While doing a bunch of 'while [ 0 ]; relocate_resource_group foo; done' simultaneously, I triggered this in the DLM: I haven't updated since last week; will do so and attempt to reproduce. This is just a heads-up. -- Lon DLM: Assertion failed on line 328 of file cluster/dlm/lockqueue.c DLM: assertion: "rsb->res_nodeid == -1 || rsb->res_nodeid == 0" DLM: time = 2154223 dlm: lkb id 200ca remid 0 flags 0 status 0 rqmode 5 grmode -1 nodeid 4294967295 lqstate 0 lqflags 0 dlm: rsb name "usrm::vf" nodeid 1 ref 2 dlm: reply rh_cmd 5 rh_lkid 200ca lockstate 0 nodeid 1 status 0 lkid c02bf515 ------------[ cut here ]------------ kernel BUG at cluster/dlm/lockqueue.c:328! invalid operand: 0000 [#1] PREEMPT SMP Modules linked in: dlm cman ipv6 CPU: 0 EIP: 0060:[<d099cd16>] Not tainted EFLAGS: 00010286 (2.6.7cman20040804) EIP is at process_lockqueue_reply+0x5e6/0x720 [dlm] eax: 00000001 ebx: 00000001 ecx: c039df74 edx: 00000282 esi: c9bbb04c edi: c9bbc708 ebp: caf55e24 esp: caf55dfc ds: 007b es: 007b ss: 0068 Process dlm_recvd (pid: 2109, threadinfo=caf54000 task=cad33360) Stack: d09ad257 00000148 d09ad23f d09ae8a0 0020deef c1398200 000200ca c9bbc708 c1398200 caf55ee0 caf55eac d099de86 c9bbc708 caf55ee0 00000001 c03b94c0 caf55f88 caf55e90 caf55e74 c030a4d4 caf55e90 00000000 00000000 00000fc4 Call Trace: [<c010718f>] show_stack+0x7f/0xa0 [<c010733e>] show_registers+0x15e/0x1c0 [<c01074f2>] die+0xa2/0x120 [<c0107955>] do_invalid_op+0xb5/0xc0 [<c0106e09>] error_code+0x2d/0x38 [<d099de86>] process_cluster_request+0x746/0xde0 [dlm] [<d09a2be7>] midcomms_process_incoming_buffer+0x167/0x250 [dlm] [<d099ffd9>] receive_from_sock+0x189/0x360 [dlm] [<d09a12c8>] process_sockets+0xd8/0x110 [dlm] [<d09a16ad>] dlm_recvd+0xad/0x110 [dlm] [<c0104455>] kernel_thread_helper+0x5/0x10 Code: 0f 0b 48 01 3f d2 9a d0 e9 0d 01 00 00 e8 e8 f0 ff ff e8 33