,
timeout=0xfffffe07027f4d38) at /usr/src/sys/kern/kern_event.c:1330
#10 kern_kevent_generic (td=0xfffff80d4121b740,
uap=uap@entry=0xfffffe07027f4db0, k_ops=k_ops@entry=0xfffffe07027f4de0,
struct_name=0xffffffff809ea8f0 "kevent") at /usr/src/sys/kern/kern_event.c:1186
#11 0xffffffff80571481 in sys_kevent (td=<unavailable>, uap=<optimized out>) at
/usr/src/sys/kern/kern_event.c:1159
#12 0xffffffff80973847 in syscallenter (td=0xfffff80d4121b740) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#13 amd64_syscall (td=0xfffff80d4121b740, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1241
#14 <signal handler called>
#15 0x000000082deed3ea in ?? ()


<unnamed-2>

#0  sched_switch (td=td@entry=0xfffff806652e6000, flags=flags@entry=259) at
/usr/src/sys/kern/sched_ule.c:2437
#1  0xffffffff805d57ad in mi_switch (flags=flags@entry=259) at
/usr/src/sys/kern/kern_synch.c:548
#2  0xffffffff80622c19 in sleepq_switch (wchan=wchan@entry=0xfffff8014c472300,
pri=pri@entry=0) at /usr/src/sys/kern/subr_sleepqueue.c:608
#3  0xffffffff80623042 in sleepq_catch_signals
(wchan=wchan@entry=0xfffff8014c472300, pri=0) at
/usr/src/sys/kern/subr_sleepqueue.c:523
#4  0xffffffff80622d89 in sleepq_wait_sig (wchan=<unavailable>,
wchan@entry=0xfffff8014c472300, pri=<unavailable>) at
/usr/src/sys/kern/subr_sleepqueue.c:671
#5  0xffffffff805d4ef6 in _sleep (ident=0xfffff8014c472300,
lock=lock@entry=0xffffffff81105070 <umtxq_chains+43360>,
priority=priority@entry=768, wmesg=wmesg@entry=0xffffffff809adf23 "uwait",
sbt=sbt@entry=0, pr=pr@entry=0, flags=0) at /usr/src/sys/kern/kern_synch.c:221
#6  0xffffffff805e94ed in umtxq_sleep (uq=uq@entry=0xfffff8014c472300,
wmesg=0xffffffff809adf23 "uwait", timo=0x0) at
/usr/src/sys/kern/kern_umtx.c:840
#7  0xffffffff805eed24 in do_wait (td=td@entry=0xfffff806652e6000,
addr=<optimized out>, id=0, timeout=timeout@entry=0x0,
compat32=compat32@entry=1, is_private=is_private@entry=1) at
/usr/src/sys/kern/kern_umtx.c:1313
#8  0xffffffff805ecdc4 in __umtx_op_wait_uint_private (td=0xfffff806652e6000,
uap=0xfffffe071c199dd8, ops=<optimized out>) at
/usr/src/sys/kern/kern_umtx.c:3986
#9  0xffffffff805eae5e in kern__umtx_op (td=<unavailable>, obj=<optimized out>,
val=<unavailable>, uaddr1=<unavailable>, uaddr2=<optimized out>,
ops=<unavailable>, op=<optimized out>) at /usr/src/sys/kern/kern_umtx.c:4995
#10 sys__umtx_op (td=<unavailable>, uap=<optimized out>) at
/usr/src/sys/kern/kern_umtx.c:5020
#11 0xffffffff80973847 in syscallenter (td=0xfffff806652e6000) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#12 amd64_syscall (td=0xfffff806652e6000, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1241
#13 <signal handler called>
#14 0x00000008221050ac in ?? ()


<redacted-1>

#0  sched_switch (td=td@entry=0xfffff80dd2a60740, flags=flags@entry=259) at
/usr/src/sys/kern/sched_ule.c:2437
#1  0xffffffff805d57ad in mi_switch (flags=flags@entry=259) at
/usr/src/sys/kern/kern_synch.c:548
#2  0xffffffff80622c19 in sleepq_switch (wchan=wchan@entry=0xfffff80cadb2ab00,
pri=pri@entry=0) at /usr/src/sys/kern/subr_sleepqueue.c:608
#3  0xffffffff80623042 in sleepq_catch_signals
(wchan=wchan@entry=0xfffff80cadb2ab00, pri=0) at
/usr/src/sys/kern/subr_sleepqueue.c:523
#4  0xffffffff80623242 in sleepq_timedwait_sig (wchan=<unavailable>,
wchan@entry=0xfffff80cadb2ab00, pri=<unavailable>) at
/usr/src/sys/kern/subr_sleepqueue.c:704
#5  0xffffffff805d4ed1 in _sleep (ident=0xfffff80cadb2ab00,
lock=lock@entry=0xffffffff8110d590 <umtxq_chains+77440>,
priority=priority@entry=768, wmesg=wmesg@entry=0xffffffff809adf23 "uwait",
sbt=sbt@entry=4671013812078118, pr=pr@entry=0, flags=512) at
/usr/src/sys/kern/kern_synch.c:217
#6  0xffffffff805e94ed in umtxq_sleep (uq=uq@entry=0xfffff80cadb2ab00,
wmesg=0xffffffff809adf23 "uwait", timo=0xfffffe0784849d20) at
/usr/src/sys/kern/kern_umtx.c:840
#7  0xffffffff805eed24 in do_wait (td=td@entry=0xfffff80dd2a60740,
addr=<optimized out>, id=0, timeout=timeout@entry=0xfffffe0784849d90,
compat32=compat32@entry=1, is_private=is_private@entry=1) at
/usr/src/sys/kern/kern_umtx.c:1313
#8  0xffffffff805ecdc4 in __umtx_op_wait_uint_private (td=0xfffff80dd2a60740,
uap=0xfffffe0784849dd8, ops=<optimized out>) at
/usr/src/sys/kern/kern_umtx.c:3986
#9  0xffffffff805eae5e in kern__umtx_op (td=<unavailable>, obj=<optimized out>,
val=<unavailable>, uaddr1=<unavailable>, uaddr2=<optimized out>,
ops=<unavailable>, op=<optimized out>) at /usr/src/sys/kern/kern_umtx.c:4995
#10 sys__umtx_op (td=<unavailable>, uap=<optimized out>) at
/usr/src/sys/kern/kern_umtx.c:5020
#11 0xffffffff80973847 in syscallenter (td=0xfffff80dd2a60740) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#12 amd64_syscall (td=0xfffff80dd2a60740, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1241
#13 <signal handler called>
#14 0x00000008221050ac in ?? ()


<redacted-2>

#0  sched_switch (td=td@entry=0xfffff80b2f110740, flags=flags@entry=259) at
/usr/src/sys/kern/sched_ule.c:2437
#1  0xffffffff805d57ad in mi_switch (flags=flags@entry=259) at
/usr/src/sys/kern/kern_synch.c:548
#2  0xffffffff80622c19 in sleepq_switch (wchan=wchan@entry=0xfffff85578222600,
pri=pri@entry=46) at /usr/src/sys/kern/subr_sleepqueue.c:608
#3  0xffffffff80623042 in sleepq_catch_signals
(wchan=wchan@entry=0xfffff85578222600, pri=46) at
/usr/src/sys/kern/subr_sleepqueue.c:523
#4  0xffffffff80623242 in sleepq_timedwait_sig (wchan=<unavailable>,
wchan@entry=0xfffff85578222600, pri=<unavailable>) at
/usr/src/sys/kern/subr_sleepqueue.c:704
#5  0xffffffff805d4ed1 in _sleep (ident=ident@entry=0xfffff85578222600,
lock=lock@entry=0xfffff85578222600, priority=priority@entry=302,
wmesg=<optimized out>, sbt=sbt@entry=4671017460503269, pr=pr@entry=263550736,
flags=512) at /usr/src/sys/kern/kern_synch.c:217
#6  0xffffffff80574121 in kqueue_scan (kq=kq@entry=0xfffff85578222600,
maxevents=maxevents@entry=128, k_ops=k_ops@entry=0xfffffe071c18fde0,
tsp=tsp@entry=0xfffffe071c18fd38, keva=keva@entry=0xfffffe071c18fa90,
td=td@entry=0xfffff80b2f110740) at /usr/src/sys/kern/kern_event.c:1983
#7  0xffffffff80571bdb in kqueue_kevent (kq=kq@entry=0xfffff85578222600,
td=td@entry=0xfffff80b2f110740, nchanges=<optimized out>, nchanges@entry=0,
nevents=<optimized out>, nevents@entry=128,
k_ops=k_ops@entry=0xfffffe071c18fde0, timeout=0xfffffe071c18fd38) at
/usr/src/sys/kern/kern_event.c:1377
#8  0xffffffff8057193b in kern_kevent_fp (td=td@entry=0xfffff80b2f110740,
fp=<optimized out>, nchanges=nchanges@entry=0, nevents=nevents@entry=128,
k_ops=k_ops@entry=0xfffffe071c18fde0, timeout=<unavailable>,
timeout@entry=0xfffffe071c18fd38) at /usr/src/sys/kern/kern_event.c:1390
#9  0xffffffff805715cf in kern_kevent (td=0xfffff80b2f110740, fd=<optimized
out>, nchanges=0, nevents=128, k_ops=0xfffffe071c18fde0,
timeout=0xfffffe071c18fd38) at /usr/src/sys/kern/kern_event.c:1330
#10 kern_kevent_generic (td=0xfffff80b2f110740,
uap=uap@entry=0xfffffe071c18fdb0, k_ops=k_ops@entry=0xfffffe071c18fde0,
struct_name=0xffffffff809ea8f0 "kevent") at /usr/src/sys/kern/kern_event.c:1186
#11 0xffffffff80571481 in sys_kevent (td=<unavailable>, uap=<optimized out>) at
/usr/src/sys/kern/kern_event.c:1159
#12 0xffffffff80973847 in syscallenter (td=0xfffff80b2f110740) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#13 amd64_syscall (td=0xfffff80b2f110740, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1241
#14 <signal handler called>
#15 0x000000082deed3ea in ?? ()


<redacted-3>    <--- Cause of crash

#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
#1  doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:405
#2  0xffffffff805c7beb in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:523
#3  0xffffffff805c80e9 in vpanic (fmt=0xffffffff809d2ae7 "%s",
ap=ap@entry=0xfffffe071c126c30) at /usr/src/sys/kern/kern_shutdown.c:967
#4  0xffffffff805c7f23 in panic (fmt=<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:891
#5  0xffffffff80972f00 in trap_fatal (frame=<optimized out>, eva=<optimized
out>) at /usr/src/sys/amd64/amd64/trap.c:1000
#6  0xffffffff80972f00 in trap_pfault (frame=0xfffffe071c126cb0,
usermode=false, signo=<optimized out>, ucode=<optimized out>)
#7  <signal handler called>
#8  0xffffffff80572e28 in knote_drop (kn=0xfffff83402622be0,
td=0xfffff80160b9c000) at /usr/src/sys/kern/kern_event.c:2730
#9  knote_fdclose (td=0xfffff80160b9c000, fd=201569) at
/usr/src/sys/kern/kern_event.c:2695
#10 0xffffffff8056b750 in closefp_impl (fdp=0xfffffe0d1582a920, fd=0,
fp=0xfffff81090d2c5a0, td=0xfffff80160b9c000, audit=true) at
/usr/src/sys/kern/kern_descrip.c:1320
#11 0xffffffff80973847 in syscallenter (td=0xfffff80160b9c000) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#12 amd64_syscall (td=0xfffff80160b9c000, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1241
#13 <signal handler called>
#14 0x000000082deed32a in ?? ()


<redacted-4>

#0  sched_switch (td=td@entry=0xfffff80dd249a740, flags=flags@entry=259) at
/usr/src/sys/kern/sched_ule.c:2437
#1  0xffffffff805d57ad in mi_switch (flags=flags@entry=259) at
/usr/src/sys/kern/kern_synch.c:548
#2  0xffffffff80622c19 in sleepq_switch (wchan=wchan@entry=0xfffff86a10f16b00,
pri=pri@entry=46) at /usr/src/sys/kern/subr_sleepqueue.c:608
#3  0xffffffff80623042 in sleepq_catch_signals
(wchan=wchan@entry=0xfffff86a10f16b00, pri=46) at
/usr/src/sys/kern/subr_sleepqueue.c:523
#4  0xffffffff80623242 in sleepq_timedwait_sig (wchan=<unavailable>,
wchan@entry=0xfffff86a10f16b00, pri=<unavailable>) at
/usr/src/sys/kern/subr_sleepqueue.c:704
#5  0xffffffff805d4ed1 in _sleep (ident=ident@entry=0xfffff86a10f16b00,
lock=lock@entry=0xfffff86a10f16b00, priority=priority@entry=302,
wmesg=<optimized out>, sbt=sbt@entry=4671013829273089, pr=pr@entry=2046015,
flags=512) at /usr/src/sys/kern/kern_synch.c:217
#6  0xffffffff80574121 in kqueue_scan (kq=kq@entry=0xfffff86a10f16b00,
maxevents=maxevents@entry=128, k_ops=k_ops@entry=0xfffffe0784853de0,
tsp=tsp@entry=0xfffffe0784853d38, keva=keva@entry=0xfffffe0784853a90,
td=td@entry=0xfffff80dd249a740) at /usr/src/sys/kern/kern_event.c:1983
#7  0xffffffff80571bdb in kqueue_kevent (kq=kq@entry=0xfffff86a10f16b00,
td=td@entry=0xfffff80dd249a740, nchanges=<optimized out>, nchanges@entry=0,
nevents=<optimized out>, nevents@entry=128,
k_ops=k_ops@entry=0xfffffe0784853de0, timeout=0xfffffe0784853d38) at
/usr/src/sys/kern/kern_event.c:1377
#8  0xffffffff8057193b in kern_kevent_fp (td=td@entry=0xfffff80dd249a740,
fp=<optimized out>, nchanges=nchanges@entry=0, nevents=nevents@entry=128,
k_ops=k_ops@entry=0xfffffe0784853de0, timeout=<unavailable>,
timeout@entry=0xfffffe0784853d38) at /usr/src/sys/kern/kern_event.c:1390
#9  0xffffffff805715cf in kern_kevent (td=0xfffff80dd249a740, fd=<optimized
out>, nchanges=0, nevents=128, k_ops=0xfffffe0784853de0,
timeout=0xfffffe0784853d38) at /usr/src/sys/kern/kern_event.c:1330
#10 kern_kevent_generic (td=0xfffff80dd249a740,
uap=uap@entry=0xfffffe0784853db0, k_ops=k_ops@entry=0xfffffe0784853de0,
struct_name=0xffffffff809ea8f0 "kevent") at /usr/src/sys/kern/kern_event.c:1186
#11 0xffffffff80571481 in sys_kevent (td=<unavailable>, uap=<optimized out>) at
/usr/src/sys/kern/kern_event.c:1159
#12 0xffffffff80973847 in syscallenter (td=0xfffff80dd249a740) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#13 amd64_syscall (td=0xfffff80dd249a740, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1241
#14 <signal handler called>
#15 0x000000082deed3ea in ?? ()

<redacted-5>

#0  sched_switch (td=td@entry=0xfffff80dd2e41740, flags=flags@entry=259) at
/usr/src/sys/kern/sched_ule.c:2437
#1  0xffffffff805d57ad in mi_switch (flags=flags@entry=259) at
/usr/src/sys/kern/kern_synch.c:548
#2  0xffffffff80622c19 in sleepq_switch (wchan=wchan@entry=0xfffff85d0d270b00,
pri=pri@entry=46) at /usr/src/sys/kern/subr_sleepqueue.c:608
#3  0xffffffff80623042 in sleepq_catch_signals
(wchan=wchan@entry=0xfffff85d0d270b00, pri=46) at
/usr/src/sys/kern/subr_sleepqueue.c:523
#4  0xffffffff80623242 in sleepq_timedwait_sig (wchan=<unavailable>,
wchan@entry=0xfffff85d0d270b00, pri=<unavailable>) at
/usr/src/sys/kern/subr_sleepqueue.c:704
#5  0xffffffff805d4ed1 in _sleep (ident=ident@entry=0xfffff85d0d270b00,
lock=lock@entry=0xfffff85d0d270b00, priority=priority@entry=302,
wmesg=<optimized out>, sbt=sbt@entry=4671014242900761, pr=pr@entry=36144028,
flags=512) at /usr/src/sys/kern/kern_synch.c:217
#6  0xffffffff80574121 in kqueue_scan (kq=kq@entry=0xfffff85d0d270b00,
maxevents=maxevents@entry=128, k_ops=k_ops@entry=0xfffffe071c1a3de0,
tsp=tsp@entry=0xfffffe071c1a3d38, keva=keva@entry=0xfffffe071c1a3a90,
td=td@entry=0xfffff80dd2e41740) at /usr/src/sys/kern/kern_event.c:1983
#7  0xffffffff80571bdb in kqueue_kevent (kq=kq@entry=0xfffff85d0d270b00,
td=td@entry=0xfffff80dd2e41740, nchanges=<optimized out>, nchanges@entry=0,
nevents=<optimized out>, nevents@entry=128,
k_ops=k_ops@entry=0xfffffe071c1a3de0, timeout=0xfffffe071c1a3d38) at
/usr/src/sys/kern/kern_event.c:1377
#8  0xffffffff8057193b in kern_kevent_fp (td=td@entry=0xfffff80dd2e41740,
fp=<optimized out>, nchanges=nchanges@entry=0, nevents=nevents@entry=128,
k_ops=k_ops@entry=0xfffffe071c1a3de0, timeout=<unavailable>,
timeout@entry=0xfffffe071c1a3d38) at /usr/src/sys/kern/kern_event.c:1390
#9  0xffffffff805715cf in kern_kevent (td=0xfffff80dd2e41740, fd=<optimized
out>, nchanges=0, nevents=128, k_ops=0xfffffe071c1a3de0,
timeout=0xfffffe071c1a3d38) at /usr/src/sys/kern/kern_event.c:1330
#10 kern_kevent_generic (td=0xfffff80dd2e41740,
uap=uap@entry=0xfffffe071c1a3db0, k_ops=k_ops@entry=0xfffffe071c1a3de0,
struct_name=0xffffffff809ea8f0 "kevent") at /usr/src/sys/kern/kern_event.c:1186
#11 0xffffffff80571481 in sys_kevent (td=<unavailable>, uap=<optimized out>) at
/usr/src/sys/kern/kern_event.c:1159
#12 0xffffffff80973847 in syscallenter (td=0xfffff80dd2e41740) at
/usr/src/sys/amd64/amd64/../../kern/subr_syscall.c:193
#13 amd64_syscall (td=0xfffff80dd2e41740, traced=0) at
/usr/src/sys/amd64/amd64/trap.c:1241
#14 <signal handler called>
#15 0x000000082deed3ea in ?? ()

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