* sched: circular dependency between sched_domains_mutex and oom_notify_list
@ 2013-02-17 5:42 Sasha Levin
2013-02-18 8:26 ` Ingo Molnar
2013-02-19 4:48 ` Michael Wang
0 siblings, 2 replies; 5+ messages in thread
From: Sasha Levin @ 2013-02-17 5:42 UTC (permalink / raw)
To: Ingo Molnar, Thomas Gleixner, Peter Zijlstra
Cc: Paul E. McKenney, Dave Jones, linux-kernel@vger.kernel.org
Hi all,
I was fuzzing with trinity inside a KVM tools guest, with today's -next kernel
when I've hit the following spew.
I suspect it's the result of adding the new rcu_oom_notify, but that happened
about half a year ago so I'm not sure why this showed up only now.
[ 1039.634183] ======================================================
[ 1039.635717] [ INFO: possible circular locking dependency detected ]
[ 1039.637255] 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286 Tainted: G W
[ 1039.639104] -------------------------------------------------------
[ 1039.640579] init/1 is trying to acquire lock:
[ 1039.641224] ((oom_notify_list).rwsem){.+.+..}, at: [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
[ 1039.641224]
[ 1039.641224] but task is already holding lock:
[ 1039.641224] (sched_domains_mutex){+.+.+.}, at: [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
[ 1039.641224]
[ 1039.641224] which lock already depends on the new lock.
[ 1039.641224]
[ 1039.641224]
[ 1039.641224] the existing dependency chain (in reverse order) is:
[ 1039.641224]
-> #2 (sched_domains_mutex){+.+.+.}:
[ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
[ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
[ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
[ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
[ 1039.641224] [<ffffffff83d8a19a>] __mutex_lock_common+0x5a/0x560
[ 1039.641224] [<ffffffff83d8a7cf>] mutex_lock_nested+0x3f/0x50
[ 1039.641224] [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
[ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
[ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
[ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
[ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
[ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
[ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
[ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
[ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
[ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
[ 1039.641224]
-> #1 (cpu_hotplug.lock){+.+.+.}:
[ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
[ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
[ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
[ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
[ 1039.641224] [<ffffffff83d8a19a>] __mutex_lock_common+0x5a/0x560
[ 1039.641224] [<ffffffff83d8a7cf>] mutex_lock_nested+0x3f/0x50
[ 1039.641224] [<ffffffff8110de77>] get_online_cpus+0x37/0x50
[ 1039.641224] [<ffffffff811d01b4>] rcu_oom_notify+0x94/0x150
[ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
[ 1039.641224] [<ffffffff81141ca8>] __blocking_notifier_call_chain+0x98/0xc0
[ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
[ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
[ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
[ 1039.641224] [<ffffffff8125d6ac>] alloc_pages_vma+0xfc/0x150
[ 1039.641224] [<ffffffff812509f0>] read_swap_cache_async+0x90/0x220
[ 1039.641224] [<ffffffff81250c1e>] swapin_readahead+0x9e/0xf0
[ 1039.641224] [<ffffffff8123af57>] do_swap_page.isra.41+0x107/0x5a0
[ 1039.641224] [<ffffffff8123d056>] handle_pte_fault+0x126/0x200
[ 1039.641224] [<ffffffff8123e4a7>] handle_mm_fault+0x397/0x3e0
[ 1039.641224] [<ffffffff8123e9d8>] __get_user_pages+0x418/0x5f0
[ 1039.641224] [<ffffffff81240563>] __mlock_vma_pages_range+0xb3/0xc0
[ 1039.641224] [<ffffffff81240a74>] __mm_populate+0xf4/0x170
[ 1039.641224] [<ffffffff81240e10>] sys_mlockall+0x160/0x1a0
[ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
[ 1039.641224]
-> #0 ((oom_notify_list).rwsem){.+.+..}:
[ 1039.641224] [<ffffffff8117fb55>] check_prev_add+0x115/0x640
[ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
[ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
[ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
[ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
[ 1039.641224] [<ffffffff83d8adb7>] down_read+0x47/0x8e
[ 1039.641224] [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
[ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
[ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
[ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
[ 1039.641224] [<ffffffff8126629a>] allocate_slab+0x13a/0x1f0
[ 1039.641224] [<ffffffff8126637b>] new_slab+0x2b/0x1b0
[ 1039.641224] [<ffffffff83d030e1>] __slab_alloc.isra.34+0x1c5/0x31f
[ 1039.641224] [<ffffffff81268e14>] kmem_cache_alloc_node_trace+0x114/0x390
[ 1039.641224] [<ffffffff8114b567>] __sdt_alloc+0x137/0x1f0
[ 1039.641224] [<ffffffff81151d2c>] build_sched_domains+0x2c/0x4e0
[ 1039.641224] [<ffffffff81152603>] partition_sched_domains+0x353/0x3f0
[ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
[ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
[ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
[ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
[ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
[ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
[ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
[ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
[ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
[ 1039.641224]
[ 1039.641224] other info that might help us debug this:
[ 1039.641224]
[ 1039.641224] Chain exists of:
(oom_notify_list).rwsem --> cpu_hotplug.lock --> sched_domains_mutex
[ 1039.641224] Possible unsafe locking scenario:
[ 1039.641224]
[ 1039.641224] CPU0 CPU1
[ 1039.641224] ---- ----
[ 1039.641224] lock(sched_domains_mutex);
[ 1039.641224] lock(cpu_hotplug.lock);
[ 1039.641224] lock(sched_domains_mutex);
[ 1039.641224] lock((oom_notify_list).rwsem);
[ 1039.641224]
[ 1039.641224] *** DEADLOCK ***
[ 1039.641224]
[ 1039.641224] 4 locks held by init/1:
[ 1039.641224] #0: (reboot_mutex){+.+.+.}, at: [<ffffffff81128a2e>] sys_reboot+0xde/0x2b0
[ 1039.641224] #1: (cpu_add_remove_lock){+.+.+.}, at: [<ffffffff8110dea2>] cpu_maps_update_begin+0x12/0x20
[ 1039.641224] #2: (cpu_hotplug.lock){+.+.+.}, at: [<ffffffff8110dd87>] cpu_hotplug_begin+0x27/0x60
[ 1039.641224] #3: (sched_domains_mutex){+.+.+.}, at: [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
[ 1039.641224]
[ 1039.641224] stack backtrace:
[ 1039.641224] Pid: 1, comm: init Tainted: G W 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286
[ 1039.641224] Call Trace:
[ 1039.641224] [<ffffffff83cff50f>] print_circular_bug+0xd3/0xe4
[ 1039.641224] [<ffffffff8117fb55>] check_prev_add+0x115/0x640
[ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
[ 1039.641224] [<ffffffff81074ef5>] ? sched_clock+0x15/0x20
[ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
[ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
[ 1039.641224] [<ffffffff81074ef5>] ? sched_clock+0x15/0x20
[ 1039.641224] [<ffffffff810a1258>] ? kvm_clock_read+0x38/0x70
[ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
[ 1039.641224] [<ffffffff81141c8f>] ? __blocking_notifier_call_chain+0x7f/0xc0
[ 1039.641224] [<ffffffff83d8adb7>] down_read+0x47/0x8e
[ 1039.641224] [<ffffffff81141c8f>] ? __blocking_notifier_call_chain+0x7f/0xc0
[ 1039.641224] [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
[ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
[ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
[ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
[ 1039.641224] [<ffffffff8126629a>] allocate_slab+0x13a/0x1f0
[ 1039.641224] [<ffffffff8126637b>] new_slab+0x2b/0x1b0
[ 1039.641224] [<ffffffff83d030e1>] __slab_alloc.isra.34+0x1c5/0x31f
[ 1039.641224] [<ffffffff81182492>] ? __lock_is_held+0x52/0x80
[ 1039.641224] [<ffffffff8114b567>] ? __sdt_alloc+0x137/0x1f0
[ 1039.641224] [<ffffffff81268e14>] kmem_cache_alloc_node_trace+0x114/0x390
[ 1039.641224] [<ffffffff8123349b>] ? pcpu_alloc+0x32b/0x3e0
[ 1039.641224] [<ffffffff8114b52b>] ? __sdt_alloc+0xfb/0x1f0
[ 1039.641224] [<ffffffff8114b567>] ? __sdt_alloc+0x137/0x1f0
[ 1039.641224] [<ffffffff8114b567>] __sdt_alloc+0x137/0x1f0
[ 1039.641224] [<ffffffff811524d0>] ? partition_sched_domains+0x220/0x3f0
[ 1039.641224] [<ffffffff81151d2c>] build_sched_domains+0x2c/0x4e0
[ 1039.641224] [<ffffffff81152603>] partition_sched_domains+0x353/0x3f0
[ 1039.641224] [<ffffffff81152397>] ? partition_sched_domains+0xe7/0x3f0
[ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
[ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
[ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
[ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
[ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
[ 1039.641224] [<ffffffff83cfd6b8>] ? printk+0x5c/0x5e
[ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
[ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
[ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
[ 1039.641224] [<ffffffff811d5dc4>] ? rcu_eqs_exit_common+0x64/0x340
[ 1039.641224] [<ffffffff811d7146>] ? rcu_eqs_enter_common+0x306/0x3a0
[ 1039.641224] [<ffffffff8120cac5>] ? user_exit+0xa5/0xd0
[ 1039.641224] [<ffffffff811813e8>] ? trace_hardirqs_on_caller+0x128/0x160
[ 1039.641224] [<ffffffff8118142d>] ? trace_hardirqs_on+0xd/0x10
[ 1039.641224] [<ffffffff8107ad34>] ? syscall_trace_enter+0x24/0x2e0
[ 1039.641224] [<ffffffff811813e8>] ? trace_hardirqs_on_caller+0x128/0x160
[ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
Thanks,
Sasha
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: sched: circular dependency between sched_domains_mutex and oom_notify_list
2013-02-17 5:42 sched: circular dependency between sched_domains_mutex and oom_notify_list Sasha Levin
@ 2013-02-18 8:26 ` Ingo Molnar
2013-02-19 0:32 ` Sasha Levin
2013-02-19 4:48 ` Michael Wang
1 sibling, 1 reply; 5+ messages in thread
From: Ingo Molnar @ 2013-02-18 8:26 UTC (permalink / raw)
To: Sasha Levin
Cc: Ingo Molnar, Thomas Gleixner, Peter Zijlstra, Paul E. McKenney,
Dave Jones, linux-kernel@vger.kernel.org
* Sasha Levin <sasha.levin@oracle.com> wrote:
> I suspect it's the result of adding the new rcu_oom_notify, but that happened
> about half a year ago so I'm not sure why this showed up only now.
>
> [ 1039.634183] ======================================================
> [ 1039.635717] [ INFO: possible circular locking dependency detected ]
> [ 1039.637255] 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286 Tainted: G W
> [ 1039.639104] -------------------------------------------------------
> [ 1039.640579] init/1 is trying to acquire lock:
> [ 1039.641224] ((oom_notify_list).rwsem){.+.+..}, at: [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
We changed (optimized) rwsems via:
3a15e0e0cdda rwsem: Implement writer lock-stealing for better scalability
so maybe it can hit different codepaths and races now?
Thanks,
Ingo
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: sched: circular dependency between sched_domains_mutex and oom_notify_list
2013-02-18 8:26 ` Ingo Molnar
@ 2013-02-19 0:32 ` Sasha Levin
0 siblings, 0 replies; 5+ messages in thread
From: Sasha Levin @ 2013-02-19 0:32 UTC (permalink / raw)
To: Ingo Molnar
Cc: Ingo Molnar, Thomas Gleixner, Peter Zijlstra, Paul E. McKenney,
Dave Jones, linux-kernel@vger.kernel.org
On 02/18/2013 03:26 AM, Ingo Molnar wrote:
>
> * Sasha Levin <sasha.levin@oracle.com> wrote:
>
>> I suspect it's the result of adding the new rcu_oom_notify, but that happened
>> about half a year ago so I'm not sure why this showed up only now.
>>
>> [ 1039.634183] ======================================================
>> [ 1039.635717] [ INFO: possible circular locking dependency detected ]
>> [ 1039.637255] 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286 Tainted: G W
>> [ 1039.639104] -------------------------------------------------------
>> [ 1039.640579] init/1 is trying to acquire lock:
>> [ 1039.641224] ((oom_notify_list).rwsem){.+.+..}, at: [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
>
> We changed (optimized) rwsems via:
>
> 3a15e0e0cdda rwsem: Implement writer lock-stealing for better scalability
>
> so maybe it can hit different codepaths and races now?
I don't think that that patch would modify codepaths - it might just cause some
race conditions more probable.
I'm still thinking that the issue is the new rcu oom thingie and since this
codepath is very unlikely (running out of memory while sched_domains_mutex is
held - which is very rare) it's the culprit.
Thanks,
Sasha
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: sched: circular dependency between sched_domains_mutex and oom_notify_list
2013-02-17 5:42 sched: circular dependency between sched_domains_mutex and oom_notify_list Sasha Levin
2013-02-18 8:26 ` Ingo Molnar
@ 2013-02-19 4:48 ` Michael Wang
2013-02-19 8:58 ` Michael Wang
1 sibling, 1 reply; 5+ messages in thread
From: Michael Wang @ 2013-02-19 4:48 UTC (permalink / raw)
To: Sasha Levin
Cc: Ingo Molnar, Thomas Gleixner, Peter Zijlstra, Paul E. McKenney,
Dave Jones, linux-kernel@vger.kernel.org
On 02/17/2013 01:42 PM, Sasha Levin wrote:
> Hi all,
>
> I was fuzzing with trinity inside a KVM tools guest, with today's -next kernel
> when I've hit the following spew.
>
> I suspect it's the result of adding the new rcu_oom_notify, but that happened
> about half a year ago so I'm not sure why this showed up only now.
Hi, Sasha
This is a rarely one, isn't it? require 2 conditions:
1. system is oom.
2. rebooting.
The possible dead lock related to oom_notify_list I suppose is:
CONTEXT A CONTEXT B
1 oom reboot
2 LOCK oom_notify_list cpu_down()
3 rcu_oom_notify() LOCK cpu_hotplug.lock
4 get_online_cpus() partition_sched_domains()
5 LOCK cpu_hotplug.lock __sdt_alloc()
6 oom
7 LOCK oom_notify_list
DEAD LOCK
So rcu_oom_notify() trying to lock cpu_hotplug.lock with oom_notify_list
locked, and __sdt_alloc() trying to lock oom_notify_list with
cpu_hotplug.lock locked, a circular locking case.
But I'm not sure why the log show the "sched_domains_mutex" as a target,
so is your system really dead lock or it's just a fake report?
Regards,
Michael Wang
>
> [ 1039.634183] ======================================================
> [ 1039.635717] [ INFO: possible circular locking dependency detected ]
> [ 1039.637255] 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286 Tainted: G W
> [ 1039.639104] -------------------------------------------------------
> [ 1039.640579] init/1 is trying to acquire lock:
> [ 1039.641224] ((oom_notify_list).rwsem){.+.+..}, at: [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
> [ 1039.641224]
> [ 1039.641224] but task is already holding lock:
> [ 1039.641224] (sched_domains_mutex){+.+.+.}, at: [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
> [ 1039.641224]
> [ 1039.641224] which lock already depends on the new lock.
> [ 1039.641224]
> [ 1039.641224]
> [ 1039.641224] the existing dependency chain (in reverse order) is:
> [ 1039.641224]
> -> #2 (sched_domains_mutex){+.+.+.}:
> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
> [ 1039.641224] [<ffffffff83d8a19a>] __mutex_lock_common+0x5a/0x560
> [ 1039.641224] [<ffffffff83d8a7cf>] mutex_lock_nested+0x3f/0x50
> [ 1039.641224] [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
> [ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
> [ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
> [ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
> [ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
> [ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
> [ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
> [ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
> [ 1039.641224]
> -> #1 (cpu_hotplug.lock){+.+.+.}:
> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
> [ 1039.641224] [<ffffffff83d8a19a>] __mutex_lock_common+0x5a/0x560
> [ 1039.641224] [<ffffffff83d8a7cf>] mutex_lock_nested+0x3f/0x50
> [ 1039.641224] [<ffffffff8110de77>] get_online_cpus+0x37/0x50
> [ 1039.641224] [<ffffffff811d01b4>] rcu_oom_notify+0x94/0x150
> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
> [ 1039.641224] [<ffffffff81141ca8>] __blocking_notifier_call_chain+0x98/0xc0
> [ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
> [ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
> [ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
> [ 1039.641224] [<ffffffff8125d6ac>] alloc_pages_vma+0xfc/0x150
> [ 1039.641224] [<ffffffff812509f0>] read_swap_cache_async+0x90/0x220
> [ 1039.641224] [<ffffffff81250c1e>] swapin_readahead+0x9e/0xf0
> [ 1039.641224] [<ffffffff8123af57>] do_swap_page.isra.41+0x107/0x5a0
> [ 1039.641224] [<ffffffff8123d056>] handle_pte_fault+0x126/0x200
> [ 1039.641224] [<ffffffff8123e4a7>] handle_mm_fault+0x397/0x3e0
> [ 1039.641224] [<ffffffff8123e9d8>] __get_user_pages+0x418/0x5f0
> [ 1039.641224] [<ffffffff81240563>] __mlock_vma_pages_range+0xb3/0xc0
> [ 1039.641224] [<ffffffff81240a74>] __mm_populate+0xf4/0x170
> [ 1039.641224] [<ffffffff81240e10>] sys_mlockall+0x160/0x1a0
> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
> [ 1039.641224]
> -> #0 ((oom_notify_list).rwsem){.+.+..}:
> [ 1039.641224] [<ffffffff8117fb55>] check_prev_add+0x115/0x640
> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
> [ 1039.641224] [<ffffffff83d8adb7>] down_read+0x47/0x8e
> [ 1039.641224] [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
> [ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
> [ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
> [ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
> [ 1039.641224] [<ffffffff8126629a>] allocate_slab+0x13a/0x1f0
> [ 1039.641224] [<ffffffff8126637b>] new_slab+0x2b/0x1b0
> [ 1039.641224] [<ffffffff83d030e1>] __slab_alloc.isra.34+0x1c5/0x31f
> [ 1039.641224] [<ffffffff81268e14>] kmem_cache_alloc_node_trace+0x114/0x390
> [ 1039.641224] [<ffffffff8114b567>] __sdt_alloc+0x137/0x1f0
> [ 1039.641224] [<ffffffff81151d2c>] build_sched_domains+0x2c/0x4e0
> [ 1039.641224] [<ffffffff81152603>] partition_sched_domains+0x353/0x3f0
> [ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
> [ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
> [ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
> [ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
> [ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
> [ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
> [ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
> [ 1039.641224]
> [ 1039.641224] other info that might help us debug this:
> [ 1039.641224]
> [ 1039.641224] Chain exists of:
> (oom_notify_list).rwsem --> cpu_hotplug.lock --> sched_domains_mutex
>
> [ 1039.641224] Possible unsafe locking scenario:
> [ 1039.641224]
> [ 1039.641224] CPU0 CPU1
> [ 1039.641224] ---- ----
> [ 1039.641224] lock(sched_domains_mutex);
> [ 1039.641224] lock(cpu_hotplug.lock);
> [ 1039.641224] lock(sched_domains_mutex);
> [ 1039.641224] lock((oom_notify_list).rwsem);
> [ 1039.641224]
> [ 1039.641224] *** DEADLOCK ***
> [ 1039.641224]
> [ 1039.641224] 4 locks held by init/1:
> [ 1039.641224] #0: (reboot_mutex){+.+.+.}, at: [<ffffffff81128a2e>] sys_reboot+0xde/0x2b0
> [ 1039.641224] #1: (cpu_add_remove_lock){+.+.+.}, at: [<ffffffff8110dea2>] cpu_maps_update_begin+0x12/0x20
> [ 1039.641224] #2: (cpu_hotplug.lock){+.+.+.}, at: [<ffffffff8110dd87>] cpu_hotplug_begin+0x27/0x60
> [ 1039.641224] #3: (sched_domains_mutex){+.+.+.}, at: [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
> [ 1039.641224]
> [ 1039.641224] stack backtrace:
> [ 1039.641224] Pid: 1, comm: init Tainted: G W 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286
> [ 1039.641224] Call Trace:
> [ 1039.641224] [<ffffffff83cff50f>] print_circular_bug+0xd3/0xe4
> [ 1039.641224] [<ffffffff8117fb55>] check_prev_add+0x115/0x640
> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
> [ 1039.641224] [<ffffffff81074ef5>] ? sched_clock+0x15/0x20
> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
> [ 1039.641224] [<ffffffff81074ef5>] ? sched_clock+0x15/0x20
> [ 1039.641224] [<ffffffff810a1258>] ? kvm_clock_read+0x38/0x70
> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
> [ 1039.641224] [<ffffffff81141c8f>] ? __blocking_notifier_call_chain+0x7f/0xc0
> [ 1039.641224] [<ffffffff83d8adb7>] down_read+0x47/0x8e
> [ 1039.641224] [<ffffffff81141c8f>] ? __blocking_notifier_call_chain+0x7f/0xc0
> [ 1039.641224] [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
> [ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
> [ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
> [ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
> [ 1039.641224] [<ffffffff8126629a>] allocate_slab+0x13a/0x1f0
> [ 1039.641224] [<ffffffff8126637b>] new_slab+0x2b/0x1b0
> [ 1039.641224] [<ffffffff83d030e1>] __slab_alloc.isra.34+0x1c5/0x31f
> [ 1039.641224] [<ffffffff81182492>] ? __lock_is_held+0x52/0x80
> [ 1039.641224] [<ffffffff8114b567>] ? __sdt_alloc+0x137/0x1f0
> [ 1039.641224] [<ffffffff81268e14>] kmem_cache_alloc_node_trace+0x114/0x390
> [ 1039.641224] [<ffffffff8123349b>] ? pcpu_alloc+0x32b/0x3e0
> [ 1039.641224] [<ffffffff8114b52b>] ? __sdt_alloc+0xfb/0x1f0
> [ 1039.641224] [<ffffffff8114b567>] ? __sdt_alloc+0x137/0x1f0
> [ 1039.641224] [<ffffffff8114b567>] __sdt_alloc+0x137/0x1f0
> [ 1039.641224] [<ffffffff811524d0>] ? partition_sched_domains+0x220/0x3f0
> [ 1039.641224] [<ffffffff81151d2c>] build_sched_domains+0x2c/0x4e0
> [ 1039.641224] [<ffffffff81152603>] partition_sched_domains+0x353/0x3f0
> [ 1039.641224] [<ffffffff81152397>] ? partition_sched_domains+0xe7/0x3f0
> [ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
> [ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
> [ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
> [ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
> [ 1039.641224] [<ffffffff83cfd6b8>] ? printk+0x5c/0x5e
> [ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
> [ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
> [ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
> [ 1039.641224] [<ffffffff811d5dc4>] ? rcu_eqs_exit_common+0x64/0x340
> [ 1039.641224] [<ffffffff811d7146>] ? rcu_eqs_enter_common+0x306/0x3a0
> [ 1039.641224] [<ffffffff8120cac5>] ? user_exit+0xa5/0xd0
> [ 1039.641224] [<ffffffff811813e8>] ? trace_hardirqs_on_caller+0x128/0x160
> [ 1039.641224] [<ffffffff8118142d>] ? trace_hardirqs_on+0xd/0x10
> [ 1039.641224] [<ffffffff8107ad34>] ? syscall_trace_enter+0x24/0x2e0
> [ 1039.641224] [<ffffffff811813e8>] ? trace_hardirqs_on_caller+0x128/0x160
> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
>
>
> Thanks,
> Sasha
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: sched: circular dependency between sched_domains_mutex and oom_notify_list
2013-02-19 4:48 ` Michael Wang
@ 2013-02-19 8:58 ` Michael Wang
0 siblings, 0 replies; 5+ messages in thread
From: Michael Wang @ 2013-02-19 8:58 UTC (permalink / raw)
To: Sasha Levin
Cc: Ingo Molnar, Thomas Gleixner, Peter Zijlstra, Paul E. McKenney,
Dave Jones, linux-kernel@vger.kernel.org
On 02/19/2013 12:48 PM, Michael Wang wrote:
> On 02/17/2013 01:42 PM, Sasha Levin wrote:
>> Hi all,
>>
>> I was fuzzing with trinity inside a KVM tools guest, with today's -next kernel
>> when I've hit the following spew.
>>
>> I suspect it's the result of adding the new rcu_oom_notify, but that happened
>> about half a year ago so I'm not sure why this showed up only now.
>
> Hi, Sasha
>
> This is a rarely one, isn't it? require 2 conditions:
> 1. system is oom.
> 2. rebooting.
>
> The possible dead lock related to oom_notify_list I suppose is:
>
> CONTEXT A CONTEXT B
>
> 1 oom reboot
>
> 2 LOCK oom_notify_list cpu_down()
>
> 3 rcu_oom_notify() LOCK cpu_hotplug.lock
>
> 4 get_online_cpus() partition_sched_domains()
>
> 5 LOCK cpu_hotplug.lock __sdt_alloc()
>
> 6 oom
>
> 7 LOCK oom_notify_list
>
> DEAD LOCK
>
> So rcu_oom_notify() trying to lock cpu_hotplug.lock with oom_notify_list
> locked, and __sdt_alloc() trying to lock oom_notify_list with
> cpu_hotplug.lock locked, a circular locking case.
>
> But I'm not sure why the log show the "sched_domains_mutex" as a target,
> so is your system really dead lock or it's just a fake report?
Oh, may be I use the wrong word here, the fake report means, you know,
some times there will be WARN, but it's fake, just like the case when
different lock have the same key/class...
Regards,
Michael Wang
>
> Regards,
> Michael Wang
>
>>
>> [ 1039.634183] ======================================================
>> [ 1039.635717] [ INFO: possible circular locking dependency detected ]
>> [ 1039.637255] 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286 Tainted: G W
>> [ 1039.639104] -------------------------------------------------------
>> [ 1039.640579] init/1 is trying to acquire lock:
>> [ 1039.641224] ((oom_notify_list).rwsem){.+.+..}, at: [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
>> [ 1039.641224]
>> [ 1039.641224] but task is already holding lock:
>> [ 1039.641224] (sched_domains_mutex){+.+.+.}, at: [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
>> [ 1039.641224]
>> [ 1039.641224] which lock already depends on the new lock.
>> [ 1039.641224]
>> [ 1039.641224]
>> [ 1039.641224] the existing dependency chain (in reverse order) is:
>> [ 1039.641224]
>> -> #2 (sched_domains_mutex){+.+.+.}:
>> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
>> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
>> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
>> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
>> [ 1039.641224] [<ffffffff83d8a19a>] __mutex_lock_common+0x5a/0x560
>> [ 1039.641224] [<ffffffff83d8a7cf>] mutex_lock_nested+0x3f/0x50
>> [ 1039.641224] [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
>> [ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
>> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
>> [ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
>> [ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
>> [ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
>> [ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
>> [ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
>> [ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
>> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
>> [ 1039.641224]
>> -> #1 (cpu_hotplug.lock){+.+.+.}:
>> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
>> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
>> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
>> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
>> [ 1039.641224] [<ffffffff83d8a19a>] __mutex_lock_common+0x5a/0x560
>> [ 1039.641224] [<ffffffff83d8a7cf>] mutex_lock_nested+0x3f/0x50
>> [ 1039.641224] [<ffffffff8110de77>] get_online_cpus+0x37/0x50
>> [ 1039.641224] [<ffffffff811d01b4>] rcu_oom_notify+0x94/0x150
>> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
>> [ 1039.641224] [<ffffffff81141ca8>] __blocking_notifier_call_chain+0x98/0xc0
>> [ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
>> [ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
>> [ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
>> [ 1039.641224] [<ffffffff8125d6ac>] alloc_pages_vma+0xfc/0x150
>> [ 1039.641224] [<ffffffff812509f0>] read_swap_cache_async+0x90/0x220
>> [ 1039.641224] [<ffffffff81250c1e>] swapin_readahead+0x9e/0xf0
>> [ 1039.641224] [<ffffffff8123af57>] do_swap_page.isra.41+0x107/0x5a0
>> [ 1039.641224] [<ffffffff8123d056>] handle_pte_fault+0x126/0x200
>> [ 1039.641224] [<ffffffff8123e4a7>] handle_mm_fault+0x397/0x3e0
>> [ 1039.641224] [<ffffffff8123e9d8>] __get_user_pages+0x418/0x5f0
>> [ 1039.641224] [<ffffffff81240563>] __mlock_vma_pages_range+0xb3/0xc0
>> [ 1039.641224] [<ffffffff81240a74>] __mm_populate+0xf4/0x170
>> [ 1039.641224] [<ffffffff81240e10>] sys_mlockall+0x160/0x1a0
>> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
>> [ 1039.641224]
>> -> #0 ((oom_notify_list).rwsem){.+.+..}:
>> [ 1039.641224] [<ffffffff8117fb55>] check_prev_add+0x115/0x640
>> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
>> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
>> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
>> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
>> [ 1039.641224] [<ffffffff83d8adb7>] down_read+0x47/0x8e
>> [ 1039.641224] [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
>> [ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
>> [ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
>> [ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
>> [ 1039.641224] [<ffffffff8126629a>] allocate_slab+0x13a/0x1f0
>> [ 1039.641224] [<ffffffff8126637b>] new_slab+0x2b/0x1b0
>> [ 1039.641224] [<ffffffff83d030e1>] __slab_alloc.isra.34+0x1c5/0x31f
>> [ 1039.641224] [<ffffffff81268e14>] kmem_cache_alloc_node_trace+0x114/0x390
>> [ 1039.641224] [<ffffffff8114b567>] __sdt_alloc+0x137/0x1f0
>> [ 1039.641224] [<ffffffff81151d2c>] build_sched_domains+0x2c/0x4e0
>> [ 1039.641224] [<ffffffff81152603>] partition_sched_domains+0x353/0x3f0
>> [ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
>> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
>> [ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
>> [ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
>> [ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
>> [ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
>> [ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
>> [ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
>> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
>> [ 1039.641224]
>> [ 1039.641224] other info that might help us debug this:
>> [ 1039.641224]
>> [ 1039.641224] Chain exists of:
>> (oom_notify_list).rwsem --> cpu_hotplug.lock --> sched_domains_mutex
>>
>> [ 1039.641224] Possible unsafe locking scenario:
>> [ 1039.641224]
>> [ 1039.641224] CPU0 CPU1
>> [ 1039.641224] ---- ----
>> [ 1039.641224] lock(sched_domains_mutex);
>> [ 1039.641224] lock(cpu_hotplug.lock);
>> [ 1039.641224] lock(sched_domains_mutex);
>> [ 1039.641224] lock((oom_notify_list).rwsem);
>> [ 1039.641224]
>> [ 1039.641224] *** DEADLOCK ***
>> [ 1039.641224]
>> [ 1039.641224] 4 locks held by init/1:
>> [ 1039.641224] #0: (reboot_mutex){+.+.+.}, at: [<ffffffff81128a2e>] sys_reboot+0xde/0x2b0
>> [ 1039.641224] #1: (cpu_add_remove_lock){+.+.+.}, at: [<ffffffff8110dea2>] cpu_maps_update_begin+0x12/0x20
>> [ 1039.641224] #2: (cpu_hotplug.lock){+.+.+.}, at: [<ffffffff8110dd87>] cpu_hotplug_begin+0x27/0x60
>> [ 1039.641224] #3: (sched_domains_mutex){+.+.+.}, at: [<ffffffff811522d8>] partition_sched_domains+0x28/0x3f0
>> [ 1039.641224]
>> [ 1039.641224] stack backtrace:
>> [ 1039.641224] Pid: 1, comm: init Tainted: G W 3.8.0-rc7-next-20130215-sasha-00003-gea816fa #286
>> [ 1039.641224] Call Trace:
>> [ 1039.641224] [<ffffffff83cff50f>] print_circular_bug+0xd3/0xe4
>> [ 1039.641224] [<ffffffff8117fb55>] check_prev_add+0x115/0x640
>> [ 1039.641224] [<ffffffff8118013a>] check_prevs_add+0xba/0x1a0
>> [ 1039.641224] [<ffffffff81074ef5>] ? sched_clock+0x15/0x20
>> [ 1039.641224] [<ffffffff811808c0>] validate_chain.isra.21+0x6a0/0x7b0
>> [ 1039.641224] [<ffffffff81183b43>] __lock_acquire+0xa13/0xb00
>> [ 1039.641224] [<ffffffff81074ef5>] ? sched_clock+0x15/0x20
>> [ 1039.641224] [<ffffffff810a1258>] ? kvm_clock_read+0x38/0x70
>> [ 1039.641224] [<ffffffff8118451a>] lock_acquire+0x1ca/0x270
>> [ 1039.641224] [<ffffffff81141c8f>] ? __blocking_notifier_call_chain+0x7f/0xc0
>> [ 1039.641224] [<ffffffff83d8adb7>] down_read+0x47/0x8e
>> [ 1039.641224] [<ffffffff81141c8f>] ? __blocking_notifier_call_chain+0x7f/0xc0
>> [ 1039.641224] [<ffffffff81141c8f>] __blocking_notifier_call_chain+0x7f/0xc0
>> [ 1039.641224] [<ffffffff81141ce1>] blocking_notifier_call_chain+0x11/0x20
>> [ 1039.641224] [<ffffffff81212155>] out_of_memory+0x45/0x1f0
>> [ 1039.641224] [<ffffffff812184dd>] __alloc_pages_nodemask+0x83d/0xbf0
>> [ 1039.641224] [<ffffffff8126629a>] allocate_slab+0x13a/0x1f0
>> [ 1039.641224] [<ffffffff8126637b>] new_slab+0x2b/0x1b0
>> [ 1039.641224] [<ffffffff83d030e1>] __slab_alloc.isra.34+0x1c5/0x31f
>> [ 1039.641224] [<ffffffff81182492>] ? __lock_is_held+0x52/0x80
>> [ 1039.641224] [<ffffffff8114b567>] ? __sdt_alloc+0x137/0x1f0
>> [ 1039.641224] [<ffffffff81268e14>] kmem_cache_alloc_node_trace+0x114/0x390
>> [ 1039.641224] [<ffffffff8123349b>] ? pcpu_alloc+0x32b/0x3e0
>> [ 1039.641224] [<ffffffff8114b52b>] ? __sdt_alloc+0xfb/0x1f0
>> [ 1039.641224] [<ffffffff8114b567>] ? __sdt_alloc+0x137/0x1f0
>> [ 1039.641224] [<ffffffff8114b567>] __sdt_alloc+0x137/0x1f0
>> [ 1039.641224] [<ffffffff811524d0>] ? partition_sched_domains+0x220/0x3f0
>> [ 1039.641224] [<ffffffff81151d2c>] build_sched_domains+0x2c/0x4e0
>> [ 1039.641224] [<ffffffff81152603>] partition_sched_domains+0x353/0x3f0
>> [ 1039.641224] [<ffffffff81152397>] ? partition_sched_domains+0xe7/0x3f0
>> [ 1039.641224] [<ffffffff8115274b>] cpuset_cpu_inactive+0x3b/0x50
>> [ 1039.641224] [<ffffffff83d9174e>] notifier_call_chain+0xee/0x130
>> [ 1039.641224] [<ffffffff81141b09>] __raw_notifier_call_chain+0x9/0x10
>> [ 1039.641224] [<ffffffff8110dd1b>] __cpu_notify+0x1b/0x30
>> [ 1039.641224] [<ffffffff83ce34ef>] _cpu_down+0xaf/0x350
>> [ 1039.641224] [<ffffffff83cfd6b8>] ? printk+0x5c/0x5e
>> [ 1039.641224] [<ffffffff8110e164>] disable_nonboot_cpus+0x84/0x1c0
>> [ 1039.641224] [<ffffffff811288f6>] kernel_restart+0x16/0x60
>> [ 1039.641224] [<ffffffff81128ab1>] sys_reboot+0x161/0x2b0
>> [ 1039.641224] [<ffffffff811d5dc4>] ? rcu_eqs_exit_common+0x64/0x340
>> [ 1039.641224] [<ffffffff811d7146>] ? rcu_eqs_enter_common+0x306/0x3a0
>> [ 1039.641224] [<ffffffff8120cac5>] ? user_exit+0xa5/0xd0
>> [ 1039.641224] [<ffffffff811813e8>] ? trace_hardirqs_on_caller+0x128/0x160
>> [ 1039.641224] [<ffffffff8118142d>] ? trace_hardirqs_on+0xd/0x10
>> [ 1039.641224] [<ffffffff8107ad34>] ? syscall_trace_enter+0x24/0x2e0
>> [ 1039.641224] [<ffffffff811813e8>] ? trace_hardirqs_on_caller+0x128/0x160
>> [ 1039.641224] [<ffffffff83d96198>] tracesys+0xe1/0xe6
>>
>>
>> Thanks,
>> Sasha
>> --
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>>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2013-02-19 8:58 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-02-17 5:42 sched: circular dependency between sched_domains_mutex and oom_notify_list Sasha Levin
2013-02-18 8:26 ` Ingo Molnar
2013-02-19 0:32 ` Sasha Levin
2013-02-19 4:48 ` Michael Wang
2013-02-19 8:58 ` Michael Wang
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