lock order reversal:
 1st 0xfffff8001bcfdcb0 zfs (zfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:2253
 2nd 0xfffff8026968ce70 pseudofs (pseudofs, lockmgr) @ /usr/src/sys/kern/vfs_subr.c:4095
lock order zfs -> pseudofs attempted at:
#0 0xffffffff80bc4bce at witness_checkorder+0xbbe
#1 0xffffffff80b1dff1 at lockmgr_lock_flags+0x181
#2 0xffffffff80c60c23 at _vn_lock+0x53
#3 0xffffffff80c49341 at vflush+0x101
#4 0xffffffff80c3dd95 at dounmount+0x7b5
#5 0xffffffff80c3d57b at kern_unmount+0x2eb
#6 0xffffffff810556a3 at amd64_syscall+0x153
#7 0xffffffff810275bb at fast_syscall_common+0xf8
lock order reversal:
 1st 0xfffff8001b5d4230 zfs (zfs, lockmgr) @ /usr/src/sys/kern/vfs_mount.c:2253
 2nd 0xfffff8001b807230 devfs (devfs, lockmgr) @ /usr/src/sys/kern/vfs_subr.c:3294
lock order zfs -> devfs attempted at:
#0 0xffffffff80bc4bce at witness_checkorder+0xbbe
#1 0xffffffff80b1f975 at lockmgr_xlock+0x55
#2 0xffffffff80c60c23 at _vn_lock+0x53
#3 0xffffffff80c481ed at vget_finish+0x4d
#4 0xffffffff809d65de at devfs_allocv+0xbe
#5 0xffffffff809d5d93 at devfs_root+0x43
#6 0xffffffff80c4ce60 at vfs_cache_root_fallback+0x110
#7 0xffffffff80c4928b at vflush+0x4b
#8 0xffffffff809d5c9e at devfs_unmount+0x3e
#9 0xffffffff80c3dd95 at dounmount+0x7b5
#10 0xffffffff80c3d57b at kern_unmount+0x2eb
#11 0xffffffff810556a3 at amd64_syscall+0x153
#12 0xffffffff810275bb at fast_syscall_common+0xf8