[... kdb and dump machinery is snipped ...] #9 0xc068a5a4 in panic ( fmt=0xc092ed44 "%s: recursing on non recursive lockmgr %s @ %s:%s\n") at ../../../kern/kern_shutdown.c:599 #10 0xc0672391 in __lockmgr_args (lk=0xc6cfd278, flags="Variable "flags" is not available. ) at ../../kern/kern_lock.c:727 #11 0xc0612767 in null_reclaim (ap=0xf232a5e4) at lockmgr.h:97 #12 0xc09eec52 in VOP_RECLAIM_APV (vop=0xc0983b80, a=0xf232a5e4) at vnode_if.c:1926 #13 0xc071cd44 in vgonel (vp=0xc6cfd220) at vnode_if.h:830 #14 0xc0720645 in vrecycle (vp=0xc6cfd220, td=0xc6a80000) at ../../../kern/vfs_subr.c:2576 #15 0xc0612175 in null_inactive (ap=0xf232a664) at ../../../fs/nullfs/null_vnops.c:691 #16 0xc08eebc2 in VOP_INACTIVE_APV (vop=0xc0983b80, a=0xf232a664) at vnode_if.c:1863 #17 0xc071b3bf in vinactive (vp=0xc6cfd220, td=0xc6a80000) at vnode_if.h:807 #18 0xc0721423 in vputx (vp=0xc6cfd220, func=1) at ../../../kern/vfs_subr.c:2297 #19 0xc0721b80 in vrele (vp=0xc6cfd220) at ../../../kern/vfs_subr.c:2312 #20 0xc06117c3 in null_nodeget (mp=0xc6532288, lowervp=0xc6ae0000, vpp=0xf232a998) at ../../../fs/nullfs/null_subr.c:249 #21 0xc0611acb in nullfs_vfet (mp=0xc6532288, ino=53444451, flags=2097152, vpp=0xf232a998) at ../../../fs/nullfs/null_vfsops.c:315 #22 0xc060dd21 in nfsrvd_readdirplus (nd=0xf232ab88, isdgram=1, vp=0xc6ca4990, p=0xc6a80000, exp=0xf232aa8c) at ../../../fs/nfsserver/nfs_nfsdport.c:2021 #23 0xc05ef0b1 in nfsrvd_dorpc (nd=0xf232ab88, isdgram=1, p=0xc6a80000) at ../../../fs/nfsserver/nfs_nfsdsocket.c:440 #24 0xc05fc79d in nfssvc_program (rqst=0xc6c6e800, xprt=0xc6a93600) at ../../../fs/nfsserver/nfs_nfsdkrpc.c:328 #25 0xc080624f in svc_run_internal (pool=0xc63f8600, ismaster=0) at ../../../rpc/svr.c:895 [... the rest is snipped ...]