Hi, When I trying to setup GFS on two node. some times it triggers the kdb and the mount hangs. Follow is the dmesg and config file. I use kernel 2.6.6up no preemption with kdb patch. two nodes are both DELL desktop with Intel P3 and P4 CPU. Is this a know issue? ------------------------------------------------------------------------ --------------------------------------------------- Unable to handle kernel NULL pointer dereference at virtual address 00000046 printing eip: d087c916 *pde = 00000000 Oops: 0000 [#1] CPU: 0 EIP: 0060:[<d087c916>] Not tainted EFLAGS: 00010286 (2.6.6kdb) EIP is at send_to_sock+0x41/0x20a [dlm] eax: 00000002 ebx: c763c060 ecx: 00000000 edx: 00000000 esi: d089124c edi: c763c060 ebp: 00000000 esp: c7007f88 ds: 007b es: 007b ss: 0068 Process dlm_sendd (pid: 19895, threadinfo=c7006000 task=caeaa7b0) Stack: d0887851 0000002b c7007fb0 c011475f c994bc68 c12a31b0 c763c068 00000286 c763c060 d089124c c7006000 00000002 d087cce0 c763c060 c7006000 00000000 00000000 00000000 d087cfda d0887905 00000000 00000000 0000007b 0000007b Call Trace: [<c011475f>] __wake_up_common+0x31/0x50 [<d087cce0>] process_output_queue+0x55/0x75 [dlm] [<d087cfda>] dlm_sendd+0x95/0xe9 [dlm] [<d087cf45>] dlm_sendd+0x0/0xe9 [dlm] [<c0104291>] kernel_thread_helper+0x5/0xb Code: 8b 40 44 89 44 24 1c 8d 47 30 89 44 24 14 8b 5f 30 3b 5c 24 <6>CMAN: Being told to leave the cluster by node 2 CMAN: we are leaving the cluster SM: 00000001 sm_stop: SG still joined SM: 01000002 sm_stop: SG still joined input: AT Translated Set 2 keyboard on isa0060/serio0 my config file. ---------------------------------------------------------------- <?xml version="1.0"?> <cluster name="god" config_version="1"> <cman two_node="1" expected_votes="1"> </cman> <nodes> <node name="xling" votes="1"> <fence> <method name="human"> <device name="last_resort"/> </method> </fence> </node> <node name="ocfs2" votes="1"> <fence> <method name="human"> <device name="last_resort"/> </method> </fence> </node> </nodes> <fence_device> <device name="last_resort" agent="fence_manual"/> </fence_device> </cluster> ------------------- Ling Xiaofeng(Daniel) Intel China Software Lab. iNet: 8-752-1243 8621-52574545-1243(O) xfling@xxxxxxxxxxxxxxxxxxxxx Opinions are my own and don't represent those of my employer