I saw this lock detector output during bootup. No clue who should
look at it? This is using 2.6.18-rc3 (latest) on x86_64.
[ 42.260313] =============================================
[ 42.277309] [ INFO: possible recursive locking detected ]
[ 42.293594] ---------------------------------------------
[ 42.309878] swapper/1 is trying to acquire lock:
[ 42.323825] (&nc->lock){.+..}, at: [<ffffffff8107a467>] kmem_cache_free+0x121/0x1d6
[ 42.347591]
[ 42.347592] but task is already holding lock:
[ 42.365355] (&nc->lock){.+..}, at: [<ffffffff8107aa74>] kfree+0x125/0x1da
[ 42.386368]
[ 42.386369] other info that might help us debug this:
[ 42.406211] 2 locks held by swapper/1:
[ 42.417560] #0: (&nc->lock){.+..}, at: [<ffffffff8107aa74>] kfree+0x125/0x1da
[ 42.440053] #1: (&parent->list_lock){....}, at: [<ffffffff8107a90e>] __drain_alien_cache+0x34/0x75
[ 42.468024]
[ 42.468025] stack backtrace:
[ 42.481376]
[ 42.481377] Call Trace:
[ 42.493541] [<ffffffff8100ae89>] show_trace+0xae/0x31f
[ 42.509335] [<ffffffff8100b10f>] dump_stack+0x15/0x17
[ 42.524867] [<ffffffff81043e41>] __lock_acquire+0x12e/0x9fa
[ 42.542034] [<ffffffff81044c80>] lock_acquire+0x4b/0x69
[ 42.558162] [<ffffffff81250b62>] _spin_lock+0x2f/0x3c
[ 42.573775] [<ffffffff8107a467>] kmem_cache_free+0x121/0x1d6
[ 42.591252] [<ffffffff8107a5af>] slab_destroy+0x93/0x9c
[ 42.607433] [<ffffffff8107a6a0>] free_block+0xe8/0x133
[ 42.623354] [<ffffffff8107a934>] __drain_alien_cache+0x5a/0x75
[ 42.641351] [<ffffffff8107aa89>] kfree+0x13a/0x1da
[ 42.656234] [<ffffffff816e0bda>] free+0x9/0xb
[ 42.669680] [<ffffffff816e0bf7>] huft_free+0x1b/0x27
[ 42.684953] [<ffffffff816e1db6>] inflate_dynamic+0x4e9/0x51d
[ 42.702303] [<ffffffff816e22b7>] unpack_to_rootfs+0x4cd/0x930
[ 42.719912] [<ffffffff816e277f>] populate_rootfs+0x65/0xe7
[ 42.739520] [<ffffffff81007133>] init+0xd2/0x317
[ 42.753752] [<ffffffff8100a80a>] child_rip+0x8/0x12
[ 42.769328] DWARF2 unwinder stuck at child_rip+0x8/0x12
[ 42.785096] Leftover inexact backtrace:
[ 42.796710] [<ffffffff81251118>] _spin_unlock_irq+0x2b/0x53
[ 42.813799] [<ffffffff81009e1b>] restore_args+0x0/0x30
[ 42.829591] [<ffffffff8113a581>] acpi_os_acquire_lock+0x9/0xb
[ 42.847199] [<ffffffff81007061>] init+0x0/0x317
[ 42.861146] [<ffffffff8100a802>] child_rip+0x0/0x12
[ 42.876156]
[ 42.886463] it is
[ 42.922991] Freeing initrd memory: 862k freed
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