Hello All, We are running GFS on RHEL4U3 (x86_64). One of our cluster nodes crashes this afternoon. We are able to capture some of the message from netdump (pasted below) before fencing killed the node. Any advice would be appreciated. Thanks, Steve lock_dlm: Assertion failed on line 357 of file /usr/src/build/714650- x86_64/BUILD/gfs-kernel-2.6.9-49/smp/src/dlm/lock.c lock_dlm: assertion: "!error" lock_dlm: time = 5441671088 HOME: error=-22 num=3,bcd97c3 lkf=9 flags=84 ----------- [cut here ] --------- [please bite here ] --------- Kernel BUG at lock:357 invalid operand: 0000 [1] SMP CPU 0 Modules linked in: lockd parport netconsole netdump lock_dlm(U)(U) dlm md5 ipv6 battery ac tg3 floppy ext3 qla2300 scsi_transport_fc scsi_mod Pid: 3221, comm: gfs_glockd Not tainted 2.6.9-34.ELsmp RSP: 0018:00000101123c1dd8 EFLAGS: 00010212 RAX: 0000000000000001 RBX: 000001004df39d80 RCX: 0000000000000246 RDX: 000000000000a997 RSI: 0000000000000246 RDI: ffffffff803d9e60 RBP: 00000000ffffffea R08: 0000000000000004 R09: 000001004df39d80 R10: 0000000000000000 R11: 00000000000000e4 R12: 00000100d4a9a974 R13: ffffff0010182000 R14: ffffffffa0264e60 R15: 00000100d4a9a948 FS: 0000002a95575b00(0000) GS:ffffffff804d7b00(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 000000000062fafc CR3: 0000000000101000 CR4: 00000000000006e0 Stack: 000001001d546c80 ffffff0010182000 00000100d4a9a948 ffffffffa0268b96 Call Trace:<ffffffffa022f97c>{:gfs:gfs_lm_unlock+41} <ffffffffa02263d9>{:gfs:gfs_glock_drop_th+290} <ffffffffa0224b7c>{:gfs:run_queue+314} <ffffffffa0224dd0>{:gfs:unlock_on_glock+37} <ffffffffa0224ec6>{:gfs:gfs_reclaim_glock+234} <ffffffffa021975a>{:gfs:gfs_glockd+61} <ffffffff801333c8>{default_wake_function+0} <ffffffff801333c8>{default_wake_function+0} <ffffffff80110e17>{child_rip+8} <ffffffff801f64af>{vgacon_cursor+0} <ffffffffa021971d>{:gfs:gfs_glockd+0} <ffffffff80110e0f>{child_rip+0} Code: 0f 0b 52 d1 26 a0 ff ff ff ff 65 01 48 c7 c7 57 d1 26 a0 31 RIP <ffffffffa0268819>{:lock_dlm:do_dlm_unlock+167} RSP <00000101123c1dd8> -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster