Hi, We have got a Fujitsu-Siemens Celsius V830 runnung under SuSE 10. When running the Gaussian application it crashes at link changes (forking a new executable but retaining the same PID). The error cannot be reproduced, it may or may not occur and not in a specific place in the application. It seems it is related to a kernel bug. The machine details are: Fujitsu-Siemens Celsius V830 ----Gigabyte GA-2CEWH ----NVIDIA GeForce 6200 TC 128MB Dual DVI-I ----DVD-ROM 16x48x ATAPI ----2xOpteron 275 2.2GHz (dual core) ----8x2GB DDR333 rg ECC (Infineon CL2.5 ECC Reg) ----2xHDD SATA II 250GB 7.2k (WD Caviar, 2500) BIOS is 1.05.1818, NUMA enabled, but the behavior is the same when NUMA is disabled in BIOS. Sometimes, but not always, the following type of message appears in the syslog: Kernel BUG at "fs/exec.c":788 invalid operand: 0000 [1] SMP CPU 1 Modules linked in: ipt_pkttype ipt_LOG ipt_limit cpufreq_ondemand cpufreq_usersp ace cpufreq_powersave powernow_k8 freq_table snd_pcm_oss snd_mixer_oss button sn d_seq battery snd_seq_device ac nvidia af_packet edd ide_cd cdrom snd_intel8x0 s nd_ac97_codec tg3 snd_ac97_bus snd_pcm pci_hotplug ohci1394 ieee1394 snd_timer f orcedeth ohci_hcd snd ehci_hcd usbcore i2c_nforce2 i2c_core soundcore generic sn d_page_alloc parport_pc lp parport ip6t_REJECT ipt_REJECT ipt_state iptable_mang le iptable_nat iptable_filter ip6table_mangle ip_conntrack ip_tables ip6table_fi lter ip6_tables ipv6 dm_mod raid0 reiserfs fan thermal processor sg sata_nv liba ta amd74xx sd_mod scsi_mod ide_disk ide_core Pid: 10403, comm: l502.exe Tainted: P U 2.6.13-15.7-smp RIP: 0010:[<ffffffff80198368>] <ffffffff80198368>{flush_old_exec+1608} RSP: 0018:ffff810438b29ca8 EFLAGS: 00010283 RAX: ffff81007fe2d7d0 RBX: 0000000000000001 RCX: ffff81007fe2d640 RDX: ffff81007fe2d640 RSI: ffff810258a98680 RDI: ffff810037d77ac0 RBP: ffff810440e0e840 R08: ffff810438b28000 R09: 0000000000000001 R10: 000000000000003f R11: ffffffff804861c8 R12: 0000000000000003 R13: ffff810258af6100 R14: ffff810258af6908 R15: ffff810258b52200 FS: 00002aaab1db20a0(0000) GS:ffffffff8050e880(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000508e30 CR3: 000000042de73000 CR4: 00000000000006e0 Process l502.exe (pid: 10403, threadinfo ffff810438b28000, task ffff81007fe2d640) Stack: ffff81044fd3cad0 ffff810258a98680 0000000000000080 0000000000000001 ffff81044e71b1f0 ffff810258b52200 000000009fd0f8c0 ffffffff8018c876 ffff810000000000 ffff810258b52200 Call Trace:<ffffffff8018c876>{vfs_read+342} <ffffffff801bb9e6>{load_elf_binary+1254} <ffffffff8016be16>{buffered_rmqueue+534} <ffffffff801bb500>{load_elf_binary+0} <ffffffff80198903>{search_binary_handler+195} <ffffffff80198ca3>{do_execve+467} <ffffffff8010ed7e>{system_call+126} <ffffffff8010cfb4>{sys_execve+68} <ffffffff8010f19e>{stub_execve+106} Code: 0f 0b a3 c9 06 38 80 ff ff ff ff c2 14 03 65 48 8b 04 25 00 RIP <ffffffff80198368>{flush_old_exec+1608} RSP <ffff810438b29ca8> Any help is welcome. Best wishes, Ödön -- ------------------------------------- Odon Farkas Department of Organic Chemistry, Eotvos Lorand University, P.O.Box 32 Budapest 112.,H-1518 E-mail: farkas@chem.elte.hu URL: http://organ.elte.hu/farkas Phone: (36)-(1)-209-0555, ext. 1325 (36)-(1)-372-2570 (36)-(30)-255-3111 FAX: (36)-(1)-209-0602 (36)-(1)-372-2620 -------------------------------------