db> bt 1036
Tracing pid 1036 tid 100075 td 0xcec25000
0xce47abf0: at mi_switch+0x338
0xce47ac20: at sleepq_signal+0x40c
0xce47ac50: at sleepq_wait+0x88
0xce47ac80: at lockmgr_chain+0x550
0xce47ad00: at __lockmgr_args+0x318
0xce47ad90: at syncer_resume+0x1bc
0xce47adf0: at vtruncbuf+0x108
0xce47ae50: at ncl_meta_setsize+0xd0
0xce47ae90: at ncl_writerpc+0x3f4
0xce47afa0: at vop_sigdefer+0xbc
0xce47afd0: at nfsrpc_setacl+0x11c
0xce47aff0: at VOP_SETATTR_APV+0x150
0xce47b010: at ncl_write+0x1168
0xce47b190: at vop_sigdefer+0xbc
0xce47b1c0: at nfsrpc_setacl+0x11c
0xce47b1e0: at VOP_WRITE_APV+0x1d4
0xce47b2c0: at vn_utimes_perm+0x1ec
0xce47b310: at vn_utimes_perm+0x3c8
0xce47b3e0: at vn_rdwr+0x1f0
0xce47b480: at vn_rdwr_inchunks+0x104
0xce47b500: at elf32_populate_note+0x10d8
0xce47b530: at elf32_coredump+0x798
0xce47b5e0: at sigexit+0xa44
0xce47b970: at postsig+0x1c0
0xce47ba10: at ast+0x3c8
0xce47ba40: user DSI write trap @ 0x4 by 0x419ebf28: srr1=0x202d000
            r1=0x7fffd6b0 cr=0x22828a80 xer=0 ctr=0x41a2b7d0 sr=0x800000 frame=0xce47ba48