LOR on 10.2-REL-p8 z/ ZFS + NFS?

[Adrian Chadd]

Hiya,

Someone asked me about this. It's happening on a 10.2-REL-p8 box
serving ZFS via NFS.

lock order reversal:
 1st 0xfffff801ed92ca28 zfs (zfs) @
/usr/src/sys/fs/nfsserver/nfs_nfsdsocket.c:967
 2nd 0xfffff8015f98a068 ufs (ufs) @ /usr/src/sys/kern/vfs_vnops.c:534
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0467b8bb30
kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe0467b8bbe0
witness_checkorder() at witness_checkorder+0xe24/frame 0xfffffe0467b8bc70
__lockmgr_args() at __lockmgr_args+0x9d9/frame 0xfffffe0467b8bdb0
ffs_lock() at ffs_lock+0x92/frame 0xfffffe0467b8be00
VOP_LOCK1_APV() at VOP_LOCK1_APV+0xfc/frame 0xfffffe0467b8be30
_vn_lock() at _vn_lock+0xd2/frame 0xfffffe0467b8bea0
vn_rdwr() at vn_rdwr+0x1c1/frame 0xfffffe0467b8bf80
nfsrv_writestable() at nfsrv_writestable+0xbd/frame 0xfffffe0467b8bff0
nfsrv_openupdate() at nfsrv_openupdate+0x557/frame 0xfffffe0467b8c480
nfsrvd_openconfirm() at nfsrvd_openconfirm+0x175/frame 0xfffffe0467b8c560
nfsrvd_dorpc() at nfsrvd_dorpc+0xf66/frame 0xfffffe0467b8c720
nfssvc_program() at nfssvc_program+0x4e6/frame 0xfffffe0467b8c8d0
svc_run_internal() at svc_run_internal+0xbb7/frame 0xfffffe0467b8ca60
svc_thread_start() at svc_thread_start+0xb/frame 0xfffffe0467b8ca70
fork_exit() at fork_exit+0x84/frame 0xfffffe0467b8cab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0467b8cab0
--- trap 0xc, rip = 0x80089242a, rsp = 0x7fffffffe5d8, rbp = 0x7fffffffe880 ---

Any ideas?



-a