Loglevel set to 9
hmm.. 289 ms
hmm.. 6 ms
hmm.. 4 ms
hmm.. 7 ms
hmm.. 13 ms
hmm.. 15 ms
Unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c0114d0a
*pde = 00000000
Oops: 0002 [#1]
CPU:    0
EIP:    0060:[<c0114d0a>]    Not tainted VLI
EFLAGS: 00010006
EIP is at try_to_wake_up+0x1e2/0x258
eax: 00000008   ebx: c02cb3c8   ecx: c0dcf360   edx: c0dcf360
esi: c0c24000   edi: 00000000   ebp: c0c25ed4   esp: c0c25eb8
ds: 007b   es: 007b   ss: 0068
Process gcc (pid: 592, threadinfo=c0c24000 task=c0dcf360)
Stack: 00000001 00000001 c0298ff4 c0c25ed0 00000001 00000001 00000002 c0c25ee8 
       c0115887 c7b8a0a0 00000003 00000000 c0c25f08 c01158c2 c2d81e5c 00000003 
       00000000 c0c24000 00000082 c0298fe8 c0c25f20 c011594a c0298ff0 00000003 
Call Trace:
 [<c0115887>] default_wake_function+0x17/0x1c
 [<c01158c2>] __wake_up_common+0x36/0x50
 [<c011594a>] __wake_up_locked+0xe/0x14
 [<c0107cdc>] __down_trylock+0x34/0x54
 [<c0107d1b>] __down_failed_trylock+0x7/0xc
 [<c011928b>] .text.lock.printk+0x5/0x2a
 [<c01155f0>] schedule+0x13c/0x378
 [<c011ab07>] sys_wait4+0xab/0x234
 [<c011ac5d>] sys_wait4+0x201/0x234
 [<c0115870>] default_wake_function+0x0/0x1c
 [<c0115870>] default_wake_function+0x0/0x1c
 [<c0108b5f>] syscall_call+0x7/0xb

Code: ff 48 14 8b 40 08 a8 08 74 07 e8 3e 0b 00 00 89 f6 85 f6 74 7e 8b 55 f0 9c 8f 02 fa be 00 e0 ff ff 21 e6 ff 46 14 8b 16 8b 7a 28 <ff> 0f 8b 42 20 8b 4a 24 89 48 04 89 01 8b 52 18 8d 44 d7 18 39 

 (gdb) list *try_to_wake_up+0x1e2
 0x26a is in try_to_wake_up (kernel/sched.c:310).
 305     /*
 306      * Adding/removing a task to/from a priority array:
 307      */
 308     static inline void dequeue_task(struct task_struct *p, prio_array_t *array)
 309     {
 310             array->nr_active--;
 311             list_del(&p->run_list);
 312             if (list_empty(array->queue + p->prio))
 313                     __clear_bit(p->prio, array->bitmap);
 314     }
 (gdb)
 <6>note: gcc[592] exited with preempt_count 5
bad: scheduling while atomic!
Call Trace:
 [<c01154f0>] schedule+0x3c/0x378
 [<c0134b26>] unmap_vmas+0xea/0x1e0
 [<c011647b>] __cond_resched+0x17/0x1c
 [<c0134b86>] unmap_vmas+0x14a/0x1e0
 [<c0137fb8>] exit_mmap+0x64/0x158
 [<c0116dbd>] mmput+0x55/0x74
 [<c011a368>] do_exit+0x158/0x3b4
 [<c0109267>] die+0x87/0x88
 [<c0114068>] do_page_fault+0x2d8/0x404
 [<c0113d90>] do_page_fault+0x0/0x404
 [<c011b91a>] do_softirq+0x5a/0xac
 [<c010a170>] do_IRQ+0xfc/0x118
 [<c012e173>] __rmqueue+0xa3/0x10c
 [<c012e21f>] rmqueue_bulk+0x43/0x6c
 [<c0108d69>] error_code+0x2d/0x38
 [<c0114d0a>] try_to_wake_up+0x1e2/0x258
 [<c0115887>] default_wake_function+0x17/0x1c
 [<c01158c2>] __wake_up_common+0x36/0x50
 [<c011594a>] __wake_up_locked+0xe/0x14
 [<c0107cdc>] __down_trylock+0x34/0x54
 [<c0107d1b>] __down_failed_trylock+0x7/0xc
 [<c011928b>] .text.lock.printk+0x5/0x2a
 [<c01155f0>] schedule+0x13c/0x378
 [<c011ab07>] sys_wait4+0xab/0x234
 [<c011ac5d>] sys_wait4+0x201/0x234
 [<c0115870>] default_wake_function+0x0/0x1c
 [<c0115870>] default_wake_function+0x0/0x1c
 [<c0108b5f>] syscall_call+0x7/0xb

hmm.. 42 ms
hmm.. 24 ms
hmm.. 33 ms
hmm.. 23 ms
hmm.. 31 ms
hmm.. 30 ms
hmm.. 30 ms