On 02/04/2018 14:44, Eugene Grosbein wrote:
3. Boot new kernel using nextboot(8) and see if it will crash instead of 
deadlock
and if so, fill the PR to Bugzilla.

Thanks again. Drat, no crash. The only difference was a few new errors during the boot - which I'm assuming are unrelated.

Apr  2 17:27:58 shrewd kernel: [16] lock order reversal:
Apr  2 17:27:58 shrewd kernel: [16]  1st 0xfffff80077653418 ufs (ufs) @ 
/usr/src/sys/kern/vfs_subr.c:2253
Apr  2 17:27:58 shrewd kernel: [16]  2nd 0xfffffe03dbe7d218 bufwait (bufwait) @ 
/usr/src/sys/ufs/ffs/ffs_vnops.c:262
Apr  2 17:27:58 shrewd kernel: [16]  3rd 0xfffff80077c089a0 ufs (ufs) @ 
/usr/src/sys/kern/vfs_subr.c:2253
Apr  2 17:27:58 shrewd kernel: [16] KDB: stack backtrace:
Apr  2 17:27:58 shrewd kernel: [16] db_trace_self_wrapper() at 
db_trace_self_wrapper+0x2b/frame 0xfffffe0462049b30
Apr  2 17:27:58 shrewd kernel: [16] kdb_backtrace() at kdb_backtrace+0x39/frame 
0xfffffe0462049be0
Apr  2 17:27:58 shrewd kernel: [16] witness_checkorder() at 
witness_checkorder+0xe2b/frame 0xfffffe0462049c70
Apr  2 17:27:58 shrewd kernel: [16] __lockmgr_args() at 
__lockmgr_args+0x988/frame 0xfffffe0462049d90
Apr  2 17:27:58 shrewd kernel: [16] ffs_lock() at ffs_lock+0x84/frame 
0xfffffe0462049de0
Apr  2 17:27:58 shrewd kernel: [16] VOP_LOCK1_APV() at VOP_LOCK1_APV+0xfc/frame 
0xfffffe0462
Apr  2 17:27:58 shrewd kernel: 049e10
Apr  2 17:27:59 shrewd kernel: [16] _vn_lock() at _vn_lock+0xaa/frame 
0xfffffe0462049e80
Apr  2 17:27:59 shrewd kernel: [16] vget() at vget+0x67/frame 0xfffffe0462049ec0
Apr  2 17:27:59 shrewd kernel: [16] vfs_hash_get() at vfs_hash_get+0xe1/frame 
0xfffffe0462049f10
Apr  2 17:27:59 shrewd kernel: [16] ffs_vgetf() at ffs_vgetf+0x40/frame 
0xfffffe0462049fa0
Apr  2 17:27:59 shrewd kernel: [16] softdep_sync_buf() at 
softdep_sync_buf+0xa25/frame 0xfffffe046204a090
Apr  2 17:27:59 shrewd kernel: [16] ffs_syncvnode() at 
ffs_syncvnode+0x286/frame 0xfffffe046204a110
Apr  2 17:27:59 shrewd kernel: [16] ffs_truncate() at ffs_truncate+0x6a9/frame 
0xfffffe046204a2f0
Apr  2 17:27:59 shrewd kernel: [16] ufs_direnter() at ufs_direnter+0x7c8/frame 
0xfffffe046204a3b0
Apr  2 17:27:59 shrewd kernel: [16] ufs_makeinode() at 
ufs_makeinode+0x5d9/frame 0xfffffe046204a570
Apr  2 17:27:59 shrewd kernel: [16] ufs_create() at ufs_create+0x34/frame 
0xfffffe046204a590
Apr  2 17:27:59 shrewd kernel: [16] VOP_CREATE_APV() at 
VOP_CREATE_APV+0xf1/frame 0xfffffe046204a5c0
Apr  2 17:27:59 shrewd kernel: [16] vn_open_cred() at vn_open_cred+0x2c3/frame 
0xfffffe046204a720
Apr  2 17:27:59 shrewd kernel: [16] kern_openat() at kern_openat+0x26f/frame 
0xfffffe046204a8a0
Apr  2 17:27:59 shrewd kernel: [16] amd64_syscall() at 
amd64_syscall+0x2c6/frame 0xfffffe046204a9b0
Apr  2 17:27:59 shrewd kernel: [16] Xfast_syscall() at Xfast_syscall+0xfb/frame 
0xfffffe046204a9b0
Apr  2 17:27:59 shrewd kernel: [16] --- syscall (5, FreeBSD ELF64, sys_open), 
rip = 0x801fcc9aa, rsp = 0x7fffdfdf9c38, rbp = 0x7fffdfdf9c60 ---
Apr  2 17:28:48 shrewd kernel: [66] lock order reversal:
Apr  2 17:28:48 shrewd kernel: [66]  1st 0xfffffe03dbf949f8 bufwait (bufwait) @ 
/usr/src/sys/kern/vfs_bio.c:3130
Apr  2 17:28:48 shrewd kernel: [66]  2nd 0xfffff8000b741000 dirhash (dirhash) @ 
/usr/src/sys/ufs/ufs/ufs_dirhash.c:280
Apr  2 17:28:48 shrewd kernel: [66] KDB: stack backtrace:
Apr  2 17:28:48 shrewd kernel: [66] db_trace_self_wrapper() at 
db_trace_self_wrapper+0x2b/frame 0xfffffe0462185130
Apr  2 17:28:48 shrewd kernel: [66] kdb_backtrace() at kdb_backtrace+0x39/frame 
0xfffffe04621851e0
Apr  2 17:28:48 shrewd kernel: [66] witness_checkorder() at 
witness_checkorder+0xe2b/frame 0xfffffe0462185270
Apr  2 17:28:48 shrewd kernel: [66] _sx_xlock() at _sx_xlock+0x75/frame 
0xfffffe04621852b0
Apr  2 17:28:48 shrewd kernel: [66] ufsdirhash_add() at 
ufsdirhash_add+0x3a/frame 0xfffffe04621852f0
Apr  2 17:28:48 shrewd kernel: [66] ufs_direnter() at ufs_direnter+0x622/frame 
0xfffffe04621853b0
Apr  2 17:28:48 shrewd kernel: [66] ufs_makeinode() at 
ufs_makeinode+0x5d9/frame 0xfffffe0462185570
Apr  2 17:28:48 shrewd kernel: [66] ufs_create() at ufs_create+0x34/frame 
0xfffffe0462185590
Apr  2 17:28:48 shrewd kernel: [66] VOP_CREATE_APV() at 
VOP_CREATE_APV+0xf1/frame 0xfffffe04621855c0
Apr  2 17:28:48 shrewd kernel: [66] vn_open_cred() at vn_open_cred+0x2c3/frame 
0xfffffe0462185720
Apr  2 17:28:48 shrewd kernel: [66] kern_openat() at kern_openat+0x26f/frame 
0xfffffe04621858a0
Apr  2 17:28:48 shrewd kernel: [66] amd64_syscall() at 
amd64_syscall+0x2c6/frame 0xfffffe04621859b0
Apr  2 17:28:48 shrewd kernel: [66] Xfast_syscall() at Xfast_syscall+0xfb/frame 
0xfffffe04621859b0
Apr  2 17:28:48 shrewd kernel: [66] --- syscall (499, FreeBSD ELF64, 
sys_openat), rip = 0x80174cb7a, rsp = 0x7fffffff7f58, rbp = 0x7fffffff7fd0 ---

--
Mark Knight
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