Re: [PATCH] kmemleak: Fix scheduling-while-atomic bug
From: Ming Lei
Date: Sat Aug 22 2009 - 22:50:41 EST
2009/7/8 Catalin Marinas <catalin.marinas@xxxxxxx>:
> Hi Ingo,
>
> On Wed, 2009-07-01 at 11:30 +0200, Ingo Molnar wrote:
>> * Catalin Marinas <catalin.marinas@xxxxxxx> wrote:
>>
>> > > The minimal fix below removes scan_yield() and adds a
>> > > cond_resched() to the outmost (safe) place of the scanning
>> > > thread. This solves the regression.
>> >
>> > With CONFIG_PREEMPT disabled it won't reschedule during the bss
>> > scanning but I don't see this as a real issue (task stacks
>> > scanning probably takes longer anyway).
>>
>> Yeah. I suspect one more cond_resched() could be added - i just
>> didnt see an obvious place for it, given that scan_block() is being
>> called with asymetric held-locks contexts.
>
> I tried with a few cond_resched() calls in the kmemleak_scan() function
> but it looks like a significant (well, 1-2 seconds, depending on the
> hardware) amount of time is spent in scanning the data and bss sections.
> The patch below makes the system with !PREEMPT more responsive during
> the scanning episodes.
>
> Are you ok with this approach? Thanks.
>
>
> kmemleak: Add more cond_resched() calls in the scanning thread
>
> From: Catalin Marinas <catalin.marinas@xxxxxxx>
>
> Following recent fix to no longer reschedule in the scan_block()
> function, the system may become unresponsive with !PREEMPT. This patch
> re-adds the cond_resched() call to scan_block() but conditioned by the
> allow_resched parameter.
>
> Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxx>
> ---
> mm/kmemleak.c | 19 +++++++++++--------
> 1 files changed, 11 insertions(+), 8 deletions(-)
>
> diff --git a/mm/kmemleak.c b/mm/kmemleak.c
> index 6006553..93f1481 100644
> --- a/mm/kmemleak.c
> +++ b/mm/kmemleak.c
> @@ -807,7 +807,7 @@ static int scan_should_stop(void)
> * found to the gray list.
> */
> static void scan_block(void *_start, void *_end,
> - struct kmemleak_object *scanned)
> + struct kmemleak_object *scanned, int allow_resched)
> {
> unsigned long *ptr;
> unsigned long *start = PTR_ALIGN(_start, BYTES_PER_POINTER);
> @@ -818,6 +818,8 @@ static void scan_block(void *_start, void *_end,
> unsigned long pointer = *ptr;
> struct kmemleak_object *object;
>
> + if (allow_resched)
> + cond_resched();
> if (scan_should_stop())
> break;
>
> @@ -881,12 +883,12 @@ static void scan_object(struct kmemleak_object *object)
> goto out;
> if (hlist_empty(&object->area_list))
> scan_block((void *)object->pointer,
> - (void *)(object->pointer + object->size), object);
> + (void *)(object->pointer + object->size), object, 0);
> else
> hlist_for_each_entry(area, elem, &object->area_list, node)
> scan_block((void *)(object->pointer + area->offset),
> (void *)(object->pointer + area->offset
> - + area->length), object);
> + + area->length), object, 0);
> out:
> spin_unlock_irqrestore(&object->lock, flags);
> }
> @@ -931,14 +933,14 @@ static void kmemleak_scan(void)
> rcu_read_unlock();
>
> /* data/bss scanning */
> - scan_block(_sdata, _edata, NULL);
> - scan_block(__bss_start, __bss_stop, NULL);
> + scan_block(_sdata, _edata, NULL, 1);
> + scan_block(__bss_start, __bss_stop, NULL, 1);
>
> #ifdef CONFIG_SMP
> /* per-cpu sections scanning */
> for_each_possible_cpu(i)
> scan_block(__per_cpu_start + per_cpu_offset(i),
> - __per_cpu_end + per_cpu_offset(i), NULL);
> + __per_cpu_end + per_cpu_offset(i), NULL, 1);
> #endif
>
> /*
> @@ -960,7 +962,7 @@ static void kmemleak_scan(void)
> /* only scan if page is in use */
> if (page_count(page) == 0)
> continue;
> - scan_block(page, page + 1, NULL);
> + scan_block(page, page + 1, NULL, 1);
> }
> }
>
> @@ -972,7 +974,8 @@ static void kmemleak_scan(void)
> read_lock(&tasklist_lock);
> for_each_process(task)
> scan_block(task_stack_page(task),
> - task_stack_page(task) + THREAD_SIZE, NULL);
> + task_stack_page(task) + THREAD_SIZE,
> + NULL, 0);
> read_unlock(&tasklist_lock);
> }
>
This still exits in 2.6.31-rc7 if kmemcheck is enabled, and isn't the patch
merged into mainline?
Thanks.
[ 0.006569] ACPI: Core revision 20090521
[ 0.011476] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.011558] no locks held by swapper/0.
[ 0.011561] Modules linked in:
[ 0.011566] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.011569] Call Trace:
[ 0.011577] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.011584] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.011590] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.011596] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.011600] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.011604] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.011609] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.011614] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.011620] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.011625] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.011630] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.011635] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.011640] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.011645] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.011650] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.011656] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.011661] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.011666] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.011670] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.011675] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.012058] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.012135] no locks held by swapper/0.
[ 0.012138] Modules linked in:
[ 0.012141] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.012144] Call Trace:
[ 0.012148] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.012153] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.012157] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.012162] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.012166] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.012170] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.012175] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.012180] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.012184] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.012189] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.012194] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.012199] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.012204] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.012209] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.012213] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.012217] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.012222] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.012226] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.012231] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.012235] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.021056] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.021134] no locks held by swapper/0.
[ 0.021136] Modules linked in:
[ 0.021140] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.021143] Call Trace:
[ 0.021147] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.021152] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.021156] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.021161] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.021167] [<ffffffff811bbd5f>] ? acpi_os_release_object+0xe/0x12
[ 0.021172] [<ffffffff811db561>] ? acpi_ps_free_op+0x27/0x29
[ 0.021177] [<ffffffff811db28b>] ? acpi_ps_delete_parse_tree+0x43/0x60
[ 0.021181] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.021186] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.021190] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.021195] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.021200] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.021205] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.021210] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.021215] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.021219] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.021223] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.021228] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.021232] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.021236] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.021241] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.030047] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.030127] no locks held by swapper/0.
[ 0.030129] Modules linked in:
[ 0.030133] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.030135] Call Trace:
[ 0.030140] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.030145] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.030149] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.030153] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.030158] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.030162] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.030167] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.030171] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.030176] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.030181] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.030186] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.030190] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.030196] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.030200] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.030204] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.030209] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.030213] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.030217] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.030222] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.030226] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.039062] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.039141] no locks held by swapper/0.
[ 0.039143] Modules linked in:
[ 0.039147] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.039150] Call Trace:
[ 0.039154] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.039159] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.039164] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.039168] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.039172] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.039177] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.039181] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.039186] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.039190] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.039195] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.039200] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.039205] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.039210] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.039215] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.039219] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.039223] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.039228] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.039232] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.039236] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.039241] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.048030] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.048108] no locks held by swapper/0.
[ 0.048111] Modules linked in:
[ 0.048115] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.048117] Call Trace:
[ 0.048122] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.048126] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.048131] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.048135] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.048140] [<ffffffff811bbd5f>] ? acpi_os_release_object+0xe/0x12
[ 0.048145] [<ffffffff811db561>] ? acpi_ps_free_op+0x27/0x29
[ 0.048150] [<ffffffff811db28b>] ? acpi_ps_delete_parse_tree+0x43/0x60
[ 0.048154] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.048158] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.048163] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.048168] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.048173] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.048178] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.048183] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.048187] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.048192] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.048196] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.048200] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.048205] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.048209] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.048214] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.057134] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.057213] no locks held by swapper/0.
[ 0.057215] Modules linked in:
[ 0.057219] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.057221] Call Trace:
[ 0.057226] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.057231] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.057235] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.057239] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.057244] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.057248] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.057253] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.057257] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.057262] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.057267] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.057272] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.057277] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.057282] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.057286] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.057290] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.057295] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.057299] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.057304] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.057308] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.057313] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.066077] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.066156] no locks held by swapper/0.
[ 0.066158] Modules linked in:
[ 0.066162] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.066165] Call Trace:
[ 0.066169] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.066174] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.066179] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.066183] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.066188] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.066192] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.066197] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.066201] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.066206] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.066211] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.066216] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.066221] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.066226] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.066230] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.066235] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.066239] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.066243] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.066248] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.066252] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.066257] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.075010] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.075088] no locks held by swapper/0.
[ 0.075090] Modules linked in:
[ 0.075094] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.075097] Call Trace:
[ 0.075101] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.075106] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.075111] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.075115] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.075120] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.075124] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.075129] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.075133] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.075138] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.075143] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.075148] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.075152] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.075158] [<ffffffff811d91bd>] acpi_ns_parse_table+0x21/0x3c
[ 0.075162] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.075166] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.075171] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.075175] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.075180] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.075184] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.075189] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.084057] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.084136] no locks held by swapper/0.
[ 0.084139] Modules linked in:
[ 0.084143] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.084145] Call Trace:
[ 0.084150] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.084155] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.084159] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.084163] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.084169] [<ffffffff811bbd5f>] ? acpi_os_release_object+0xe/0x12
[ 0.084173] [<ffffffff811db561>] ? acpi_ps_free_op+0x27/0x29
[ 0.084178] [<ffffffff811db28b>] ? acpi_ps_delete_parse_tree+0x43/0x60
[ 0.084183] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.084187] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.084191] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.084196] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.084201] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.084206] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.084211] [<ffffffff811d91d1>] acpi_ns_parse_table+0x35/0x3c
[ 0.084216] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.084220] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.084225] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.084229] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.084233] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.084238] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.084242] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.093045] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.093126] no locks held by swapper/0.
[ 0.093128] Modules linked in:
[ 0.093132] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.093134] Call Trace:
[ 0.093139] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.093143] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.093148] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.093152] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.093157] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.093161] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.093166] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.093170] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.093175] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.093180] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.093185] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.093190] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.093195] [<ffffffff811d91d1>] acpi_ns_parse_table+0x35/0x3c
[ 0.093199] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.093203] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.093208] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.093212] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.093217] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.093221] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.093226] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.102024] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.102104] no locks held by swapper/0.
[ 0.102106] Modules linked in:
[ 0.102110] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.102112] Call Trace:
[ 0.102117] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.102122] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.102126] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.102130] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.102136] [<ffffffff811bbd5f>] ? acpi_os_release_object+0xe/0x12
[ 0.102141] [<ffffffff811db561>] ? acpi_ps_free_op+0x27/0x29
[ 0.102145] [<ffffffff811db28b>] ? acpi_ps_delete_parse_tree+0x43/0x60
[ 0.102150] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.102154] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.102159] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.102164] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.102169] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.102173] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.102179] [<ffffffff811d91d1>] acpi_ns_parse_table+0x35/0x3c
[ 0.102183] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.102187] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.102192] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.102196] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.102201] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.102205] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.102210] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.111000] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.111078] no locks held by swapper/0.
[ 0.111081] Modules linked in:
[ 0.111085] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.111087] Call Trace:
[ 0.111092] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.111097] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.111101] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.111105] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.111111] [<ffffffff811bbd5f>] ? acpi_os_release_object+0xe/0x12
[ 0.111116] [<ffffffff811db561>] ? acpi_ps_free_op+0x27/0x29
[ 0.111120] [<ffffffff811db28b>] ? acpi_ps_delete_parse_tree+0x43/0x60
[ 0.111125] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.111129] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.111134] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.111139] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.111144] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.111149] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.111154] [<ffffffff811d91d1>] acpi_ns_parse_table+0x35/0x3c
[ 0.111158] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.111163] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.111167] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.111172] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.111176] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.111181] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.111185] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.120108] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.120186] no locks held by swapper/0.
[ 0.120189] Modules linked in:
[ 0.120193] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.120195] Call Trace:
[ 0.120200] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.120205] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.120209] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.120213] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.120219] [<ffffffff811bbd5f>] ? acpi_os_release_object+0xe/0x12
[ 0.120223] [<ffffffff811db561>] ? acpi_ps_free_op+0x27/0x29
[ 0.120228] [<ffffffff811db28b>] ? acpi_ps_delete_parse_tree+0x43/0x60
[ 0.120232] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.120237] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.120241] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.120246] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.120251] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.120256] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.120261] [<ffffffff811d91d1>] acpi_ns_parse_table+0x35/0x3c
[ 0.120266] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.120270] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.120275] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.120279] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.120283] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.120288] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.120293] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
[ 0.129041] BUG: scheduling while atomic: swapper/0/0x10000002
[ 0.129120] no locks held by swapper/0.
[ 0.129122] Modules linked in:
[ 0.129126] Pid: 0, comm: swapper Not tainted 2.6.31-rc7 #141
[ 0.129129] Call Trace:
[ 0.129133] [<ffffffff81070bb7>] ? __debug_show_held_locks+0x22/0x24
[ 0.129138] [<ffffffff8103d4ba>] __schedule_bug+0x77/0x7c
[ 0.129143] [<ffffffff812da32f>] schedule+0xd6/0xa3f
[ 0.129147] [<ffffffff810e4b9b>] ? kmem_cache_free+0xe2/0x158
[ 0.129152] [<ffffffff810717e2>] ? trace_hardirqs_on_caller+0x12d/0x158
[ 0.129156] [<ffffffff8107181a>] ? trace_hardirqs_on+0xd/0xf
[ 0.129161] [<ffffffff8103e3f0>] __cond_resched+0x29/0x47
[ 0.129165] [<ffffffff812dae24>] _cond_resched+0x29/0x34
[ 0.129170] [<ffffffff811da90a>] acpi_ps_complete_op+0x246/0x25c
[ 0.129175] [<ffffffff811db024>] acpi_ps_parse_loop+0x704/0x860
[ 0.129180] [<ffffffff811da200>] acpi_ps_parse_aml+0x9f/0x2de
[ 0.129185] [<ffffffff811d9181>] acpi_ns_one_complete_parse+0x101/0x11c
[ 0.129190] [<ffffffff811d91d1>] acpi_ns_parse_table+0x35/0x3c
[ 0.129195] [<ffffffff811d67e3>] acpi_ns_load_table+0x4f/0x94
[ 0.129199] [<ffffffff811dd14a>] acpi_load_tables+0x72/0x133
[ 0.129203] [<ffffffff8153c592>] acpi_early_init+0x60/0xf5
[ 0.129208] [<ffffffff81519cb0>] start_kernel+0x38b/0x3a0
[ 0.129212] [<ffffffff81519140>] ? early_idt_handler+0x0/0x71
[ 0.129217] [<ffffffff815192a3>] x86_64_start_reservations+0xaa/0xae
[ 0.129221] [<ffffffff8151939e>] x86_64_start_kernel+0xf7/0x106
--
Lei Ming
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