Date: Sat, 9 Jan 2016 07:06:32 -0800 From: Adrian Chadd <adrian@freebsd.org> To: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: LOR on 10.2-REL-p8 z/ ZFS + NFS? Message-ID: <CAJ-VmokM_F24QjNpdsrPYrDT=kHO1yTCsbda-M_qaL04Myeceg@mail.gmail.com>
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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
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