Bad page state at free_hot_cold_page

Greetings,
(I'm posting this to LKML and CK because I'm not sure if any of 2.6.15-ck1's
changes might cause this scenario)
Recently I've noticed that after my desktop has been up for a while, my music
playback / mouse cursor movement will on occasion pause briefly. I got
frustrated with it a minute ago and decided to kill artsd, wondering if there
could be issues with both arts and amarok's backend holding the audio device
open at once.
When running killall artsd, I locked up for a second and found this in dmesg:

Bad page state at free_hot_cold_page (in process 'artsd', page b1761620)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761640)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761660)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761680)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b17616a0)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b17616c0)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b17616e0)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761700)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761720)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761740)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761760)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b1761780)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b17617a0)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b05b6901>] _spin_unlock_irqrestore+0xf/0x23
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b17617c0)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed
Bad page state at free_hot_cold_page (in process 'artsd', page b17617e0)
flags:0x80000404 mapping:00000000 mapcount:0 count:0
Backtrace:
[<b0148e9a>] bad_page+0x84/0xbc
[<b0149699>] free_hot_cold_page+0x65/0x13a
[<b0153bf1>] zap_pte_range+0x1d1/0x28f
[<b0153d70>] unmap_page_range+0xc1/0x122
[<b0153ebe>] unmap_vmas+0xed/0x242
[<b0158099>] unmap_region+0xb4/0x156
[<b01583e2>] do_munmap+0x108/0x144
[<b015846f>] sys_munmap+0x51/0x76
[<b0102eff>] sysenter_past_esp+0x54/0x75
Trying to fix it up, but a reboot is needed

Any thoughts? Further diagnostics?

Thanks,
Chase
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