as can be seen in the dmesg above, swap was initially on hda1. after reinitialising that partition, the problem re-ocurred. the oops was caught in /var/log/kern.log:
Apr 29 07:16:19 egan kernel: Unable to handle kernel paging request at virtual address 00100004 Apr 29 07:16:19 egan kernel: printing eip: Apr 29 07:16:19 egan kernel: c013f0a2 Apr 29 07:16:19 egan kernel: *pde = 00000000 Apr 29 07:16:19 egan kernel: Oops: 0002 [#1] Apr 29 07:16:19 egan kernel: PREEMPT Apr 29 07:16:19 egan kernel: Modules linked in: lp nfsd exportfs lockd sunrpc ipv6 pcspkr floppy parport_pc parport aic79xx pci_hotplug intel_agp uhci_hcd usbcore st aic7xxx scsi_mod e100 mii agpgart ext3 jbd mbcache evdev mousedev tsdev capability commoncap psmouse ide_cd cdrom rtc reiserfs ide_generic ide_disk piix ide_core unix font vesafb cfbcopyarea cfbimgblt cfbfillrect Apr 29 07:16:19 egan kernel: CPU: 0 Apr 29 07:16:19 egan kernel: EIP: 0060:[free_block+82/224] Not tainted Apr 29 07:16:19 egan kernel: EFLAGS: 00010016 (2.6.8-3-686) Apr 29 07:16:19 egan kernel: EIP is at free_block+0x52/0xe0 Apr 29 07:16:19 egan kernel: eax: 00100000 ebx: c7dce000 ecx: c7dce040 edx: d50e7000 Apr 29 07:16:19 egan kernel: esi: dfe3cb60 edi: 00000002 ebp: 0000001b esp: c16e7e50 Apr 29 07:16:19 egan kernel: ds: 007b es: 007b ss: 0068 Apr 29 07:16:19 egan kernel: Process kswapd0 (pid: 43, threadinfo=c16e6000 task=c16c0b70) Apr 29 07:16:19 egan kernel: Stack: dfe3cb60 cd94a000 dfe3cb7c c152a0b0 00000282 cdb8ac80 df9d6480 c013f17c Apr 29 07:16:19 egan kernel: dfe3cb60 c152a0b0 0000001b 0000001b c152a0a0 00000282 cdb8ac80 c16e6000 Apr 29 07:16:19 egan kernel: c013f497 dfe3cb60 c152a0a0 cdb8ad14 c16e7ef0 0000003e e0aea4fd dfe3cb60 Apr 29 07:16:19 egan kernel: Call Trace: Apr 29 07:16:19 egan kernel: [cache_flusharray+76/208] cache_flusharray+0x4c/0xd0 Apr 29 07:16:19 egan kernel: [kmem_cache_free+71/80] kmem_cache_free+0x47/0x50 Apr 29 07:16:19 egan kernel: [__crc_xfrm_get_type+1491455/3356969] ext3_destroy_inode+0x1d/0x30 [ext3] Apr 29 07:16:19 egan kernel: [destroy_inode+67/112] destroy_inode+0x43/0x70 Apr 29 07:16:19 egan kernel: [dispose_list+85/176] dispose_list+0x55/0xb0 Apr 29 07:16:19 egan kernel: [prune_icache+194/512] prune_icache+0xc2/0x200 Apr 29 07:16:19 egan kernel: [shrink_icache_memory+31/80] shrink_icache_memory+0x1f/0x50 Apr 29 07:16:19 egan kernel: [shrink_slab+290/400] shrink_slab+0x122/0x190 Apr 29 07:16:19 egan kernel: [balance_pgdat+608/688] balance_pgdat+0x260/0x2b0 Apr 29 07:16:19 egan kernel: [kswapd+210/240] kswapd+0xd2/0xf0 Apr 29 07:16:19 egan kernel: [autoremove_wake_function+0/96] autoremove_wake_function+0x0/0x60 Apr 29 07:16:19 egan kernel: [ret_from_fork+6/20] ret_from_fork+0x6/0x14 Apr 29 07:16:19 egan kernel: [autoremove_wake_function+0/96] autoremove_wake_function+0x0/0x60 Apr 29 07:16:19 egan kernel: [kswapd+0/240] kswapd+0x0/0xf0 Apr 29 07:16:19 egan kernel: [kernel_thread_helper+5/24] kernel_thread_helper+0x5/0x18 Apr 29 07:16:19 egan kernel: Code: 89 50 04 89 02 8b 43 0c 31 d2 c7 03 00 01 10 00 c7 43 04 00 Apr 29 07:16:19 egan kernel: <6>note: kswapd0[43] exited with preempt_count 1 given the previous comments here that the problem might be disk related, the next thing i tried was a different partition on a different disk. swap is moved hdc5, but the problem occurred again: Apr 30 06:50:11 egan kernel: Unable to handle kernel paging request at virtual address 00100004 Apr 30 06:50:11 egan kernel: printing eip: Apr 30 06:50:11 egan kernel: c013f0a2 Apr 30 06:50:11 egan kernel: *pde = 00000000 Apr 30 06:50:11 egan kernel: Oops: 0002 [#1] Apr 30 06:50:11 egan kernel: PREEMPT Apr 30 06:50:11 egan kernel: Modules linked in: lp nfsd exportfs lockd sunrpc ipv6 pcspkr floppy parport_pc parport aic79xx pci_hotplug intel_agp uhci_hcd usbcore st aic7xxx scsi_mod e100 mii agpgart ext3 jbd mbcache evdev mousedev tsdev capability commoncap psmouse ide_cd cdrom rtc reiserfs ide_generic ide_disk piix ide_core unix font vesafb cfbcopyarea cfbimgblt cfbfillrect Apr 30 06:50:11 egan kernel: CPU: 0 Apr 30 06:50:11 egan kernel: EIP: 0060:[free_block+82/224] Not tainted Apr 30 06:50:11 egan kernel: EFLAGS: 00010016 (2.6.8-3-686) Apr 30 06:50:11 egan kernel: EIP is at free_block+0x52/0xe0 Apr 30 06:50:11 egan kernel: eax: 00100000 ebx: c6183000 ecx: c6183040 edx: d6f76000 Apr 30 06:50:11 egan kernel: esi: dfe3cb60 edi: 00000007 ebp: 0000001b esp: c16e7e50 Apr 30 06:50:11 egan kernel: ds: 007b es: 007b ss: 0068 Apr 30 06:50:11 egan kernel: Process kswapd0 (pid: 43, threadinfo=c16e6000 task=c16c0b70) Apr 30 06:50:11 egan kernel: Stack: dfe3cb60 c61de000 dfe3cb7c df41d0b0 00000282 c2293c80 ded2eee0 c013f17c Apr 30 06:50:11 egan kernel: dfe3cb60 df41d0b0 0000001b 0000001b df41d0a0 00000282 c2293c80 c16e6000 Apr 30 06:50:11 egan kernel: c013f497 dfe3cb60 df41d0a0 c2293d14 c16e7ef0 00000019 e0aea4fd dfe3cb60 Apr 30 06:50:11 egan kernel: Call Trace: Apr 30 06:50:11 egan kernel: [cache_flusharray+76/208] cache_flusharray+0x4c/0xd0 Apr 30 06:50:11 egan kernel: [kmem_cache_free+71/80] kmem_cache_free+0x47/0x50 Apr 30 06:50:11 egan kernel: [__crc_xfrm_get_type+1491455/3356969] ext3_destroy_inode+0x1d/0x30 [ext3] Apr 30 06:50:11 egan kernel: [destroy_inode+67/112] destroy_inode+0x43/0x70 Apr 30 06:50:11 egan kernel: [dispose_list+85/176] dispose_list+0x55/0xb0 Apr 30 06:50:11 egan kernel: [prune_icache+194/512] prune_icache+0xc2/0x200 Apr 30 06:50:11 egan kernel: [shrink_icache_memory+31/80] shrink_icache_memory+0x1f/0x50 Apr 30 06:50:11 egan kernel: [shrink_slab+290/400] shrink_slab+0x122/0x190 Apr 30 06:50:11 egan kernel: [balance_pgdat+608/688] balance_pgdat+0x260/0x2b0 Apr 30 06:50:11 egan kernel: [kswapd+210/240] kswapd+0xd2/0xf0 Apr 30 06:50:11 egan kernel: [autoremove_wake_function+0/96] autoremove_wake_function+0x0/0x60 Apr 30 06:50:11 egan kernel: [ret_from_fork+6/20] ret_from_fork+0x6/0x14 Apr 30 06:50:11 egan kernel: [autoremove_wake_function+0/96] autoremove_wake_function+0x0/0x60 Apr 30 06:50:11 egan kernel: [kswapd+0/240] kswapd+0x0/0xf0 Apr 30 06:50:11 egan kernel: [kernel_thread_helper+5/24] kernel_thread_helper+0x5/0x18 Apr 30 06:50:11 egan kernel: Code: 89 50 04 89 02 8b 43 0c 31 d2 c7 03 00 01 10 00 c7 43 04 00 Apr 30 06:50:11 egan kernel: <6>note: kswapd0[43] exited with preempt_count 1 that seems likely to rule out problems with both the formatting of the partition, and with the physical disk, i think? is there something else i should be doing to help debug this problem? thanks, d -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". 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