On occastion I get an oops similar to the one included when running 64 bit mode. To see if it was a 64 bit bug, I installed the i386 version and I got the same type of oops. Is it a hardware problem or a legitimate kernel bug? It seems like the oops always is due to a spinlock being held. I'm running Fedora Core 2 on both platforms. The nVidia module taints the kernel, so I'm going to test it without that module next to see if it makes any difference. I've also ran 1 pass of memtest86+ (1.27) and it checked out ok. I may run it all night tonight to test further. I'm only subscribed to the fedora-list@xxxxxxxxxx, so if you're reading this on another list, cc me directly! Thanks Brian Wheeler bdwheele@xxxxxxxxxxx Oct 21 04:03:00 pazuzu kernel: Unable to handle kernel paging request at virtual address 832bfde0 Oct 21 04:03:00 pazuzu kernel: printing eip: Oct 21 04:03:00 pazuzu kernel: 0213e26e Oct 21 04:03:00 pazuzu kernel: *pde = 00000000 Oct 21 04:03:00 pazuzu kernel: Oops: 0000 [#1] Oct 21 04:03:00 pazuzu kernel: Modules linked in: udf snd_pcm_oss snd_mixer_oss snd_via82xx snd_ac97_codec snd_pcm snd_timer snd_page_alloc gameport snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore nvidia(U) md5 ipv6 parport_pc lp parport autofs4 sunrpc r8169 floppy sg vfat fat joydev dm_mod uhci_hcd ehci_hcd button battery asus_acpi ac ext3 jbd sata_via libata sd_mod scsi_mod Oct 21 04:03:00 pazuzu kernel: CPU: 0 Oct 21 04:03:00 pazuzu kernel: EIP: 0060:[<0213e26e>] Tainted: P Oct 21 04:03:00 pazuzu kernel: EFLAGS: 00010087 (2.6.8-1.521) Oct 21 04:03:00 pazuzu kernel: EIP is at find_get_pages+0x9b/0x115 Oct 21 04:03:00 pazuzu kernel: eax: 2000106c ebx: 3ee97be4 ecx: 00000003 edx: 832bfde0 Oct 21 04:03:00 pazuzu kernel: esi: 00000010 edi: 00000010 ebp: 41e26f18 esp: 41e26ee0 Oct 21 04:03:00 pazuzu kernel: ds: 007b es: 007b ss: 0068 Oct 21 04:03:00 pazuzu kernel: Process kswapd0 (pid: 41, threadinfo=41e26000 task=039ec070) Oct 21 04:03:00 pazuzu kernel: Stack: 0000c493 41e26f10 00000010 0000c3b0 02148df2 41e26f18 033d0ee0 0000c493 Oct 21 04:03:00 pazuzu kernel: 021492ab 00000010 ffffffff 3ee97be4 00000000 00000000 033d0e80 031b5760 Oct 21 04:03:00 pazuzu kernel: 032bfdc0 832bfde0 035b1e80 035b1ea0 031f5ce0 031f5c60 03523440 03523460 Oct 21 04:03:00 pazuzu kernel: Call Trace: Oct 21 04:03:00 pazuzu kernel: [<02148df2>] pagevec_lookup+0x17/0x1d Oct 21 04:03:00 pazuzu kernel: [<021492ab>] invalidate_mapping_pages+0xb5/0xc8 Oct 21 04:03:00 pazuzu kernel: [<428c1f2e>] ext3_put_inode+0x0/0x16 [ext3] Oct 21 04:03:00 pazuzu kernel: [<0217eeee>] prune_icache+0x1db/0x3a3 Oct 21 04:03:00 pazuzu kernel: [<0214af4b>] kswapd+0xbf/0xca Oct 21 04:03:00 pazuzu kernel: [<0211be05>] autoremove_wake_function+0x0/0x2d Oct 21 04:03:00 pazuzu kernel: [<0211be05>] autoremove_wake_function+0x0/0x2d Oct 21 04:03:00 pazuzu kernel: [<0214ae8c>] kswapd+0x0/0xca Oct 21 04:03:00 pazuzu kernel: [<021041d9>] kernel_thread_helper+0x5/0xb Oct 21 04:03:00 pazuzu kernel: Code: 8b 02 a9 00 00 08 00 74 03 8b 52 0c ff 42 04 41 39 f1 72 e8 Oct 21 04:04:29 pazuzu kernel: mm/page-writeback.c:669: spin_lock(fs/inode.c:3ee97bf4) already locked by mm/filemap.c/578