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    SubjectRe: [PATCH 0/4] [GIT PULL] tracing: recursion and compile fixes
    > > [   16.033417] Running tests again, along with the function tracer
    > > [ 16.039141] Running tests on trace events:
    > > [ 16.043063] Testing event kfree_skb: OK
    > > [ 16.052521] Testing event kmalloc: OK
    > > [ 16.061510] Testing event kmem_cache_alloc: OK
    > > [ 16.071902] Testing event kmalloc_node: OK
    > > [ 16.081756] Testing event kmem_cache_alloc_node: OK
    > > [ 16.091759] Testing event kfree: OK
    > > [ 16.100517] Testing event kmem_cache_free: OK
    > > [ 16.110523] Testing event irq_handler_exit: OK
    > > [ 16.120524] Testing event irq_handler_entry: OK
    > > [ 16.130521] Testing event softirq_entry: OK
    > > [ 16.139833] Testing event softirq_exit: OK
    > > [ 16.149597] Testing event lock_acquired: OK
    > > [ 16.160062] Testing event lock_acquire: OK
    > > [ 16.171719] Testing event lock_release: <0>BUG: spinlock lockup on CPU#0, swapper/0, 80cd0240
    > > [ 16.176013] Pid: 0, comm: swapper Not tainted 2.6.30-rc2-tip-01538-ge8201b9-dirty #34096
    > > [ 16.176013] Call Trace:
    > > [ 16.176013] [<80944340>] ? printk+0x15/0x1d
    > > [ 16.176013] [<803a410a>] _raw_spin_lock+0x19a/0x1b0
    > > [ 16.176013] [<80947bb7>] _spin_lock_irqsave+0x57/0x70
    > > [ 16.176013] [<8012b2ca>] __wake_up+0x1a/0x50
    > > [ 16.176013] [<8019392f>] trace_wake_up+0x2f/0x40
    >
    >
    > The function tracer, used in the selftest, uses trace_current_buffer_unlock_commit
    > which in turn calls trace_wake_up.
    >
    > The function tracer shouldn't call trace_wake_up() (might hold
    > the rq lock already).
    >
    > I'm preparing a fix.
    >

    Hmm, doesn't the trace wakeup test if the runqueue lock is locked or not?

    -- Steve



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