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    SubjectBUG: scheduling while atomic: ..
    hi,
    found following bug in 2.6.31-rc8. CPU model is Intel(R) Atom(TM) CPU N270. This is produced at boot time. I havent had time to look into this yet but looks like an ACPI bug to me..

    <6>Checking 'hlt' instruction... OK.
    <6>ACPI: Core revision 20090521
    <3>BUG: scheduling while atomic: swapper/0/0x10000002
    <4>Modules linked in:
    <4>Pid: 0, comm: swapper Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c0129e92>] __schedule_bug+0x4d/0x52
    <4> [<c03a0354>] schedule+0x97/0xa6b
    <4> [<c01b8e4a>] ? __slab_free+0xd7/0x2ab
    <4> [<c01bf271>] ? put_object+0x3a/0x3d
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c02cb15d>] ? acpi_ps_pop_scope+0x79/0x84
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c012ba43>] __cond_resched+0x17/0x23
    <4> [<c03a0e2e>] _cond_resched+0x20/0x2b
    <4> [<c02ca71c>] acpi_ps_complete_op+0x214/0x223
    <4> [<c02c9a8d>] ? acpi_ps_get_next_simple_arg+0xe0/0xeb
    <4> [<c02cad98>] acpi_ps_parse_loop+0x66d/0x7bd
    <4> [<c02ca089>] acpi_ps_parse_aml+0xd4/0x324
    <4> [<c02c909a>] acpi_ns_one_complete_parse+0x10e/0x124
    <4> [<c02c90e9>] acpi_ns_parse_table+0x39/0x78
    <4> [<c02c5f57>] acpi_ns_load_table+0x63/0xe0
    <4> [<c02ccea6>] acpi_load_tables+0x6b/0x13e
    <4> [<c05606d1>] acpi_early_init+0x5d/0xeb
    <4> [<c054180c>] start_kernel+0x2ce/0x2dd
    <4> [<c0541091>] __init_begin+0x91/0x96
    <3>BUG: scheduling while atomic: swapper/0/0x10000002
    <4>Modules linked in:
    <4>Pid: 0, comm: swapper Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c0129e92>] __schedule_bug+0x4d/0x52
    <4> [<c03a0354>] schedule+0x97/0xa6b
    <4> [<c01b8e4a>] ? __slab_free+0xd7/0x2ab
    <4> [<c01bf271>] ? put_object+0x3a/0x3d
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c02cb15d>] ? acpi_ps_pop_scope+0x79/0x84
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c012ba43>] __cond_resched+0x17/0x23
    <4> [<c03a0e2e>] _cond_resched+0x20/0x2b
    <4> [<c02ca71c>] acpi_ps_complete_op+0x214/0x223
    <4> [<c02cad98>] acpi_ps_parse_loop+0x66d/0x7bd
    <4> [<c02ca089>] acpi_ps_parse_aml+0xd4/0x324
    <4> [<c02c909a>] acpi_ns_one_complete_parse+0x10e/0x124
    <4> [<c02c90e9>] acpi_ns_parse_table+0x39/0x78
    <4> [<c02c5f57>] acpi_ns_load_table+0x63/0xe0
    <4> [<c02ccea6>] acpi_load_tables+0x6b/0x13e
    <4> [<c05606d1>] acpi_early_init+0x5d/0xeb
    <4> [<c054180c>] start_kernel+0x2ce/0x2dd
    <4> [<c0541091>] __init_begin+0x91/0x96
    <3>BUG: scheduling while atomic: swapper/0/0x10000002
    <4>Modules linked in:
    <4>Pid: 0, comm: swapper Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c0129e92>] __schedule_bug+0x4d/0x52
    <4> [<c03a0354>] schedule+0x97/0xa6b
    <4> [<c01b8e4a>] ? __slab_free+0xd7/0x2ab
    <4> [<c01bf271>] ? put_object+0x3a/0x3d
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c02cb15d>] ? acpi_ps_pop_scope+0x79/0x84
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c012ba43>] __cond_resched+0x17/0x23
    <4> [<c03a0e2e>] _cond_resched+0x20/0x2b
    <4> [<c02ca71c>] acpi_ps_complete_op+0x214/0x223
    <4> [<c02cad98>] acpi_ps_parse_loop+0x66d/0x7bd
    <4> [<c02ca089>] acpi_ps_parse_aml+0xd4/0x324
    <4> [<c02c909a>] acpi_ns_one_complete_parse+0x10e/0x124
    <4> [<c02c90e9>] acpi_ns_parse_table+0x39/0x78
    <4> [<c02c5f57>] acpi_ns_load_table+0x63/0xe0
    <4> [<c02ccea6>] acpi_load_tables+0x6b/0x13e
    <4> [<c05606d1>] acpi_early_init+0x5d/0xeb
    <4> [<c054180c>] start_kernel+0x2ce/0x2dd
    <4> [<c0541091>] __init_begin+0x91/0x96
    <3>BUG: scheduling while atomic: swapper/0/0x10000002
    <4>Modules linked in:
    <4>Pid: 0, comm: swapper Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c0129e92>] __schedule_bug+0x4d/0x52
    <4> [<c03a0354>] schedule+0x97/0xa6b
    <4> [<c01b7e49>] ? init_object+0xe/0x67
    <4> [<c03a49d1>] ? sub_preempt_count+0x9/0x9f
    <4> [<c01ba21f>] ? kmem_cache_free+0x85/0xd5
    <4> [<c02abae5>] ? acpi_os_release_object+0xd/0x11
    <4> [<c02abae5>] ? acpi_os_release_object+0xd/0x11
    <4> [<c02abae5>] ? acpi_os_release_object+0xd/0x11
    <4> [<c02cb2c3>] ? acpi_ps_free_op+0x51/0x56
    <4> [<c02cafd0>] ? acpi_ps_delete_parse_tree+0x38/0x50
    <4> [<c012ba43>] __cond_resched+0x17/0x23
    <4> [<c03a0e2e>] _cond_resched+0x20/0x2b
    <4> [<c02ca71c>] acpi_ps_complete_op+0x214/0x223
    <4> [<c02b8ab9>] ? acpi_ds_load2_end_op+0x1b3/0x3f6
    <4> [<c02cad98>] acpi_ps_parse_loop+0x66d/0x7bd
    <4> [<c02ca089>] acpi_ps_parse_aml+0xd4/0x324
    <4> [<c02c909a>] acpi_ns_one_complete_parse+0x10e/0x124
    <4> [<c02c911b>] acpi_ns_parse_table+0x6b/0x78
    <4> [<c02c5f57>] acpi_ns_load_table+0x63/0xe0
    <4> [<c02ccea6>] acpi_load_tables+0x6b/0x13e
    <4> [<c05606d1>] acpi_early_init+0x5d/0xeb
    <4> [<c054180c>] start_kernel+0x2ce/0x2dd
    <4> [<c0541091>] __init_begin+0x91/0x96
    <3>BUG: scheduling while atomic: swapper/0/0x10000002
    <4>Modules linked in:
    <4>Pid: 0, comm: swapper Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c0129e92>] __schedule_bug+0x4d/0x52
    <4> [<c03a0354>] schedule+0x97/0xa6b
    <4> [<c01b8e4a>] ? __slab_free+0xd7/0x2ab
    <4> [<c01bf271>] ? put_object+0x3a/0x3d
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c02cb15d>] ? acpi_ps_pop_scope+0x79/0x84
    <4> [<c02ce4d8>] ? acpi_debug_print+0xa/0xc2
    <4> [<c012ba43>] __cond_resched+0x17/0x23
    <4> [<c03a0e2e>] _cond_resched+0x20/0x2b
    <4> [<c02ca71c>] acpi_ps_complete_op+0x214/0x223
    <4> [<c02cb21c>] ? acpi_ps_init_op+0x8/0x12
    <4> [<c02c9a8d>] ? acpi_ps_get_next_simple_arg+0xe0/0xeb
    <4> [<c02cad98>] acpi_ps_parse_loop+0x66d/0x7bd
    <4> [<c02ca089>] acpi_ps_parse_aml+0xd4/0x324
    <4> [<c02c909a>] acpi_ns_one_complete_parse+0x10e/0x124
    <4> [<c02c911b>] acpi_ns_parse_table+0x6b/0x78
    <4> [<c02c5f57>] acpi_ns_load_table+0x63/0xe0
    <4> [<c02ccea6>] acpi_load_tables+0x6b/0x13e
    <4> [<c05606d1>] acpi_early_init+0x5d/0xeb
    <4> [<c054180c>] start_kernel+0x2ce/0x2dd
    <4> [<c0541091>] __init_begin+0x91/0x96
    <3>BUG: scheduling while atomic: swapper/0/0x10000002
    <4>Modules linked in:
    <4>Pid: 0, comm: swapper Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c0129e92>] __schedule_bug+0x4d/0x52
    <4> [<c03a0354>] schedule+0x97/0xa6b
    <4> [<c01b7e49>] ? init_object+0xe/0x67
    <4> [<c03a49d1>] ? sub_preempt_count+0x9/0x9f
    <4> [<c01ba21f>] ? kmem_cache_free+0x85/0xd5
    <4> [<c02abae5>] ? acpi_os_release_object+0xd/0x11
    <4> [<c02abae5>] ? acpi_os_release_object+0xd/0x11
    <4> [<c02abae5>] ? acpi_os_release_object+0xd/0x11
    <4> [<c02cb2c3>] ? acpi_ps_free_op+0x51/0x56
    <4> [<c02cafd0>] ? acpi_ps_delete_parse_tree+0x38/0x50
    <4> [<c012ba43>] __cond_resched+0x17/0x23
    <4> [<c03a0e2e>] _cond_resched+0x20/0x2b
    <4> [<c02ca71c>] acpi_ps_complete_op+0x214/0x223
    <4> [<c02b8ab9>] ? acpi_ds_load2_end_op+0x1b3/0x3f6
    <4> [<c02cad98>] acpi_ps_parse_loop+0x66d/0x7bd
    <4> [<c02ca089>] acpi_ps_parse_aml+0xd4/0x324
    <4> [<c02c909a>] acpi_ns_one_complete_parse+0x10e/0x124
    <4> [<c02c911b>] acpi_ns_parse_table+0x6b/0x78
    <4> [<c02c5f57>] acpi_ns_load_table+0x63/0xe0
    <4> [<c02ccea6>] acpi_load_tables+0x6b/0x13e
    <4> [<c05606d1>] acpi_early_init+0x5d/0xeb
    <4> [<c054180c>] start_kernel+0x2ce/0x2dd
    <4> [<c0541091>] __init_begin+0x91/0x96
    <6>ftrace: converting mcount calls to 0f 1f 44 00 00
    <6>ftrace: allocating 14224 entries in 28 pages
    <6>..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
    <6>CPU0: Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping 02
    <6>Booting processor 1 APIC 0x1 ip 0x6000
    <6>Initializing CPU#1
    .....

    <3>BUG: using smp_processor_id() in preemptible [00000000] code: events/0/9
    <4>caller is vmstat_update+0x14/0x3e
    <4>Pid: 9, comm: events/0 Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c039ff98>] ? printk+0x14/0x1c
    <4> [<c0284e7a>] debug_smp_processor_id+0x9e/0xb4
    <4> [<c01a4749>] vmstat_update+0x14/0x3e
    <4> [<c0144a30>] worker_thread+0x15f/0x1e8
    <4> [<c01a4735>] ? vmstat_update+0x0/0x3e
    <4> [<c014809f>] ? autoremove_wake_function+0x0/0x38
    <4> [<c01448d1>] ? worker_thread+0x0/0x1e8
    <4> [<c0147d9e>] kthread+0x66/0x6b
    <4> [<c0147d38>] ? kthread+0x0/0x6b
    <4> [<c01035cf>] kernel_thread_helper+0x7/0x10
    <3>BUG: using smp_processor_id() in preemptible [00000000] code: events/0/9
    <4>caller is vmstat_update+0x2a/0x3e
    <4>Pid: 9, comm: events/0 Not tainted 2.6.31-git #3
    <4>Call Trace:
    <4> [<c039ff98>] ? printk+0x14/0x1c
    <4> [<c0284e7a>] debug_smp_processor_id+0x9e/0xb4
    <4> [<c01a475f>] vmstat_update+0x2a/0x3e
    <4> [<c0144a30>] worker_thread+0x15f/0x1e8
    <4> [<c01a4735>] ? vmstat_update+0x0/0x3e
    <4> [<c014809f>] ? autoremove_wake_function+0x0/0x38
    <4> [<c01448d1>] ? worker_thread+0x0/0x1e8
    <4> [<c0147d9e>] kthread+0x66/0x6b
    <4> [<c0147d38>] ? kthread+0x0/0x6b
    <4> [<c01035cf>] kernel_thread_helper+0x7/0x10

    kbpm


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