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SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0
Ingo Molnar wrote:

>i have released the -V0 Real-Time Preemption patch, which can be
>downloaded from:
>
> http://redhat.com/~mingo/realtime-preempt/
>
>

I'am facing three different BUG messages :


Oct 26 01:32:46 tigre02 kernel: BUG: sleeping function called from
invalid context kpnpbiosd(229) at kernel/mutex.c:28
Oct 26 01:32:46 tigre02 kernel: in_atomic():1 [00000001], irqs_disabled():0
Oct 26 01:32:46 tigre02 kernel: [<c0121c4a>] __might_sleep+0xca/0xe0 (12)
Oct 26 01:32:46 tigre02 kernel: [<c013e268>] _mutex_lock+0x38/0x50 (36)
Oct 26 01:32:46 tigre02 kernel: [<c013e2d6>]
_mutex_lock_irqsave+0x16/0x20 (24)
Oct 26 01:32:46 tigre02 kernel: [<c02e5237>]
pnp_bios_dock_station_info+0x97/0x1f0 (12)
Oct 26 01:32:46 tigre02 kernel: [<c02e4371>] pnp_dock_thread+0x81/0x100
(48)
Oct 26 01:32:46 tigre02 kernel: [<c02e42f0>] pnp_dock_thread+0x0/0x100 (16)
Oct 26 01:32:46 tigre02 kernel: [<c01033f9>]
kernel_thread_helper+0x5/0xc (16)
Oct 26 01:32:46 tigre02 kernel: preempt count: 00000002
Oct 26 01:32:46 tigre02 kernel: . 2-level deep critical section nesting:
Oct 26 01:32:46 tigre02 kernel: .. entry 1:
pnp_bios_dock_station_info+0x4f/0x1f0 [<c02e51ef>] /
(pnp_dock_thread+0x81/0x100 [<c02e4371>])
Oct 26 01:32:46 tigre02 kernel: .. entry 2: print_traces+0x1d/0x60
[<c013fa7d>] / (dump_stack+0x23/0x30 [<c01064d3>])
Oct 26 01:32:46 tigre02 kernel:

Oct 26 01:32:45 tigre02 kernel: BUG: using smp_processor_id() in
preemptible [00000001] code: usb.agent/1479
Oct 26 01:32:45 tigre02 kernel: caller is store_stackinfo+0x5d/0xb0
Oct 26 01:32:45 tigre02 kernel: [<c011f0d7>] smp_processor_id+0xb7/0xc0
(12)
Oct 26 01:32:45 tigre02 kernel: [<c0158fcd>] store_stackinfo+0x5d/0xb0 (8)
Oct 26 01:32:45 tigre02 kernel: [<c0158fcd>] store_stackinfo+0x5d/0xb0 (24)
Oct 26 01:32:45 tigre02 kernel: [<c015ac1a>]
cache_free_debugcheck+0x1aa/0x390 (28)
Oct 26 01:32:45 tigre02 kernel: [<c018446e>] __user_walk+0x5e/0x80 (12)
Oct 26 01:32:45 tigre02 kernel: [<c015bba3>] kmem_cache_free+0x33/0xf0 (4)
Oct 26 01:32:45 tigre02 kernel: [<c0116454>] mcount+0x14/0x18 (8)
Oct 26 01:32:45 tigre02 kernel: [<c015bbb6>] kmem_cache_free+0x46/0xf0 (28)
Oct 26 01:32:45 tigre02 kernel: [<c018446e>] __user_walk+0x5e/0x80 (12)
Oct 26 01:32:45 tigre02 kernel: [<c018446e>] __user_walk+0x5e/0x80 (20)
Oct 26 01:32:45 tigre02 kernel: [<c017e323>] vfs_stat+0x23/0x60 (32)
Oct 26 01:32:45 tigre02 kernel: [<c013e8cd>] __mcount+0x1d/0x30 (56)
Oct 26 01:32:45 tigre02 kernel: [<c017eaae>] sys_stat64+0xe/0x50 (4)
Oct 26 01:32:45 tigre02 kernel: [<c0105541>]
sysenter_past_esp+0x52/0x71 (4)
Oct 26 01:32:45 tigre02 kernel: [<c0116454>] mcount+0x14/0x18 (8)
Oct 26 01:32:45 tigre02 kernel: [<c017eac0>] sys_stat64+0x20/0x50 (20)
Oct 26 01:32:45 tigre02 kernel: [<c0291659>] copy_to_user+0x69/0x80 (24)
Oct 26 01:32:45 tigre02 kernel: [<c01339eb>]
sys_rt_sigprocmask+0x9b/0xf0 (28)
Oct 26 01:32:45 tigre02 kernel: [<c0105541>]
sysenter_past_esp+0x52/0x71 (48)
Oct 26 01:32:45 tigre02 kernel: preempt count: 00000002
Oct 26 01:32:45 tigre02 kernel: . 2-level deep critical section nesting:
Oct 26 01:32:45 tigre02 kernel: .. entry 1: smp_processor_id+0x5f/0xc0
[<c011f07f>] / (store_stackinfo+0x5d/0xb0 [<c0158fcd>])
Oct 26 01:32:46 tigre02 kernel: .. entry 2: print_traces+0x1d/0x60
[<c013fa7d>] / (dump_stack+0x23/0x30 [<c01064d3>])
Oct 26 01:32:46 tigre02 kernel:

Oct 26 01:32:46 tigre02 kernel: BUG: using smp_processor_id() in
preemptible [00000001] code: rc.sysinit/1628
Oct 26 01:32:46 tigre02 kernel: caller is store_stackinfo+0x5d/0xb0
Oct 26 01:32:46 tigre02 kernel: [<c011f0d7>] smp_processor_id+0xb7/0xc0
(12)
Oct 26 01:32:46 tigre02 kernel: [<c0158fcd>] store_stackinfo+0x5d/0xb0 (8)
Oct 26 01:32:46 tigre02 kernel: [<c0158fcd>] store_stackinfo+0x5d/0xb0 (24)
Oct 26 01:32:46 tigre02 kernel: [<c015ac1a>]
cache_free_debugcheck+0x1aa/0x390 (28)
Oct 26 01:32:46 tigre02 kernel: [<c0121d4c>] free_task+0x1c/0x40 (12)
Oct 26 01:32:46 tigre02 kernel: [<c015bd2e>] kfree+0x5e/0x120 (4)
Oct 26 01:32:46 tigre02 kernel: [<c0116454>] mcount+0x14/0x18 (8)
Oct 26 01:32:46 tigre02 kernel: [<c015bd41>] kfree+0x71/0x120 (28)
Oct 26 01:32:46 tigre02 kernel: [<c0121d4c>] free_task+0x1c/0x40 (12)
Oct 26 01:32:46 tigre02 kernel: [<c0121d4c>] free_task+0x1c/0x40 (28)
Oct 26 01:32:46 tigre02 kernel: [<c0126f9c>] release_task+0xec/0x1a0 (20)
Oct 26 01:32:46 tigre02 kernel: [<c0129617>]
wait_task_zombie+0x4b7/0x5d0 (40)
Oct 26 01:32:46 tigre02 kernel: [<c013e8cd>] __mcount+0x1d/0x30 (28)
Oct 26 01:32:46 tigre02 kernel: [<c0271ed8>] dummy_task_wait+0x8/0x10 (4)
Oct 26 01:32:46 tigre02 kernel: [<c0128ed1>] eligible_child+0x71/0xf0 (4)
Oct 26 01:32:46 tigre02 kernel: [<c0116454>] mcount+0x14/0x18 (8)
Oct 26 01:32:46 tigre02 kernel: [<c0271ed8>] dummy_task_wait+0x8/0x10 (20)
Oct 26 01:32:46 tigre02 kernel: [<c012a1ce>] do_wait+0x4ae/0x590 (24)
Oct 26 01:32:46 tigre02 kernel: [<c0291501>]
__copy_to_user_ll+0x11/0x80 (40)
Oct 26 01:32:46 tigre02 kernel: [<c011f1b0>]
default_wake_function+0x0/0x20 (28)
Oct 26 01:32:46 tigre02 kernel: [<c011f1b0>]
default_wake_function+0x0/0x20 (32)
Oct 26 01:32:46 tigre02 kernel: [<c012a3bc>] sys_waitpid+0x2c/0x30 (12)
Oct 26 01:32:46 tigre02 kernel: [<c0116454>] mcount+0x14/0x18 (8)
Oct 26 01:32:46 tigre02 kernel: [<c012a388>] sys_wait4+0x48/0x50 (20)
Oct 26 01:32:46 tigre02 kernel: [<c012a3bc>] sys_waitpid+0x2c/0x30 (28)
Oct 26 01:32:46 tigre02 kernel: [<c0105541>]
sysenter_past_esp+0x52/0x71 (24)
Oct 26 01:32:46 tigre02 kernel: preempt count: 00000002
Oct 26 01:32:46 tigre02 kernel: . 2-level deep critical section nesting:
Oct 26 01:32:47 tigre02 kernel: .. entry 1: smp_processor_id+0x5f/0xc0
[<c011f07f>] / (store_stackinfo+0x5d/0xb0 [<c0158fcd>])
Oct 26 01:32:47 tigre02 kernel: .. entry 2: print_traces+0x1d/0x60
[<c013fa7d>] / (dump_stack+0x23/0x30 [<c01064d3>])
Oct 26 01:32:47 tigre02 kernel:
The kernel is stable (X started).

Remi
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