It is possible that I am facing this issue too. I am running Jaunty (kernel 2.6.28-11-generic). I have a mdadm based raid too. 

Here's the dump from /var/log/kern.log that I also posted in: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/367389/comments/2

==================================================================
Apr 28 14:37:32 cellar kernel: [67396.314920] BUG: unable to handle kernel paging request at 01040424
Apr 28 14:37:32 cellar kernel: [67396.314929] IP: [<c02c85cb>] prio_tree_insert+0x14b/0x290
Apr 28 14:37:32 cellar kernel: [67396.314940] *pde = 00000000 
Apr 28 14:37:32 cellar kernel: [67396.314945] Oops: 0000 [#1] SMP 
Apr 28 14:37:32 cellar kernel: [67396.314949] last sysfs file: /sys/devices/pci0000:00/0000:00:1d.7/usb1/idVendor
Apr 28 14:37:32 cellar kernel: [67396.314955] Dumping ftrace buffer:
Apr 28 14:37:32 cellar kernel: [67396.314960]    (ftrace buffer empty)
Apr 28 14:37:32 cellar kernel: [67396.314962] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 14:37:32 cellar kernel: [67396.315019] 
Apr 28 14:37:32 cellar kernel: [67396.315024] Pid: 27554, comm: kio_http_cache_ Tainted: P           (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 14:37:32 cellar kernel: [67396.315027] EIP: 0060:[<c02c85cb>] EFLAGS: 00010202 CPU: 0
Apr 28 14:37:32 cellar kernel: [67396.315031] EIP is at prio_tree_insert+0x14b/0x290
Apr 28 14:37:32 cellar kernel: [67396.315034] EAX: ee5b6e3c EBX: 01040404 ECX: f197634c EDX: 010403e0
Apr 28 14:37:32 cellar kernel: [67396.315037] ESI: 00000020 EDI: 00000001 EBP: f110deb8 ESP: f110de90
Apr 28 14:37:32 cellar kernel: [67396.315039]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 14:37:32 cellar kernel: [67396.315043] Process kio_http_cache_ (pid: 27554, ti=f110c000 task=f1114b60 task.ti=f110c000)
Apr 28 14:37:32 cellar kernel: [67396.315045] Stack:
Apr 28 14:37:32 cellar kernel: [67396.315047]  f267a3ec f197634c 00000116 00000118 000433a8 00000000 ee5b6e3c f267a3ec
Apr 28 14:37:32 cellar kernel: [67396.315056]  f267a3c8 ee4e5800 f110dec8 c019bb92 f267a3c8 f1976334 f110ded8 c01a3cc9
Apr 28 14:37:32 cellar kernel: [67396.315065]  f267a3c8 f1976334 f110def8 c01a4373 ee8559c0 ee8559b8 f0227aa8 ee8559b8
Apr 28 14:37:32 cellar kernel: [67396.315074] Call Trace:
Apr 28 14:37:32 cellar kernel: [67396.315077]  [<c019bb92>] ? vma_prio_tree_insert+0x22/0xc0
Apr 28 14:37:32 cellar kernel: [67396.315084]  [<c01a3cc9>] ? __vma_link_file+0x49/0x80
Apr 28 14:37:32 cellar kernel: [67396.315088]  [<c01a4373>] ? vma_link+0x63/0x90
Apr 28 14:37:32 cellar kernel: [67396.315092]  [<c01a5a49>] ? mmap_region+0x489/0x4e0
Apr 28 14:37:32 cellar kernel: [67396.315097]  [<c01a5d09>] ? do_mmap_pgoff+0x269/0x360
Apr 28 14:37:32 cellar kernel: [67396.315101]  [<c01084bd>] ? sys_mmap2+0xad/0xc0
Apr 28 14:37:32 cellar kernel: [67396.315106]  [<c0104062>] ? syscall_call+0x7/0xb
Apr 28 14:37:32 cellar kernel: [67396.315110]  [<c0500000>] ? relay_hotcpu_callback+0x6d/0xbd
Apr 28 14:37:32 cellar kernel: [67396.315117] Code: 8d 48 ff be 01 00 00 00 d3 e6 85 f6 0f 84 17 01 00 00 8b 4d d8 66 85 ff c7 45 ec 00 00 00 00 89 4d f0 74 77 8d 74 26 00 8d 53 dc <8b> 42 44 89 45 e8 8b 42 08 2b 42 04 8b 55 e8 c1 e8 0c 8d 7c 02 
Apr 28 14:37:32 cellar kernel: [67396.315167] EIP: [<c02c85cb>] prio_tree_insert+0x14b/0x290 SS:ESP 0068:f110de90
Apr 28 14:37:32 cellar kernel: [67396.315174] ---[ end trace a26021ceb38a2b6e ]---
Apr 28 14:51:09 cellar kernel: [68213.102886] possible SYN flooding on port 41120. Sending cookies.
Apr 28 14:53:29 cellar kernel: [68353.332498] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 14:53:29 cellar kernel: [68353.332502] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 14:53:29 cellar kernel: [68353.332504] 
Apr 28 14:53:29 cellar kernel: [68353.332504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 14:53:29 cellar kernel: [68353.332504] EIP: 0060:[<c0122c43>] EFLAGS: 00000297 CPU: 1
Apr 28 14:53:29 cellar kernel: [68353.332504] EIP is at __ticket_spin_lock+0x13/0x20
Apr 28 14:53:29 cellar kernel: [68353.332504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 14:53:29 cellar kernel: [68353.332504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 14:53:29 cellar kernel: [68353.332504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 14:53:29 cellar kernel: [68353.332504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 14:53:29 cellar kernel: [68353.332504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 14:53:29 cellar kernel: [68353.332504] DR6: ffff0ff0 DR7: 00000400
Apr 28 14:53:29 cellar kernel: [68353.332504] Call Trace:
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 14:53:29 cellar kernel: [68353.332504]  [<c0105477>] kernel_thread_helper+0x7/0x10
Apr 28 14:54:35 cellar kernel: [68418.832495] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 14:54:35 cellar kernel: [68418.832498] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 14:54:35 cellar kernel: [68418.832504] 
Apr 28 14:54:35 cellar kernel: [68418.832504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 14:54:35 cellar kernel: [68418.832504] EIP: 0060:[<c0122c43>] EFLAGS: 00000297 CPU: 1
Apr 28 14:54:35 cellar kernel: [68418.832504] EIP is at __ticket_spin_lock+0x13/0x20
Apr 28 14:54:35 cellar kernel: [68418.832504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 14:54:35 cellar kernel: [68418.832504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 14:54:35 cellar kernel: [68418.832504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 14:54:35 cellar kernel: [68418.832504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 14:54:35 cellar kernel: [68418.832504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 14:54:35 cellar kernel: [68418.832504] DR6: ffff0ff0 DR7: 00000400
Apr 28 14:54:35 cellar kernel: [68418.832504] Call Trace:
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 14:54:35 cellar kernel: [68418.832504]  [<c0105477>] kernel_thread_helper+0x7/0x10
Apr 28 14:55:40 cellar kernel: [68484.328495] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 14:55:40 cellar kernel: [68484.328497] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 14:55:40 cellar kernel: [68484.328504] 
Apr 28 14:55:40 cellar kernel: [68484.328504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 14:55:40 cellar kernel: [68484.328504] EIP: 0060:[<c0122c43>] EFLAGS: 00000297 CPU: 1
Apr 28 14:55:40 cellar kernel: [68484.328504] EIP is at __ticket_spin_lock+0x13/0x20
Apr 28 14:55:40 cellar kernel: [68484.328504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 14:55:40 cellar kernel: [68484.328504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 14:55:40 cellar kernel: [68484.328504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 14:55:40 cellar kernel: [68484.328504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 14:55:40 cellar kernel: [68484.328504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 14:55:40 cellar kernel: [68484.328504] DR6: ffff0ff0 DR7: 00000400
Apr 28 14:55:40 cellar kernel: [68484.328504] Call Trace:
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 14:55:40 cellar kernel: [68484.328504]  [<c0105477>] kernel_thread_helper+0x7/0x10
Apr 28 14:56:46 cellar kernel: [68549.828495] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 14:56:46 cellar kernel: [68549.828498] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 14:56:46 cellar kernel: [68549.828504] 
Apr 28 14:56:46 cellar kernel: [68549.828504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 14:56:46 cellar kernel: [68549.828504] EIP: 0060:[<c0122c43>] EFLAGS: 00000297 CPU: 1
Apr 28 14:56:46 cellar kernel: [68549.828504] EIP is at __ticket_spin_lock+0x13/0x20
Apr 28 14:56:46 cellar kernel: [68549.828504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 14:56:46 cellar kernel: [68549.828504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 14:56:46 cellar kernel: [68549.828504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 14:56:46 cellar kernel: [68549.828504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 14:56:46 cellar kernel: [68549.828504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 14:56:46 cellar kernel: [68549.828504] DR6: ffff0ff0 DR7: 00000400
Apr 28 14:56:46 cellar kernel: [68549.828504] Call Trace:
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 14:56:46 cellar kernel: [68549.828504]  [<c0105477>] kernel_thread_helper+0x7/0x10
Apr 28 14:57:51 cellar kernel: [68615.324495] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 14:57:51 cellar kernel: [68615.324498] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 14:57:51 cellar kernel: [68615.324504] 
Apr 28 14:57:51 cellar kernel: [68615.324504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 14:57:51 cellar kernel: [68615.324504] EIP: 0060:[<c0122c41>] EFLAGS: 00000297 CPU: 1
Apr 28 14:57:51 cellar kernel: [68615.324504] EIP is at __ticket_spin_lock+0x11/0x20
Apr 28 14:57:51 cellar kernel: [68615.324504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 14:57:51 cellar kernel: [68615.324504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 14:57:51 cellar kernel: [68615.324504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 14:57:51 cellar kernel: [68615.324504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 14:57:51 cellar kernel: [68615.324504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 14:57:51 cellar kernel: [68615.324504] DR6: ffff0ff0 DR7: 00000400
Apr 28 14:57:51 cellar kernel: [68615.324504] Call Trace:
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 14:57:51 cellar kernel: [68615.324504]  [<c0105477>] kernel_thread_helper+0x7/0x10
Apr 28 14:58:57 cellar kernel: [68680.824494] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 14:58:57 cellar kernel: [68680.824497] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 14:58:57 cellar kernel: [68680.824504] 
Apr 28 14:58:57 cellar kernel: [68680.824504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 14:58:57 cellar kernel: [68680.824504] EIP: 0060:[<c0122c43>] EFLAGS: 00000297 CPU: 1
Apr 28 14:58:57 cellar kernel: [68680.824504] EIP is at __ticket_spin_lock+0x13/0x20
Apr 28 14:58:57 cellar kernel: [68680.824504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 14:58:57 cellar kernel: [68680.824504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 14:58:57 cellar kernel: [68680.824504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 14:58:57 cellar kernel: [68680.824504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 14:58:57 cellar kernel: [68680.824504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 14:58:57 cellar kernel: [68680.824504] DR6: ffff0ff0 DR7: 00000400
Apr 28 14:58:57 cellar kernel: [68680.824504] Call Trace:
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 14:58:57 cellar kernel: [68680.824504]  [<c0105477>] kernel_thread_helper+0x7/0x10
Apr 28 15:00:02 cellar kernel: [68746.320494] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 15:00:02 cellar kernel: [68746.320497] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 15:00:02 cellar kernel: [68746.320504] 
Apr 28 15:00:02 cellar kernel: [68746.320504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 15:00:02 cellar kernel: [68746.320504] EIP: 0060:[<c0122c43>] EFLAGS: 00000297 CPU: 1
Apr 28 15:00:02 cellar kernel: [68746.320504] EIP is at __ticket_spin_lock+0x13/0x20
Apr 28 15:00:02 cellar kernel: [68746.320504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 15:00:02 cellar kernel: [68746.320504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 15:00:02 cellar kernel: [68746.320504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 15:00:02 cellar kernel: [68746.320504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 15:00:02 cellar kernel: [68746.320504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 15:00:02 cellar kernel: [68746.320504] DR6: ffff0ff0 DR7: 00000400
Apr 28 15:00:02 cellar kernel: [68746.320504] Call Trace:
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 15:00:02 cellar kernel: [68746.320504]  [<c0105477>] kernel_thread_helper+0x7/0x10
Apr 28 15:01:08 cellar kernel: [68811.820494] BUG: soft lockup - CPU#1 stuck for 61s! [kswapd0:32]
Apr 28 15:01:08 cellar kernel: [68811.820497] Modules linked in: bridge stp bnep vboxnetflt vboxdrv input_polldev video output reiserfs lp snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device iTCO_wdt iTCO_vendor_support snd psmouse soundcore ppdev serio_raw pcspkr usblp snd_page_alloc btusb nvidia(P) intel_agp parport_pc parport agpgart usbhid r8169 mii raid10 raid456 async_xor async_memcpy async_tx xor raid1 raid0 multipath linear fbcon tileblit font bitblit softcursor [last unloaded: uinput]
Apr 28 15:01:08 cellar kernel: [68811.820504] 
Apr 28 15:01:08 cellar kernel: [68811.820504] Pid: 32, comm: kswapd0 Tainted: P      D    (2.6.28-11-generic #42-Ubuntu) MS-7176
Apr 28 15:01:08 cellar kernel: [68811.820504] EIP: 0060:[<c0122c43>] EFLAGS: 00000297 CPU: 1
Apr 28 15:01:08 cellar kernel: [68811.820504] EIP is at __ticket_spin_lock+0x13/0x20
Apr 28 15:01:08 cellar kernel: [68811.820504] EAX: f197635c EBX: f1976334 ECX: 00000000 EDX: 0000a4a3
Apr 28 15:01:08 cellar kernel: [68811.820504] ESI: 00000091 EDI: 00000000 EBP: f677dda4 ESP: f677dda4
Apr 28 15:01:08 cellar kernel: [68811.820504]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 28 15:01:08 cellar kernel: [68811.820504] CR0: 8005003b CR2: b8051000 CR3: 007bc000 CR4: 00000690
Apr 28 15:01:08 cellar kernel: [68811.820504] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
Apr 28 15:01:08 cellar kernel: [68811.820504] DR6: ffff0ff0 DR7: 00000400
Apr 28 15:01:08 cellar kernel: [68811.820504] Call Trace:
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c0502cf8>] _spin_lock+0x8/0x10
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c01a7986>] page_referenced_file+0x36/0xc0
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c01a7a6e>] page_referenced+0x5e/0x140
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c0199c9c>] shrink_active_list+0xdc/0x3c0
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c0195467>] ? get_dirty_limits+0x17/0x300
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c019a97d>] shrink_list+0x4d/0xb0
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c019aa9e>] shrink_zone+0xbe/0x1b0
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c019b4b5>] balance_pgdat+0x455/0x470
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c0199800>] ? isolate_pages_global+0x0/0x70
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c014ef0a>] ? prepare_to_wait+0x3a/0x70
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c019b591>] kswapd+0xc1/0x110
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c014ecb0>] ? autoremove_wake_function+0x0/0x50
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c019b4d0>] ? kswapd+0x0/0x110
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c014e90c>] kthread+0x3c/0x70
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c014e8d0>] ? kthread+0x0/0x70
Apr 28 15:01:08 cellar kernel: [68811.820504]  [<c0105477>] kernel_thread_helper+0x7/0x10
=============================================================