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Subject[2.6.35.14] kswapd: inconsistent lock state
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Date
I got one similar to https://lkml.org/lkml/2011/3/2/398 .
Bugfix not yet applied to 2.6.35.y ?

[ 4.626250] pciehp 0000:00:16.1:pcie04: HPC vendor_id 15ad device_id 7a0 ss_vid 15ad ss_did 7a0
[ 4.629244] pciehp 0000:00:16.2:pcie04: HPC vendor_id 15ad device_id 7a0 ss_vid 15ad ss_did 7a0
[ 4.629887]
[ 4.629895] =================================
[ 4.629919] [ INFO: inconsistent lock state ]
[ 4.629985] 2.6.35.14 #2
[ 4.629999] ---------------------------------
[ 4.630017] inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage.
[ 4.630035] kswapd0/39 [HC0[0]:SC0[0]:HE1:SE1] takes:
[ 4.630100] (cpu_hotplug.lock){+.+.?.}, at: [<c044ef63>] get_online_cpus+0x33/0x50
[ 4.630269] {RECLAIM_FS-ON-W} state was registered at:
[ 4.630269] [<c047b222>] mark_held_locks+0x62/0x90
[ 4.630269] [<c047b302>] lockdep_trace_alloc+0xb2/0xe0
[ 4.630269] [<c04ee8b3>] kmem_cache_alloc+0x23/0x160
[ 4.630269] [<c07d52f4>] timer_cpu_notify+0x56/0x244
[ 4.630269] [<c07de9a2>] notifier_call_chain+0x42/0x90
[ 4.630269] [<c046a9b9>] __raw_notifier_call_chain+0x19/0x20
[ 4.630269] [<c044edff>] __cpu_notify+0x1f/0x40
[ 4.630269] [<c07d4ec5>] _cpu_up+0x68/0x113
[ 4.630269] [<c07d4fe7>] cpu_up+0x77/0x86
[ 4.630269] [<c09d8361>] kernel_init+0xc6/0x1f3
[ 4.630269] [<c0409e02>] kernel_thread_helper+0x6/0x10
[ 4.630269] irq event stamp: 35
[ 4.630269] hardirqs last enabled at (35): [<c07db125>] _raw_spin_unlock_irqrestore+0x35/0x60
[ 4.630269] hardirqs last disabled at (34): [<c07da924>] _raw_spin_lock_irqsave+0x24/0x90
[ 4.630269] softirqs last enabled at (0): [<c044bb72>] copy_process+0x2b2/0xf00
[ 4.630269] softirqs last disabled at (0): [<(null)>] (null)
[ 4.630269]
[ 4.630269] other info that might help us debug this:
[ 4.630269] no locks held by kswapd0/39.
[ 4.630269]
[ 4.630269] stack backtrace:
[ 4.630269] Pid: 39, comm: kswapd0 Not tainted 2.6.35.14 #2
[ 4.630269] Call Trace:
[ 4.630269] [<c07d7ce7>] ? printk+0x18/0x21
[ 4.630269] [<c047a380>] print_usage_bug+0x150/0x160
[ 4.630269] [<c047b0f6>] mark_lock+0x2f6/0x3c0
[ 4.630269] [<c04781fb>] ? trace_hardirqs_off+0xb/0x10
[ 4.630269] [<c047a4b0>] ? check_usage_forwards+0x0/0xd0
[ 4.630269] [<c047bca7>] __lock_acquire+0x3e7/0x12e0
[ 4.630269] [<c046b500>] ? pm_qos_power_write+0xf0/0x120
[ 4.630269] [<c047cc26>] lock_acquire+0x86/0xb0
[ 4.630269] [<c044ef63>] ? get_online_cpus+0x33/0x50
[ 4.630269] [<c07d91b7>] __mutex_lock_common+0x47/0x360
[ 4.630269] [<c044ef63>] ? get_online_cpus+0x33/0x50
[ 4.630269] [<c07db125>] ? _raw_spin_unlock_irqrestore+0x35/0x60
[ 4.630269] [<c07d95aa>] mutex_lock_nested+0x3a/0x50
[ 4.630269] [<c044ef63>] ? get_online_cpus+0x33/0x50
[ 4.630269] [<c044ef63>] get_online_cpus+0x33/0x50
[ 4.630269] [<c04cf591>] restore_pgdat_percpu_threshold+0x11/0x100
[ 4.630269] [<c0465829>] ? prepare_to_wait+0x49/0x70
[ 4.630269] [<c04ca50d>] kswapd+0x83d/0x870
[ 4.630269] [<c047b63b>] ? trace_hardirqs_on+0xb/0x10
[ 4.630269] [<c07db0e2>] ? _raw_spin_unlock_irq+0x22/0x30
[ 4.630269] [<c043c911>] ? finish_task_switch+0x71/0xc0
[ 4.630269] [<c043c8a0>] ? finish_task_switch+0x0/0xc0
[ 4.630269] [<c07d8201>] ? schedule+0x361/0x820
[ 4.630269] [<c07db125>] ? _raw_spin_unlock_irqrestore+0x35/0x60
[ 4.630269] [<c04655a0>] ? autoremove_wake_function+0x0/0x40
[ 4.630269] [<c04c9cd0>] ? kswapd+0x0/0x870
[ 4.630269] [<c04651fc>] kthread+0x7c/0x90
[ 4.630269] [<c0465180>] ? kthread+0x0/0x90
[ 4.630269] [<c0409e02>] kernel_thread_helper+0x6/0x10
[ 4.706205] pciehp 0000:00:16.2:pcie04: service driver pciehp loaded
[ 4.707831] pciehp 0000:00:16.3:pcie04: HPC vendor_id 15ad device_id 7a0 ss_vid 15ad ss_did 7a0


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