r315684 panic: sleepq_add: td 0xfffff80003c01a40 to sleep on wchan 0xfffff80006f0873c with sleeping prohibited

From: Darren <darren780_at_yahoo.com>
Date: Fri, 24 Mar 2017 17:40:15 +0000 (UTC)
I am getting this panic every hour to every couple of hours.

FreeBSD asrock 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r315684: Thu Mar 23 14:56:45 EDT 2017     darren_at_asrock:/usr/obj/usr/src/sys/GENERIC  amd64
I manually typed out the following, apologize for any typos. 


panic: sleepq_add: td 0xfffff80003c01a40 to sleep on wchan 0xfffff80006f0873c with sleeping prohibited
cpuid = 0
time = 1490372797
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0072e33690
vpanic() at vpanic+0x19c/frame 0xfffffe0072e33710
kassert_panic() at kassert_panic+0x126/frame 0xfffffe0072e33780
sleepq_add() at sleepq_add+0x34f/frame 0xfffffe0072337d0
_sleep() at _sleep+0x28d/frame 0xfffffe0072e33870
soclose() at soclose+0xda/frame 0xfffffe0072e338b0
_fdrop() at _fdrop+0x1a/frame 0xfffffe0072e338d0
sendfile_iodone() at sendfile_iodone+0x19d/frame 0xfffffe0072e33910
vnode_pager_generic_getpages_done_async() at vnode_pager_generic_getpages_done_async+037/frame 0xfffffe0072e33930
bufdone() at bufdone+0x64/frame 0xfffffe0072e33960
g_io_deliver() at g_io_deliver+0x276/frame 0xfffffe0072e339b0
g_io_deliver() at g_io_deliver+0x276/frame 0xfffffe0072e33a00
g_disk_done() at g_disk_done+0x104/frame 0xfffffe0072e33a40
xpt_done_process() at xpt_done_process+0x35f/frame 0xfffffe0072e33a80
xpt_done_direct() at ahci_ch_intr_direct+0xd5/frame 0xfffffe0072e33af0
ahci_itr() at ahci_intr+0x102/frame 0xfffffe0072e33b20
intr_event_execute_handlers() at intr_event_execute_handlers+0x99/frame 0xfffffe0072e33b60
ithread_loop() at ithread_loop+0xb6/frame 0xfffffe0072e33bb0
fork_exit() at fork_exit+0x84/frame 0xfffffe0072e33bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0072e33bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100038 ]
Stopped at      kdb_enter+0x3b: movq    $0,kdb_why
db>
Received on Fri Mar 24 2017 - 16:42:20 UTC

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