Hi Thomas,
On 7/28/06, Thomas Gleixner <[email protected]> wrote:
x86_64, latest git
tglx
[ 57.971202] =============================================
[ 57.973118] [ INFO: possible recursive locking detected ]
[ 57.973231] ---------------------------------------------
[ 57.973343] events/0/5 is trying to acquire lock:
[ 57.973452] (&nc->lock){.+..}, at: [<ffffffff8028f201>] kmem_cache_free+0x141/0x210
[ 57.973839]
[ 57.973840] but task is already holding lock:
[ 57.974040] (&nc->lock){.+..}, at: [<ffffffff80290501>] cache_reap+0xd1/0x290
[ 57.974420]
[ 57.974421] other info that might help us debug this:
[ 57.974625] 3 locks held by events/0/5:
[ 57.974729] #0: (cache_chain_mutex){--..}, at: [<ffffffff80290458>] cache_reap+0x28/0x290
[ 57.975171] #1: (&nc->lock){.+..}, at: [<ffffffff80290501>] cache_reap+0xd1/0x290
[ 57.975610] #2: (&parent->list_lock){.+..}, at: [<ffffffff8028f572>] __drain_alien_cache+0x42/0x90
[ 57.976056]
[ 57.976057] stack backtrace:
[ 57.976250]
[ 57.976251] Call Trace:
[ 57.976447] [<ffffffff802542fc>] __lock_acquire+0x8cc/0xcb0
[ 57.976562] [<ffffffff80254a02>] lock_acquire+0x52/0x70
[ 57.976675] [<ffffffff8028f201>] kmem_cache_free+0x141/0x210
[ 57.976790] [<ffffffff804a6b74>] _spin_lock+0x34/0x50
[ 57.976903] [<ffffffff8028f201>] kmem_cache_free+0x141/0x210
[ 57.977018] [<ffffffff8028f388>] slab_destroy+0xb8/0xf0
[ 57.977131] [<ffffffff8028f4c8>] free_block+0x108/0x170
[ 57.977245] [<ffffffff8028f598>] __drain_alien_cache+0x68/0x90
[ 57.977360] [<ffffffff80290501>] cache_reap+0xd1/0x290
[ 57.977473] [<ffffffff8029069f>] cache_reap+0x26f/0x290
[ 57.977588] [<ffffffff80249a13>] run_workqueue+0xc3/0x120
[ 57.977701] [<ffffffff80290430>] cache_reap+0x0/0x290
[ 57.977814] [<ffffffff80249c91>] worker_thread+0x121/0x160
[ 57.977928] [<ffffffff802305d0>] default_wake_function+0x0/0x10
[ 57.978045] [<ffffffff80249b70>] worker_thread+0x0/0x160
[ 57.978158] [<ffffffff8024d7ba>] kthread+0xda/0x110
[ 57.978270] [<ffffffff8020af2a>] child_rip+0x8/0x12
[ 57.978381] [<ffffffff804a725b>] _spin_unlock_irq+0x2b/0x60
[ 57.978496] [<ffffffff8020a53b>] restore_args+0x0/0x30
[ 57.978609] [<ffffffff8024d6e0>] kthread+0x0/0x110
[ 57.978719] [<ffffffff8020af22>] child_rip+0x0/0x12
Looks bad.
cache_reap
reap_alien (grabs l3->alien[node]->lock)
__drain_alien_cache
free_block
slab_destroy (slab management off slab)
kmem_cache_free
__cache_free
cache_free_alien (recursive attempt on l3->alien[node] lock)
Christoph?
Pekka
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