Something

Bad page state in process 'ktorrent'
page:c186d0e0 flags:0x80000001 mapping:00000000 mapcount:0 count:0
Trying to fix it up, but a reboot is needed
Backtrace:
 [<c010529a>] show_trace_log_lvl+0x1a/0x30
 [<c0105f22>] show_trace+0x12/0x20
 [<c0105f96>] dump_stack+0x16/0x20
 [<c0165c36>] bad_page+0x66/0xa0
 [<c01661df>] free_hot_cold_page+0x16f/0x180
 [<c0166224>] __pagevec_free+0x34/0x40
 [<c0168d45>] release_pages+0x75/0x180
 [<c01771fd>] free_pages_and_swap_cache+0x7d/0xa0
 [<c016e715>] unmap_vmas+0x345/0x5a0
 [<c0171dc0>] unmap_region+0x90/0x120
 [<c01728b0>] do_munmap+0x140/0x1e0
 [<c017298d>] sys_munmap+0x3d/0x60
 [<c01041ba>] sysenter_past_esp+0x6b/0xa1
 =======================